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Thornton, CO Forecast

ARCHITECTURAL REVIEW APPLICATION SUPPLEMENT

DESIGN REVIEW CRITERIA

SINGLE-FAMILY DETACHED AND DUPLEX RESIDENTIAL PROJECTS (SECTION A)

THIS MATERIAL REPRESENTS A SYNOPSIS OF WHAT THE DESIGN STANDARDS ORDINANCE REQUIRES.  THIS SERVES AS A USEFUL RESOURCE FOR COMPILING THE INFORMATION REQUIRED FOR ARCHITECTURAL REVIEW.   APPLICANTS SHOULD REFER TO SECTION 18-532 OF THE THORNTON CITY CODE TO ENSURE COMPLETE COMPLIANCE WITH ALL REQUIREMENTS.

  • Where written materials are required, please refer to the Section Titles as stated in the Ordinance along with any number or letter following those Section Titles.
  • Please refer to all categories, even if they do not apply to a particular submittal. Indicate in the application letter that the regulation does not apply for whatever reason.
FACADES
  1. A model is considered different from other models with significantly different floor plans. A home model elevation differs from another home model elevation by incorporating at least three out of the following nine criteria in different ways.
    1. The placement of windows and doors on the front façade elevation (at least a two-foot vertical or horizontal variation in size or location is required).
    2. The use of different materials on the front façade elevation.
    3. The width of the front façade elevation must differ more than two feet.
    4. The locations and proportions of front porches must vary substantially.
    5. The location and proportion of garage doors must vary substantially.
    6. Variations in the front plane and roofline.
    7. Use of roof dormers.
    8. A variation of building types: ranch, two-story and split-level.
    9. Window shapes that are substantially different.

    No model elevation may be repeated more than once every four lots (the first and fourth lots in a row may contain the same model elevation, but the second and third lots must contain two different model elevations. No model elevation shall be repeated directly cross any street from the same model elevation. This requirement will be regulated during the building permit application process.

    Show and list how each model elevation incorporates at least three of the criteria listed above and indicate which models are significantly different from other models and elevations. Use a separate sheet to list (typewritten please) the model elevations and criteria. It is assumed that different models will usually generate significantly different elevations but all models and elevations will be compared, as this is not always the case.

    For example, in this case four criteria are needed to show that each elevation has at least three significant differences from the other elevations:

     

    Model 1A

    Model 1B

    Model 1C

    Criteria 2

    Stucco

    Brick

    Stone

    Criteria 4

    30 SF Porch

    100 SF Porch

    No Porch

    Criteria 5

    Front-loaded Garage

    Front-loaded Garage

    Side-loaded Garage

    Criteria 6

    Gabled Roof

    Hipped Roof

    Gabled Roof

  2. Show graphically and mathematically (provide dimensions) how either 30% or 15% of the first floor front façade elevation (including window and door areas and related trim) is clad in brick, stone, stucco or other approved masonry material. Please list the exact % of masonry on the first floor front elevation for each model elevation.
  3. If less than 30% but at least 15% of the front façade elevation is clad in approved masonry material, list which two or more of the following criteria is included in the design for each model elevation:

    1. All portions of each first floor front façade elevation which extend beyond the primary front wall plane of the home and which are clad in brick, stone, stucco or an approved masonry material shall continue such materials back to the primary front wall plane of the home.
    2. There is at least one front facing roof dormer visible from the street.
    3. The front façade of the home incorporates a covered front porch with roof column supports. The porch shall have a minimum width of five feet and a minimum of 50 square feet of floor area, excluding the stoop.
    4. There is a bay window on the front façade elevation with a minimum of 12 square feet of glass area.

    Include notes of the above on the appropriate elevation drawings.

  4. Regardless of whether the 30% or the 15% masonry requirement is met, the front façade requirements shall also apply to both side façades of each home on a corner lot at least a distance of six feet from the front façade along the side street, or a distance of two feet from the front façade on the garage side of the house. Show this requirement on corner lot elevation drawings. Include notes on the appropriate elevation drawings.

