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5.2. PCSR 08-14-2007REQUEST FOR ACTION ver To Item Number Plannin Commission 5.2 Agenda Section Meeting Date Prepared by Plannin Items Au ust 14, 2007 Chris Leeseber ,Park Planner Item Description Reviewed by Request by Alliance Machine for Ordinance Amendment To erem Barnhart, Plannin Mana er Section 30-1294 -Business Park Regulations, Regarding Reviewed by Accessory Structures, Case No. OA07-07, Public Hearing Action Requested Staff recommends that the Planning Commission recommend approval of the proposed language as shown in Exhibit A. Background/Discussion The reason the applicant is requesting an amendment to allow accessory structures in the Business Park zoning district is they need to provide separate warehousing space to store certified material (steel and aluminum bars) for an aerospace customer to meet the military and aerospace compliances, which are mandated. The Planning Commission discussed this topic at a previous workshop meeting and directed staff to draft the language as shown to allow one accessory structure as a Conditional Use Permit in the Business Park zoning district. Attachments • Location Map • Applicant's Narrative • Site Plan • Building Sketches • Other City Ordinances • Exhibit A (Proposed Language) Action Motion by Second by Vote Follow Up Case File: OA 07-07 Page: 2 General Information Ordinance Amendment Alliance Machine Applicant Alliance Machine 60 Day Rule The application has been deemed complete as of May 10, 2007. The City must take action by June 30, 2007 Requested Action Ordinance Amendment Location and Size All Business Park zoning districts Overview Currently accessory structures axe not allowed in the Business Park zoning district. The applicant would like to construct an accessory structure for storage of certified material. Attached to this structure would be a dumpster enclosure which is required by the City. They have indicated the structure would be built of the same materials as the existing building, which does meet the design guidelines for the district. The storage of certified material does not have to be in a separate structure. With the applicant's specific property, they want to build a detached structure, verses an attached structure, so they can expand the size of our current building when needed in the future. Their hope is this will occur in 5-10 years. If they attach the new structure to the current building, it will block emergency vehicle access to the back of their building, which they built per the City's request specifically for emergency vehicle access. For these reasons, the applicant is asking for an Ordinance Amendment to allow an accessory structure in the Business Park zoning districts. Planning Commission Actions The Planning Commission reviewed this request at their meeting on June 12, 2007. Due to lack of information, they tabled the request to review it at their next workshop meeting. The Planning Commission discussed this topic at a workshop meeting. After much discussion the Planning Commission felt that accessory structures were appropriate only when matching the principal structure. There was discussion on how they could be allowed as an Interim Use, but was decided that financially that would be negative. The Planning Commission directed staff to draft the language as shown in Exhibit A to allow one accessory structure as a Conditional Use Permit in the Business Park zoning district. This a summary of what is being recommend: 1. A Conditional Use Permit would be required for all accessory structures. 2. Accessory structures would need to meet the design guidelines for the Business Park zoning district. 3. The maximum size allowed for an accessory structure be limited to 1,200 square feet per property. S:\PLANNINCU\Case Piles\OA\OA 07-07 Alliance Machine Request\OA 07-07_PC-2.doc Case bile: OA 07-07 Page 3 4. Accessory structures shall not be allowed in front yards. 5. Setbacks: a. Front: 30-Feet or 35-Feet (Depends on what type of road it is on~ b. Side: 10-Feet c. Rear: 10-Feet 6. Building height shall be limited to 15-feet. Respectfully Submitted Chris Leeseberg Park Planner /Planner Ordinance Amendment Alliance Machine S:\PLANNING\Case Files\OA\OA 07-07 Alliance Machine Request\OA 07-07_PC-2.doc i~ ~~~~~~N ., .. ~.. ~_ ._ ,_ ~. ___ .