Residential Submittal Requirements

Submittal Requirements for Residential Remodel Projects

Applicable codes are required to be notated on plans. Building Codes, Amendments & Division Policies

In order for your permit application to be reviewed and processed properly, the following construction information must be provided. Note: “Preliminary” and/or plans shown as “Not for Construction” or similar are unacceptable.

***All documents are required to be submitted electronically***

Address

• Include the project address on each document.

Architectural Plans

Provide an existing floor plan including a north arrow.

Provide a proposed floor plan that includes the following:

  • North arrow.

  • Size, span, and spacing of all structural and framing members.

    - Note: Any alteration of the foundation or structural components requires a plan or detailed drawing stamped by a structural engineer at the time of permit application.

    - The engineer of record, or their representative, must inspect and verify the alteration to the foundation prior to final approval by the Building Division.

  • Use, location, and size of all rooms.

  • Ceiling height of each room (from finished floor to finished ceiling).

  • Size, location, and type of all doors and windows.

  • Size and location of all stairways, including:

    - Rise and run of steps,

    - Handrail details, and

    - Headroom clearance.

  • Location and construction type of all fire-rated walls and ceilings, where applicable.

  • For basement finishes, include:

    - Location of beams and ductwork,

    - Height from finished floor to the bottom of beams and/or ductwork,

    - Note: Any alteration of foundation or structural components follows the same requirements listed above.

Electrical Plans

• Provide a layout showing the location of:

  - Electrical receptacles,

  - Switches,

  - Lighting fixtures,

  - Smoke alarms,

  - Ventilation fans, and

  - Location and size of the electrical service.

Plumbing & Mechanical Plans

• Provide plans showing the size and location of all plumbing and mechanical fixtures and appliances.

• Provide Manual J, S, and D calculations if:

  - The heating system is being replaced, or

  - Ductwork is being replaced, relocated, or otherwise altered.

Energy Conservation Code

• Compliance with the International Energy Conservation Code (IECC) may be required depending on the scope of work. Projects that impact the thermal envelope, mechanical, or electrical systems may need additional documentation showing compliance with the IECC.

Resubmittals / Revisions

• Include a written narrative response explaining each revision made.

  - Identify each revision by page number, section, or detail number.

• Submit full-page replacements for each revised page.

  - Clearly mark all changes on each revised page.

• Upload required documents through the eTRAKiT portal:

  1. Sign in to your account.

  2. Go to My Dashboard.

  3. Click on My Active Permits.

  4. Select the relevant permit number and address.

  5. Click Attachments, then Accept to upload documents.

     - Important: Make sure filenames do not contain special characters.

• After uploading, email permits@littletonco.gov  and reference the permit number and job address to confirm submission.

 

 

Submittal Requirements for New Single-Family, Townhouse, Two-Family Dwelling, Additions, and ADUs

Applicable codes are required to be notated on plans. Building Codes, Amendments & Division Policies

In order for your permit application to be reviewed and processed properly, the following construction information must be provided. Note: “Preliminary” and/or plans shown as “Not for Construction” or similar are unacceptable.

***All documents are required to be submitted electronically***

Address

• Provide project address on each document

Site Plan

• Provide North Arrow

• Provide site plan that shows dimensions reflecting the distances to property lines.

• Indicate all public or private easements.

• Show location of all proposed and existing structures with dimensions.

• Provide landscaping plan.

Structural Plans

Plans must be stamped and signed by a Licensed Colorado Structural Engineer.

• Indicate size, location, and method of reinforcement for all proposed and modified footings, column pads, piers, caissons, grade beams, and foundation walls. Specify location of reinforcing steel and anchor bolts.

• Provide complete and clearly dimensioned floor framing plan for each level and roofing framing plan which indicates the materials, types, sizes, and location of all structural elements.

• Provide complete structural design criteria including but not limited to required design loads, material specifications, and structural construction requirements.

Architectural Plans

Plans must be stamped and signed by a Colorado Design Professional.

• Provide complete and dimensioned floor layout at each level which identifies the use of each room.

• Provide complete and dimensioned roof plan and indicate all roof slopes.

• Provide complete and dimensioned reflected ceiling plan.

• Provide exterior elevation for each side of building which contains clearly dimensioned overall building height, dimensions from finished grade, dimensions from finished floor, and indicate location, size and types of all doors and glazed openings.

• Provide building and wall sections which clearly identify the required type and location of all materials for construction of beams, columns, floors, walls, ceilings, and roofs.

• Provide stair geometry. Include rise and run, handrail and guardrail heights and details.

• Provide one major section through the exterior wall from footings to the highest part of the roof (min. scale ¼” = 1’).