  5. Where side entry garages are attached between the primary front wall plane of the house and the street abutting the principle front yard, show graphically and mathematically that at least 25% of the garage wall plane facing the street is clad in an approved masonry material, and that the wall plane has one of the following:
    1. At least one window.
    2. Architectural relief at least 12 inches in depth across at least 50% of the horizontal distance of the wall panel.

    Include notes of the above on the appropriate elevation drawings.

  6. At least 25% of the homes in each filing shall incorporate a covered front porch with roof column supports. The minimum size of the porch shall be 50 square feet of floor area, excluding the stoop. (This regulation does not apply to duplex units.) List which model elevations meet this requirement. Include notes on the appropriate elevation drawings.
  7. Exposed foundations that extend above grade more than 22 inches shall be covered with a material that is already approved for the home. Show this condition on elevation drawings for walk-out basements or other situations where it might apply.
WINDOWS AND DOORS
  1. Show graphically and mathematically (provide dimensions) how each street facing façade has a minimum window area of 12 square feet of glass area. Any garage, basement or entry door windows cannot be used to satisfy this requirement.
  2. Show graphically and note on the elevation drawings that each window that is not located in a portion of the wall that is clad in masonry has either:
    1. A minimum of four-inch nominal wide wood trim border.
    2. Shutters a minimum of 12-inches wide.

    Include notes of the above on the appropriate elevation drawings.

  3. Window frames other than wood shall be either anodized, electrostatically-painted, vinyl clad or vinyl. Unpainted aluminum window frames are prohibited except for basement windows. Wood frames shall be painted, sealed or stained. Indicate the window frame type by note on the elevation drawings and the application form.
  4. List the design strategy(s) used to emphasize the entrance for each model elevation that does not have a covered front entry porch at least fifty square feet and five feet wide from the front plane of the house (at least one of the following shall be used):
    1. The design of the door.
    2. The design of its surrounding elements.
    3. The inclusion of side-lights (glazed openings to the side of the door) in the entry design.
    4. The location of the front door in a visually prominent location.

    Include notes of the above on the appropriate elevation drawings.

  5. Show graphically and note on the elevation drawings that each door that is not located in a portion of the wall that is clad in masonry has a minimum four-inch nominal wide wood trim border.
ROOFS
  1. At least 90% of the homes within each subdivision shall have a minimum pitch on the predominant roof planes of at least 4:12 (excluding dormers, porch roofs, and other extensions). Note the roof pitch(s) on the elevation drawings and list the predominant roof pitch for each model elevation.
  2. Where asphalt shingles are used, each subdivision filing with between 20 and 50 homes shall use at least two visibly distinct colors of roof materials distributed in roughly equal proportions throughout the development; and each subdivision filing with more than 50 homes shall use at least three visibly distinct colors of roof materials distributed in roughly equal proportions throughout the development. Indicate the different colors with the color and material samples.
  3. All sloped roofs shall include a minimum 12-inch overhang for a 4/12 pitch, a 10-inch overhang for a 5/12 pitch and an 8-inch overhang for a 6/12 pitch beyond each major wall plane of the home. An 8-inch overhang is the minimum overhang allowed. Indicate the overhang dimensions graphically on the elevation drawings.
  4. All rooftop equipment, including without limitation HVAC units, swamp coolers and antennas, shall not be placed on the street facing portion of the roof. This standard does not apply to those items listed in (3)e. Indicate all rooftop equipment graphically on the elevation drawings.
  5. Piping, venting, flashing, solar panel frames, and other rooftop equipment exposed to view shall be finished to match the roof surface color or otherwise designed to blend with the roof surface. Indicate the colors for these items with the material and color samples or in the application letter.
GARAGES
  1. All garages must be built of the same materials as the dwelling unit on the same lot. Indicate compliance with this requirement graphically on the elevation drawings and with the color and material samples.
  2. Carports are prohibited on lots developed with single-family detached homes.
  3. Where front-loaded, three-car garages are used, the plane of one of the garage doors shall be set back at least two feet further from the street than the wall plane of the first two garage doors for at least 50% of the homes with three-car garages. Indicate compliance with this requirement graphically on the floor and site plans for at least 50% of the models with three-car garages or three-car garage options. Include notes on the appropriate elevation drawings.
  4. Show graphically and mathematically that at least 20% of the first floor front façade elevation is clad in brick, stone, stucco, or other approved masonry material if a front-loaded garage is incorporated into a single-family home on a lot that is less than 60-feet wide. Include notes on the appropriate elevation drawings.
  5. On ranch-style homes the area of the first floor front façade elevation shall include the gable ends on the garage if it faces the primary front yard.