~...... ~~ Location Map N City of El -~-~ "" Case Number: OA 07-07 ALLIANCE MACHINE River Greetings, The following is a proposal for a small storage building with an attached dumpster enclosure on the Alliance Machine Inc. property at 17520 Tyler Street, Elk River. This location is in the Northstar Business Park. The purpose is to store certified material (steel and aluminum bars) separate from our current in house stock. Our aerospace customer insists we do this to meet the military and aerospace compliances which are mandated. If we cannot provide separate warehousing for this material we could j eopardize our business relationship with one of our largest accounts. This additional structure would be constructed of the same materials and conform to the same architecture as our current building. We would also attach to this storage building a dumpster enclosure as requested by the city. Alliance Machine Inc. moved to Elk River in April of 2006. Alliance Employs 32 people. We have approximately parking for 50 vehicles and expansion for 50 more if need be. We currently do not have any outdoor storage. Because of appearance, we do not wish to store anything outside. There would be no grading or tree removable needed to put up our storage building. The building would be constructed of rough faced block to match the building and have a steel gate locking the dumpster area. The estimated time frame would be about 60 days to complete. The reason we ask for the amendment to allow us to build a detached structure, verses an attached structure, is so we can expand the size of our current building when needed in the future. If we attach the new structure to the current building, this will prevent any future expansion and block fire truck access to the back of our building. We had a drive way built in back just for fire truck access. Alliance, by request of the city, needs to build a detached structure for the dumpster enclosure. We are currently asking to build a storage facility connected to the dumpster enclosure instead of the existing building. If this is permitted, the structure will be done tastefully and professionally. It will have matching stone and fit the theme of the surrounding buildings. The benefit to the city will be that this storage building will prevent any outside storage that seems to take place in some of the older industrial parks. It will be made from block and other maintence free material so it will look uniform to its surroundings and, it will promote a more safe and secure area in and around Northstar Business Park. Thanks for your consideration. Sincerely, Bryan Provo Alliance Machine Inc. 17520 Tyler Street Elk River, MN 55330 (p)763-425-1616 (f)763-425-2067 CDI sa - o~ voce of i~-ee~ BANK dumpster FUTU R E PARKING shell future expansion n - u _ - n - II - II - II - II ,u ReTAIN I NG. WALL 34 PP,RKING sPACes ~II I~o._o~ ~ ~ ~ o I-~ ~-- ~ Y `~ ~~ ~ '~ o,.,,. st ~ 5~.- `~ U "`'~ l F `~ y, 4 .. .~M' *~- l ~..._ ..f~. /: ~:a ~ ~ ~ ~ ~ ~~' ' y ,~ ~Y~/ - iI i i t t ~ ~ .~. ,...i. ' ~ -1", V f ...w---f_.. . i , w„o.....,~~..d-.. t O t. ~~ +~ `~ t7 .. i(.y a S .~ < `~ ~ .'~'' {' ~' _~ \..p .i -~ ~ w ~~ X ~ _ ~. ll. ~/- ~ ~ 4 ~ City of Big Lake Chapter 10 Zoning Section 1055 - B-1 District Subd. 11. Parks, trails, playgrounds, and directly related buildings and structures; City of Big Lake only. Subd. 12. Personal Services. Subject to any licensing requirements of the City Code, County or State. Subd. 13. Personal wireless service antennas located upon a public structure or existing tower, as regulated by Section 1022 (Antennas) of this Ordinance. Subd. 14. Radio and television stations. Subd. 15. Reception halls. Subd. 16. Sexually Oriented Use-Principal, subject to the requirements of Section 1035 (Sexually Oriented Business) of this Ordinance and license requirements of the City. Subd. 17. Trade schools, private. Subd. 18. Wholesale showrooms. 