Room Additions

Cowlitz County Government, Washington State

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EPIC

Cowlitz County
Department of Building and Planning
207 4th Avenue North, Kelso, WA 98626
Tel: 360-577-3052
Fax: 360-414-5550

Hours:
8:00am - 5:00pm
Monday-Friday

DOCUMENT SUBMITTAL FOR ROOM ADDITIONS

Purpose: Building permits are required for all additions to structures. This includes additions to living area as well as non-habitable space, porches, covered patios, storage sheds and similar uses. When applying for a permit, you will need to provide two sets of plans detailing your proposed project.

Code Reference: Cowlitz County Code 16.05, International Building Code, International Residential Code, International Mechanical Code, Uniform Plumbing Code, Washington State Indoor Air Quality Code, Washington State Energy Code, International Fire Code.

Submittal Requirements:

Indicates an item which is always required

Indicates an item which may be required, depending on the project. A staff person can help you
with each item required for your application.

I. Document Submittal List

A. Drawings: (3) sets of:

1. Plot Plan to include:

        a. Lot Dimensions, showing whole parcel
        b. Building Footprint with all Projections and Dimensions to Property Lines
        c. North Arrow
        d. Locate Existing structures on the property including well and septic systems.
        e. Easement(s)

2. Grading Plan to show:

        a. Existing and Proposed Grading
        b. Pad Elevations, Ground Slope, Drainage Scheme and Topographic Plan Drawn to 1'-0"
            Contours
        c. Retaining Walls and Drainage Systems, Existing and Proposed

3. Architectural Plans to include: (include all that will apply to your project)

        a. Foundation and Floor Framing Plans
        b. Architectural Floor Plan(s)
        c. Exterior Elevations
        d. Architectural Details (see item II, B below)
        e. Truss Configurations and Locations
        f. Typical Cross Sections in Each Direction (where necessary)
        g. Roof Plan

4. Structural Plans to include: (include all that will apply to your project)

        a. Foundation Plan
        b. Floor Framing Plan(s)
        c. Roof Framing Plan
        d. Truss Information (see item II, C)
        e. Cross Sections as necessary
        f. Framing Details
        g. Structural Material Specifications

5. HVAC/Plumbing *

a. Show HVAC equipment and plumbing fixtures
b. Smoke detector locations

6. Electrical Plan *

a. Outlets, Fixtures, Switches, Smoke Detectors, and Service Panels.

B. Calculations (2) sets of:

1. Structural Calculations

2. Energy Calculations and Forms

C. Other Documents

1. Soils Report or Geologic Study
2. Proof of potable water availability (approved on-site well, or public system availability letter)
3. Plan and site review fees are due at time of application submittal.

II. Information to be Included on Documents

A. Information on plans:

1. Name, title, registration (address and phone number) of design professional

2. Address of property and name, address, phone number of the property owner

3. Cover Sheet Information:

        a. Applicable codes and editions
        b. Description and type of all work
        c. Occupancy and type of construction
        d. Gross area, by floor(s) and building height
        e. Index of drawing information
        f. Project address.

B. (#)Details included in plans: (include all that will apply to your project)

1. Windows: head, jamb and sill heights

2. Exterior doors: head, jamb and threshold

3. Flashing: vertical junctures of materials

4. Fireplace - masonry or prefabricated fireplace

5. Footing, piers and grade beams

6. Roof: eaves, overhangs, rakes and gables

7. Floor changes (i.e., wood to concrete)

8. Handrail(s) and guardrail(s) with support

9. Structural wall sections with details at foundation, floor and roof levels

10. Stairway rise and run, framing, attachment and dimensions of members

11. Connections (post & beam, etc.)

12. Any special framing details

C. Prefabricated trusses: provide (Item 1or 2)

1. Submit following:

        a. Roof Framing Plan with Truss I.D. No. and Manufacturer's Name
        b. Detail of all Truss Splices, Connections and Plate Sizes
        c. Show all Trusses including Gable Bracing and Bridge
        d. Review by Individual Responsible for Design

2. Provide Single Line Truss Diagram with All Vertical and Lateral Loads including Bearing Points
Shown with Reference of Framing Plan

D. Separate Plans &Permits Required for the Following Types of Work **

1. Automatic Fire Sprinkler Systems

2. Electrical Work

3. Septic repair or expansion.

4. Proof of Water Availability.

(*) Plans can be combined for simple buildings, if clarity is maintained.

(**) This is not a complete list of all required submittals, your project may require additional
information after plan review.