• Provide square foot area breakdown per floor level.

Electrical Plans

Not required to be stamped.

• Provide electrical plans showing the location and capacity of the service equipment and electrical panels; the location of all smoke detectors, electrical receptacles, switches, and lighting fixtures.

Mechanical Plans

Not required to be stamped.

• Provide mechanical plans and indicate location of all heating, ventilating, and air conditioning equipment.

• Provide Manual J, Manual D, and S calculations - must be legible.

Plumbing Plans

Not required to be stamped.

• Provide plumbing plans and indicate location of all plumbing fixtures and appliances. (Isometric may be required per the discretion of the plan examiner).

• Provide supply line size and main discharge size. Note water supply inlet location.

• Indicate whether appliances are gas-operated, electric, or otherwise. List types of material to be used for all water supply, drainage, and vent piping.

• Gas load calculations and piping diagram is required for gas appliances and must be legible.

Energy Conservation Plans

• Identification of the location of the continuous thermal envelope around the building. Include identification of the air barrier.

• Provide detailed information sufficient to demonstrate compliance with one of the following energy paths:

  - Prescriptive R-Value / U-Factor;

  - Prescriptive Component Performance Alternative;

  - Simulated Building Performance; or

  - Energy Rating Index.

• Identify project compliance path:

  - Prescriptive R-Value/U-Factor;

  - Prescriptive Component Performance Alternative;

  - Simulated Building Performance; or

  - Energy Rating Index.

CD Engineering

Contact Community Development Engineering Division 303-795-3868 for questions regarding: Grading, Right of Way, Sewer, Traffic, and Floodplain.

  • Denver Water Fees/Application: 303-893-2444
  • New Sewer Tap; Size; Existing Sewer Tap?

• If new sewer tap is required, use the property address to identify the Sanitation District. The Sanitation District is paid first, then City of Littleton.

Use this link to verify Sanitation District: Sewer, Water, Storm District Map 

Residential Rooftop Solar and ESS Requirements

Applicable codes are required to be notated on plans. Building Codes, Amendments & Division Policies

In order for your permit application to be reviewed and processed properly, the following construction information must be provided. Note: “Preliminary” and/or plans shown as “Not for Construction” or similar are unacceptable.

***All documents are required to be submitted electronically***

These requirements pertain only to residential photovoltaic (PV) energy systems and energy storage systems administered by Littleton’s Building and Code Compliance Division. Additional permits, permissions, authorizations, fees, inspections, etc. may be required by other Littleton departments and/or outside authorities having jurisdiction.
All components of a project, such as design, fabrication, installation, and construction, shall comply with City of Littleton’s adopted building codes, ordinances, amendments, and Building and Code Compliance Division policies.

Address

• Include the project address on each document.

Common Design Considerations

Littleton Design Criteria

• Littleton’s design wind speed is 136 mph.

• Ground snow loads shall be assumed to be 38 pounds-per-square foot minimum.

Pathways and Setbacks

• In the case of townhouses and multi-family buildings, the photovoltaic system, pathways, and setbacks shall be restricted to the roof area allocated to the individual dwelling unit. It is not permissible to fill your townhouse rooftop with photovoltaic panels and consider your neighbor’s abutting rooftop as providing the required pathway.

Electrical & ESS

• Photovoltaic panels and modules shall be listed and labeled in accordance with UL 1703 or with both UL 61730-1 and UL 61730-2.

• Inverters shall be listed and labeled in accordance with UL 1741.

• Systems connected to the utility grid shall use inverters listed for utility interaction.

• Any exposed grounding conductors on the roof shall be 6 AWG copper or larger. (NEC 250.120(C))

• If the existing grounding system consists of a single rod, pipe, or plate electrode, a supplemental grounding electrode must be provided. Electrodes shall be spaced at least 6' apart. (IRC E3608.4)

• Energy storage systems (ESS) shall be listed and labeled in accordance with UL 9540 and installed per IRC R328.4, the NEC, and Littleton amendments.

• ESS shall be installed only in the following locations:

  - Detached garages and detached accessory structures.

  - Attached garages separated from the dwelling unit living space.

  - Outdoors or on the exterior side of exterior walls located at least 3’ from doors and windows directly entering the dwelling unit.

  - Enclosed utility closets, basements, storage, or utility spaces within dwelling units with finished or noncombustible walls and ceilings. Walls and ceilings of unfinished wood-framed construction shall be provided with not less than 5/8” Type X gypsum wallboard.

• ESS shall not be installed in sleeping rooms or closets or spaces opening directly into sleeping rooms.

• ESS located inside of dwelling units, basements, and attached garages shall be provided with interconnected smoke alarms or heat detectors, as appropriate.