1055.03: ACCESSORY USES: Subject to applicable provisions of this Ordinance, the following are permitted accessory uses in a B-1 District: Subd. 1. Accessory uses incidental and customary to the uses allowed as permitted, conditional, interim, and administrative permit in this Section. Subd. 2. Accessory radio and television receiving antennas including single satellite dish TVRO's two (2) meters or less in diameter, short wave radio dispatching antennas, or those necessary for the operation of household electronic equipment including radio receivers, federal licensed amateur radio stations and television receivers, as regulated by Section 1022 (Antennas) of this Ordinance. Subd. 3. Accessory Antennas. Accessory antennas in conformance with Section 1022 (Antennas) of this Ordinance. Subd. 4. Garage, Private. Private garages and parking spaces for licensed and operable passenger cars and trucks not to exceed a gross weight of twelve thousand pounds, as regulated by Section 1030 (Off-Street Parking and Loading) of this Ordinance. Subd. S. Canopies: Canopies associated with automobile service stations and convenience stores with gasoline and located over pump islands or associated with banks shall be allowed as accessory structures in the B-1 zoning district subject to the following provisions: 1055 - 2 City of Big Lake Chapter 10 Zoning Section 1055 - B-1 District Subd. 2. Non-Shoreland Distri ct Requirements. (Ord. 2004-19, 8/11/04). 1. Principal Structures. District Area Minimum: 20 acres Minimum Lot Area Interior Lot: 1 acre Minimum Lot Width Interior Lot: 100 feet Maximum Height Principal Structure: 45 feet Maximum Building Coverage: 35% Principal Structure Setbacks: Front: 50 feet Side: 30 feet Rear: 30 feet 2. Accessory Structures Maximum Height Accessory Structure: 17 feet Accessory Structure Setbacks Not adjacent to Residential: Front: Not permitted in front yard without CUP Side: 10 feet Rear: 10 feet Accessory Structure Setbacks Adjacent to Residential: Front: Side: Rear: Parking Setback: Front: Side: Rear: 30 feet (from delineated boundary) 50 feet (from right-of--way line) 45 feet (from right-of--way line) 10 feet (from right-of--way line) Not permitted in front yard without CUP 20 feet 20 feet 30 feet (or as specifically identified) 20 feet (or as specifically identified) 20 feet (or as specifically identified) Subd. 3. Other Requirements. Wetland Setback & Buffer: Arterial Road: Collector Road: Railroad Setback: 1055 - 9 City of Big Lake Chapter 10 Zoning Section 1056 - B-2 District Subd. 28. Service Business (On-Site) not exceeding four thousand (4,000) gross square feet of floor area. Subd. 29. Sexually Oriented Use-Principal, subject to the requirements of Section 1035 (Sexually Oriented Business) of this Ordinance and license requirements of the City. Subd. 30. Shoe Sales and Repair. Subd. 31. Small Appliance Repair. 1056.03: ACCESSORY USES: The following are permitted accessory uses in a B-2 District: Subd. 1. Accessory Antennas. Accessory antennas in conformance with Section 1022 (Antennas) of this Ordinance. Subd. 2. Accessory uses and structures incidental and customary to the uses allowed as permitted, conditional, interim, and administrative permit in this Section. Subd. 3. Garage, Private. Private garages and parking spaces for licensed and operable passenger cars and trucks not to exceed a gross weight of twelve thousand pounds, as regulated by Section 1030 (Off-Street Parking and Loading) of this Ordinance. Subd. 4. Canopies: Canopies associated with automobile service stations and convenience stores with gasoline and located over pump islands or associated with banks shall be allowed as accessory structures in the B-2 zoning district subject to the following provisions: 1. Canopy setbacks shall be a minimum of fifteen (15) feet from the property line. Adequate visibility both on and off site must also be maintained. 2. Canopies shall not be allowed in rear yards not abutting a public street. 3. Maximum canopy height may not exceed twenty (20) feet, and shall provide a minimum clearance of fourteen (14) feet. 4. Canopy facades may not exceed three (3) feet in height. • 5. Canopy lighting shall be recessed and reflected glare or spill light may not exceed five-tenths (0.5) foot candles, as measured on the property line when abutting residentially zoned property and one (1) foot candle measured on the property line when abutting other commercial or industrially zoned property. 6. Signage may be allowed on the canopy as permitted by City Code Chapter 1300 (Signs). 