REAR FACADES
  1. Where the rear lot line of a single-family or duplex lot abuts a public street and any associated landscaping tract, the highest point of the rear elevation visible from the street shall not be taller than 40 feet above the final grade of the average elevation of the rear property line. The structure may increase in height one foot for every additional foot that it is set back from the setback line. Indicate compliance with this requirement with grade elevations on plot (site) plans submitted with building permits. Show the total height from the rear property line to the top of the proposed model elevation.
QUALITY ENHANCEMENTS STANDARDS
  1. Show and list how each model elevation incorporates at least four of the following features into the design of the home.
  1. Thirty percent of the homes in a subdivision filing with front-loaded garages have the front plane of the garage set back at least two-feet further back than the primary front wall plane or the home or leading plane of a porch.
  2. On lots that are less than 60-feet wide at the front setback line, homes are sited in groups of three or four which have a front setback that differs from the adjacent group by at least two-feet.
  3. All homes in the subdivision have 100% of an approved masonry material on the first floor front façade elevation (excluding window and door areas and related trim).
  4. All the homes in the subdivision have roofs with high profile composition shingles such as slate, tile, shake, dimensional asphalt shingles, etc.
  5. The subdivision filing is designed with alley garages or 50% of the homes are designed with rear garages.
  6. The mailbox kiosk is architecturally integrated into the development.
  7. At least 50% of the homes in a subdivision filing have dormer windows.
  8. At least 50% of the homes in a subdivision filing have a garage door with windows.
  9. All lots in a subdivision filing have an automatic irrigation system in the front yard.
  10. At least 40% of the homes in the subdivision filing shall have a minimum of 2,400 square feet of gross livable area.
  11. No more than 25% of the homes in a subdivision filing are the same models (with distinctly different floor plans).

Indicate the above with appropriate notes and/or drawings of proposed elements.

The applicant is responsible for tracking the above requirements. The Planning Department will not grant building permits if the above requirements are not being met as the subdivision is being built out. The applicant should provide updates of the above requirements with building permits to the Planning Department at every ten percent of a subdivision filing building permits. For example if the subdivision filing has 120 lots, every 12th building permit should include the status of the above requirements with the submitted elevations.

TOWNHOUSE RESIDENTIAL PROJECTS (SECTION B)

  • Section (1) – Required Design Standards
  1. Show how the façades of the townhomes are articulated to differentiate individual units.
  2. Indicate graphically and mathematically that the front and side exterior wall areas of each row or attached cluster of units is composed of one of the following:
    1. At least 25% full-width brick or stone with the balance being any type of lap siding and/or stucco.
    2. At least 60% stucco with the balance being any type of lap siding, brick, stone, or combination thereof.
    3. All stucco, provided there are unique design features in the elevations of the buildings.

    Include notes of the above on the appropriate elevation drawings.

  3. Indicate with site plans that each individual unit has a private outdoor patio or deck area with minimum dimensions of six-feet by ten-feet. Show that the patio area is clearly defined by patio paving, decking, a privacy screen, a three-foot high wall, or landscape screening. Include notes on the appropriate elevation drawings.
  4. No more than eight units may be attached in any single row or cluster.
  5. Show graphically and mathematically that each street facing façade of each unit has a minimum window area of 12 square feet of glass area. The garage, basement or entry door windows cannot be used to satisfy this requirement. Include notes on the appropriate elevation drawings.
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City of Thornton
9500 Civic Center Drive, Thornton, CO 80229