Residential Construction Plan Requirements
Planning & Development Services · 1800 Continental Place · Mount Vernon WA 98273
voice 360-416-1320 · inspections 360-416-1330 · www.skagitcounty.net/planning
For the fastest review, construction plans for residences should include all of the following information in the order shown. Small deviations are ok.
Code Summary and General Notes
• Identify version/edition of the building code
• Identify building areas – square footage of home, garage, decks,
patios, etc.
• Energy code information and credits
Elevation Plans
• A view of each side of the building (label N, S, E, W)
• All windows and doors
• Elevation measurements—show existing grade, floor height, top
of wall, top of roof
• If lot is sloped, show lower and upper grade. Elevations should
reflect the topography of the building site.
• Pitch of roof
• Type of finishes (siding, brick or stone, roofing, soffit)
• Base flood elevation and finished floor height, if in the floodplain
Floor Plan (each story or level)
• Room names
• Decks, porches, and patios along with steps
• Cabinets
• Measurements of exterior of building and interior rooms
dimensions to scale
• Exterior and interior wall widths
• Door and window locations (with sizes and types)
• Plumbing fixture locations (toilets, sinks, tubs, showers,
dishwasher, washer, water heater)
• Mechanical devices (heating system, bath fans, kitchen fan,
dryer, whole-house ventilation system)
• Smoke detectors and carbon monoxide detector
• Stairs—See Detail requirements below
• Fireplace—note gas or wood
• Attic access—location and size
• Headers supporting roof—list type and size
• Window and door headers (for lower floor, if applicable)
Foundation Plan
• Footing size (width and thickness)
• Wall size (width and height)
• Rebar placement for wall footing and walls (horizontal and
vertical)
• Foundation bolt size and spacing along with square washers
• Foundation vents size and location placement
• Flood openings, including calculations if applicable
• Hold-downs—type and location placement
• If slab on grade, vapor barrier and R-10 insulation
Floor Framing Plan
• Supports for floor joist framed pony wall or post and beam
(show size and spacing)
• Floor joist size, span and spacing
• Blocking and connections (e.g., joist hangers, post brackets)
• Sheathing type
• Location of interior point loads
Roof Framing Plan
• Truss or stick framing layout
• Ventilation requirements for roof
Wall Bracing Plan
• Plan for each story showing either:
• Engineering—name each wall line for exterior walls and
interior walls; or
• Prescriptive framed panels—provide type of bracing
method, minimum wall length for wind and seismic, hold-
down requirements and footing requirements for interior
braced wall panels. See the
Simpson Wall Bracing
Calculator for more info.
• Location of hold downs
Wall Cross Sections
• Exterior wall (from foundation to roof)
• Wall—bottom plate, stud, top plates, sheathing,
insulation,
• Base flood elevation, finish floor elevation, type of
materials used, if in the floodplain
Details
• Header framing method with insulation
• Flashing for windows and doors
• Waterproofing
• Ventilation
• Step foundation detail
• Pony or cripple wall detail
• Stair detail, including head height, rise, run and railing
information
• Deck to wall—Ledger, bolting requirements, joist size and span,
joist hangers, lateral attachment, flashing
• Deck to roof—footing size and rebar, post bracket, post, post to
beam attachment, beam size and spacing
• Foundation—listing footing and wall size, rebar size and
placement, bolt size and placement, plate
• Floor—joist size, sheet size, insulation
• Roof—framing, sheeting, roofing, soffit, insulation
Building Permit Application