1056-3 City of Big Lake Chapter 10 Zoning Section 1056 - B-2 District Buildings containing a bowling alley, electronic game room containing six (6) or more electronic games, billiard room, pool room, skating rink, tavern, or fraternal organization shall not be located within one hundred (100) feet of any R District. Subd. 2. Lot and Setback Provisions: Principal Structures and Parking: (Ord. 2004- 19, 8/11/04; Ord. 2006-08, 5/10/06). -~ Descri tion Standard Minimum Lot Area: 20,000 s uare feet Minimum Lot Width: 100 feet Accesso Structure Maximum Hei ht: 17 feet Setback Description Principal Accessory Parking Parking Structure Structure Adjacent to "R" District Front Yard: 30 feet N/A w/o 15 feet 30 feet CUP Side Yard: 10 feet 10 feet 10 feet 20 feet 20 feet if adjacent to "R" ro e Rear Yard: 30 feet 10 feet 10 feet 20 feet 20 feet if adjacent to "R" ro e Princi al Arterial Road: 30 feet 20 feet Minor Arterial Road: 30 feet Collector Road: 30 feet Rail Road lti ht-of-Wa 10 feet General Develo ment Lake 50 feet Recreational Develo ment Lake 75 feet Natural Environment Lake 150 feet To of Bluff 30 feet River -Agricultural River (Elk River) 50 feet for structures w/ public sewer and water River -Forested River (St. Francis & Snake 150 feet Rivers Wetland Setback & Buffer 30 feet from delineated bound When located on a lot with lake or river frontage, anon-water orientated use or structure setback must be double the distance indicated above (see section 1065.04, subd. 2. General Zoning Provisions). Subd. 3. Building Height. No structure shall exceed 35 feet, however building heights in excess of the prescribed standard may be permitted through a conditional use permit provided that: 1. The site is capable of accommodating any increased intensity of use. 1056 - 19 City of Big Lake Chapter 10 Zoning Section 1057 - B-3 District or shall be set back at least one hundred fifty (150) feet from residentially zoned or guided property and provide a buffer yard consistent with the provisions of Section 1027 (Landscape, Screening and Tree Preservation) of this Ordinance. No part of the public street or boulevard may be used for stacking of automobiles. 4. The facility's public address system shall not be audible from any adjacent residentially zoned or guided property and comply with the provisions of Section 1032 (Performance Standards) of this Ordinance. Businesses with one (1) drive through lane shall provide stacking space for at least ten (10) vehicles, and businesses with two (2) or more drive through lanes shall provide stacking space for at least six (6) vehicles per lane, as measured from and including the last pick up station, window, or the like. Stacking spaces shall not interfere with parking spaces or traffic circulation. 6. The applicant shall demonstrate that such use will not significantly lower the existing level of service on streets and intersections. 7. Alcoholic beverages shall not be sold or served through drive through lanes. All elements of the drive through service area, including but not limited to menu boards, order stations, teller windows, and vehicle lights from the stacking lanes, shall be screened from adjacent residentially zoned or guided property pursuant to Section 1027 (Landscape, Screening and Tree Preservation) of this Ordinance. 9. Alighting and photometric plan will be required that illustrates that the drive- through service lane lighting shall comply with Section 1032 (Performance Standards) of this Ordinance. 10. Noise. The stacking lane, order board intercom and window placement shall be designed and located in such a manner as to minimize noises and glare as to adjacent premises, particularly residential premises, and to maximize maneuverability of vehicles on the site. 11. Traffic Control. The stacking lanes and their drive's access must be designed to control traffic in a manner to protect the buildings and green area on the site. 12. Hours of Operation. The hours of operation may be limited as necessary to minimize the nuisance factor such as traffic, noise, or glare. Subd. 6. Fences as regulated by Section 1025 (Fences) of this Ordinance. Subd. 7. Garage, Private. Private garages and parking spaces for licensed and operable passenger cars and trucks not to exceed a gross weight of twelve thousand pounds, as regulated by Section 1030 (Off-Street Parking and Loading) of this Ordinance. 