• ESS shall be provided with the required warning labels, operation and maintenance manuals, and contact information for qualified maintenance and service providers.

Structural Design Documents

• A digitally stamped and signed letter from a State of Colorado-registered Structural Engineer shall be submitted as part of the Building Permit Application process. Such a letter shall clearly state that the Structural Professional Engineer has evaluated the existing, non-concealed elements of the structure, considered the proposed photovoltaic system improvements, and Littleton design criteria, and either verifies that no structural modifications are required or provides the design for such required structural modifications.

• All sheets within the project drawing set that contain structural design or related information shall be digitally stamped and signed by a State of Colorado-registered Structural Engineer.

Electrical Design Documents

• All sheets within the project drawing set that contain electrical design or related information shall be digitally stamped and signed by a State of Colorado-registered Electrical Engineer.

• Electrical sheets should at least provide the following information:

  - A cover sheet with basic project info: project address, location map, designer/installer/contractor contact info, system capacity in DC and AC, utility interconnection status, ESS presence, etc.

  - A dimensioned site plan showing property layout, solar array, required pathways/setbacks, and associated equipment like power storage, disconnects, panels, meters, etc.

  - One- and/or three-line diagrams providing schematic design of the entire photovoltaic system and wiring.

  - A roof attachment diagram showing how panels/modules attach to the existing roof.

  - Required warning labels shown on the plans.

  - Calculations and details necessary to demonstrate compliance with the National Electrical Code as adopted by the City of Littleton.

Contractor Requirements

• Contractors and installers must be licensed to perform photovoltaic and electrical work within the City of Littleton.

• Please Note: Only 25% of panels may be installed prior to rough frame and rough electrical inspection.

 

 

Residential Gas Line Submittal Requirements

Applicable codes are required to be notated on plans. Building Codes, Amendments & Division Policies

In order for your permit application to be reviewed and processed properly, the following construction information must be provided. Note: “Preliminary” and/or plans shown as “Not for Construction” or similar are unacceptable.

***All documents are required to be submitted electronically***

Gas pipe isometric drawings are required. Drawings shall provide the following information:

• Provide project address on each document

• Incoming pressure and pressure drop at the meter/regulator.

• BTU demand of each appliance served by the piping system.

• Type of piping material being used within the piping system (e.g., polyethylene, PS-2, schedule 40 steel, CSST, etc.).

• Pipe diameter and length for each section of piping within the diagram.

• The location of all shut-off valves.

• Burial depth of all underground piping.

***NOTE: The pressure test shall be conducted at a minimum of 10 psig (pounds per square inch gauge). The test duration shall be a minimum of 15 minutes.***

 

 

Residential Egress Windows and Well

Applicable codes are required to be notated on plans. Building Codes, Amendments & Division Policies

In order for your permit application to be reviewed and processed properly, the following construction information must be provided. Note: “Preliminary” and/or plans shown as “Not for Construction” or similar are unacceptable.

***All documents are required to be submitted electronically***

• Include the project address on each document.

Provide a floorplan showing where the new or altered Emergency Escape and Rescue Opening(s) will be located.  Include North Arrow on floorplan.

• Provide a design that has been stamped by a Colorado-licensed Professional Engineer for any alteration to the foundation system, basement wall section, beams, headers, or any other structural elements.

• Basements in dwelling units and every sleeping room below the fourth story shall have at least one emergency escape and rescue window or door opening directly to an approved outside location.

• The door or window shall be openable from the inside without the use of keys, tools, or special knowledge.

• The finished sill height of 44” is measured from the interior finished floor level.

• The minimum net clear openable area is 5.7 square feet. (Exception: The minimum net clear area may be reduced to no less than 5.0 square feet on grade-floor emergency escape and rescue openings.)

• The minimum net clear openable area height dimension shall be 24”.

• The minimum net clear openable area width dimension shall be 20”.

• Egress windows with a finished sill height below the adjacent ground elevation shall be provided with a window well. A minimum accessible net clear opening of 9 square feet with a minimum dimension of 36” shall be provided.

• Window wells with a vertical depth of more than 44” shall be equipped with an approved permanently affixed ladder or stairs that are accessible with the window in the fully open position.

• The ladder or stairs shall not encroach into the required dimensions of the window well more than 6”.

• Bars, grilles, grates, or similar devices may be installed on egress windows, doors, or window wells provided that the devices are equipped with approved release mechanisms which are openable from the inside without the use of a key or special knowledge or effort.

• Where an existing emergency escape and rescue opening is replaced, it shall be brought into full compliance with the requirements for new construction.

Note:   Inspection by the Engineer of Record or their representative is required to be performed and verified to the Building Division prior to final approval of the project.