1057 - 5 City of Big Lake Subd. 1. Special Setback Limitations. Chapter 10 Zoning Section 1057 - B-3 District Buildings containing a bowling alley, electronic game room containing six (6) or more electronic games, billiard room, pool room, skating rink, tavern, or fraternal organization shall not be located within one hundred (100) feet of any R District. Subd. 2. Lot and Setback Provisions: (Ord. 2004-19, 8/11/04; Ord. 2006-08, 5/10/06). Descri tion Standard Minimum Lot Area: 20,000 s uare feet Minimum Lot Width: 100 feet Accesso Structure Maximum Hei ht: 17 feet --j Setback Description Principal Accessory Parking Parking Structure Structure Adjacent to "It" District Front Yard: 30 feet N/A w/o 10 feet 30 feet CUP Side Yard: 10 feet 10 feet 10 feet 20 feet 20 feet if adjacent to "R" ro e Rear Yard: 30 feet 10 feet 10 feet 20 feet 20 feet if adjacent to "R" ro e Princi al Arterial Road: 30 feet 20 feet Minor Arterial Road: 30 feet Collector Road: 30 feet Rail Road Ri ht-of-Wa 10 feet General Develo ment Lake 50 feet Recreational Develo ment Lake 75 feet Natural Environment Lake 150 feet To of Bluff 30 feet River -Agricultural River (Elk River) 50 feet for structures w/ public sewer and water River -Forested River (St. Francis & Snake 150 feet Rivers Wetland Setback & Buffer 30 feet (from delineated bound When located on a lot with lake or river frontage, anon-water orientated use or structure setback must be double the distance indicated above (see section 1065.04, Subd. 2. General Zoning Provisions). 1057 - 22 Subd. 4. Accessory Uses (Subject to Standards established in Subd. 4 and Performance Standards established in §9.10) a. Commercial or business buildings and structures for a use accessory to the principal use but such use shall not exceed thirty percent (30%) of the gross floor space of the principal use unless otherwise approved by the City Council. b. Open and outdoor areas for display of goods for sale and rental. c. Off-street parking including semi-trailer trucks, as regulated and required by this Chapter. d. Off-street loading as regulated and required by this Chapter. e. Signing as regulated by the City Code. f. Temporary seasonal sales. g. Motor vehicle implement and recreational indoor storage when accessory to sales and service. Subd. 5 Standards (Also refer to §9.10 for general performance standards). a. Bulk Standards Standard Re uirement Minimum Lot Area % acre Minimum Lot Width 100 feet Minimum Lot De th 150 feet Maximum Buildin Hei ht 35 feet Maximum Structure Area 35% of lot area Minimum Buildin Setbacks Front Yard 35 feet Side Yard 10 feet Side Yard on Corner Lot 20 feet Rear Yard 35 feet Major and minor arterials and County and State Roadways 60 feet from centerline of road right-of--way plus the local a licable setback Parking and pavement (includes maneuvering areas) setback from street ri ht-of-wa 20 feet Public/Private service roads 25 feet Exhibit A Sec. 30-1294. BP business park district. (a) Purf~o.re. (1) The business park district is established to encourage a planned, integrated environment for certain industrial, office, and commercial uses, which are compatible with and complement each other as well as the surrounding land uses. The underlying land use designation within the district may vary and may be either light industrial or highway business. Development within the business park district will correspond with the land use designation. Industrial and office uses are allowed where the land use designation is light industrial, and commercial uses are allowed where the land use designation is highway business. (2) It is the intent of this section that development reflect common themes using compatible architectural design and consistency in signage, landscaping, and lighting. It is also the intent to encourage businesses, which generate a high number of jobs per square foot rather than predominantly warehouse type uses. (b) Permitted uses. Permitted uses in the BP district are as follows: (1) Permitted uses allowed are as follows: a. Light manufacturing. b. Research and development laboratories. c. Business and professional offices. d. Mail order operations. e. Telecommunication operations. f. Sherburne County fair. g. Warehouse space not exceeding 50 percent of the entire building. h. Showroom space. i. Repair and maintenance, excluding auto repair. j. Physical Recreation or Training, if less than 5,000 square feet, provided the underlying land use in the Comprehensive Plan is Mixed Use or Highway Business. (c) Accessory uses. Accessory uses in the BP district are as follows: (1) Off-street parking lots or facilities. (2) Private recreational facilities. (3) Public shelters and essential services. (4) Retail sales, provided the following conditions are met: a. The retail sales activity shall not be located in an administrative office facility, but shall be located within a business, the principal use of which is not commercial sales. b. The retail sales activity shall not occupy more than 15 percent of the gross floor area, or a maximum of 5,000 square feet of the occupied quarters, whichever is less. c. The retail sales activity shall be related and subordinate to the principal use. d. No sign identifying or promoting that retail sales occur within the building shall be visible from outside the building. e. Freestanding retail shops and stores shall be limited to those which complement other uses within the business park and provide a service to those other businesses, and shall not exceed 20,000 square feet in size. £ Retail/wholesale sales incidental to products manufactured, assembled, or warehoused on the premises may be permitted as an accessory use provided no more than ten percent of the building is used for retail/wholesale sales. (5) Therapeutic massage when offered within the confines of a medical or chiropractic clinic. (6) Temporary signs as permitted in section 30-851 et seq. (7) Permanent signs. (d) Conditional uses. Conditional uses in the BP district are as follows: 1. Accessory Structure provided the materials are the same as those of the existing principal structure. 2. ~ Warehouse space exceeding 50 percent of the total building floor area up to a maximum of 65 percent. 3. b- Vocational, technical and trade schools. 4. e: Loading areas/overhead doors when located in front yards. 5. ~: Aboveground storage tanks. 6. e- Government buildings and facilities. 7. ~ Motor vehicle repair shops, provided that they meet the following conditions: a. ~-: All repair services shall be conducted inside the building. b. ~: Merchandise shall be stored inside the building. e. ~: All damaged vehicles stored on the premises shall be stored within an area which is screened by a six-foot high 100 percent opaque fence constructed of factory finished metal or vinyl material. d. 4. The building shall comply with the material requirements of this section, and 30 percent of any building face and all overhead doors facing any public street shall be constructed of glass material. e. 5- No sales or display of merchandise outside the building. f. Er. The building shall be a minimum of 15,000 square feet. 8. g: Governmental offices. 9.1-r. Physical Recreation or Training, if 5,000 sq feet or greater, provided the underlying land use as provided in the Comprehensive Plan is Mixed Use or Highway Business. (e) Additional.rtandards. The following additional standards apply in the BP district: (1) Loading spaces and overhead doors. a. Loading spaces/overhead doors shall be located in designated rear yards and secondarily in designated side yards. Loading areas/overhead doors shall not be located in designated front yards unless approved as a conditional use. b. Loading spaces and overhead doors shall be designed to be compatible with the principal building. Architectural techniques and landscaping shall be employed to reduce visual impacts from adjacent properties and roadways. (2) Dump.rterr and refuse enclosures. a. All dumpsters shall be completely screened from public view by using enclosures constructed of similar material as the principal building. b. Refuse enclosures shall include gates and be located in designated rear or side yards. (3) Rooftop orground electrical equipment,• signs. a. All utility equipment shall either be: 1. Screened from the eye level view of adjoining properties by use of exterior walls and/or landscaping; 2. Painted to match or complement the building structures; or 3. Incorporated into an architectural design, as approved by the building and zoning administrator. b. Notwithstanding the provisions of subdivision II of division 5 of this article, the following requirements regarding signage shall be met: 1. All freestanding signage shall be of a monument style sign and have a maximum size of 64 square feet and height of eight feet. 2. One on-premises business wall sign per occupancy, not to exceed two square feet in sign area fox each linear foot of the building frontage up to a maximum of 128 square feet per occupancy, is permitted. (4) Exterior building finishes. a. It is the intent of the city to promote and encourage high standards of creative architectural design in the business park district. b. In the business park zoning district, the following are acceptable building materials and finishes: 1. Brick. 2. Natural or cut stone. 3. Integrally colored split face (rock face), burnished, or glazed concrete masonry unit (excluding plain or painted). 4. Integrally colored and exposed aggregate precast concrete panels (excluding single-T or double-T panels, plain, uncolored, or raked finish) or specially designed, cast-in-place concrete. 5. Glass, architectural metal, fiberglass and aluminum, provided such panels are factory fabricated and finished with a durable nonfade surface and their fasteners are of acorrosion-resistant design. 6. Stucco, E.LF.S., and other cementitious coating. 7. Wood, provided the surfaces are finished for exterior use or wood of proven exterior durability is used, such as cedar, redwood, and/or cypress. 8. Other materials determined as acceptable by the planning department. c. Major exterior surfaces that are adjacent to any public street, public trail/path, or adjacent residentially zoned properties shall be of one of the acceptable materials and shall be combined with at least 30 percent of one or more acceptable materials, or with 40 percent punched openings, with or without glass (or as much as allowed by the Uniform Building Code, whichever is less), neither of which are to be concentrated in any one location, unless to accentuate a design feature. Major exterior surfaces that are visible from but not adjacent to any public street, public trail/path, or adjacent residentially zoned properties shall be considered transition walls and may have less than the 30 percent combination or less than 40 percent punched openings, but either shall not be reduced to zero percent). Reductions below 20 percent shall require staff approval. Such walls shall be screened from view with additional landscaping. The requirement to have at least 30 percent of one or more acceptable materials shallnot apply to the loading dock wall. d. Major exterior surfaces that are adjacent to any public street, public trail/path, or adjacent residentially zoned properties shall not exceed 160 feet zero inches in length without a minimum four-foot depth change (recesses, protrusions, or a combination thereof), with at least two feet of such change to be in the entire height of the facade. e. Alternatively, exterior wall surfaces are to be designed with architectural interest through multiple design techniques such as, but not limited to, architectural forms, reveals, textures, cornice detailing, changes in surface planes, color, punched openings and/or changes in parapet elevations. The use of design techniques alone or lower percentage of additional acceptable materials noted in subsection (e)(4)c of this section shall require site plan review and approval by the city planning commission. £ The building shall be designed so as to prevent the appearance of straight, unbroken lines in the horizontal and vertical surfaces. g. Main entrances shall be emphasized with a complementary material which is different from the primary building material. h. Garage doors shall have a color that matches or coordinates with the building's primary body color. i. The building shall be designed to screen equipment located on the roof of the building. Alternatively, such equipment shall be located in such a manner so that it cannot be seen from the adjacent public street, public path/trail, or adjacent residentially zoned property at the same elevation of the first floor of the building. (5) Landscaping. Notwithstanding the provisions of subdivision IV of division 5 of this article, the following requirements shall be met: a. Of the total number of overstory trees required, a minimum of 25 percent shall be ornamental trees and 25 percent shall be conifer trees. b. A landscaping credit of up to 25 percent may be given to a site plan which contains exterior sculptures, fountains, ponds beyond those required for storm drainage and other site enhancements as approved by the building and zoning administrator. c. Underground irrigation shall be installed within the front yard and all landscaped areas adjacent to a public right-of--way. Sec. 30-1312. Accessory structure setbacks. Accessory structures shall comply with the following dimensional regulations: TABLE INSET: Front Side ear Maximum Maximum Agricultural District Setback (feet) Setback (feet) Setback (feet) S uare Foota a Height (feet) Fences (feet) Buildtngs (feet) I-1 30 10 10 40 0 -- I-2 30 10 10 60 0 -- BP Ol 10 10 12002 15 1 Must be 35 feet if along arterial or collector street. An accessory structure shall not be allowed in frontward. 2 Only one (1~ accessory structure shall be allowed. (Code 1982, ~ 900.18(2)) Secs. 30-1313--30-1561. Reserved.