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A Guide for Home Builders

Step 7: Inspection

inspection iconBuilding Inspectors conduct inspections at various stages of construction, and keep records on file for future reference. Beyond the immediate role of ensuring safe construction, these inspection records provide verification of no longer visible building elements located within a building or structure. Lending institutions, appraisers, lawyers and others can then rely upon these files in determining the value of a building.

Is my building inspection scheduled? When will they be there?

After 7:15 a.m. on the day of your inspection, you can verify that the inspection is on the list and see what time range the inspector will be there by clicking this link.   You may need to clear your cache or browser history.  To do that, the fastest way is a short cut.

1.     Press all the keys [Ctrl], [Shift] and [del] on your Keyboard.

2.     Different Browsers will have different options.

3.     Pick the option that will clear the browsing history for the Thurston County Website.

Times are an estimate only. The inspector may run later or arrive earlier than shown. 

Please allow an extra hour if you are at the end or beginning of any time period.

To reschedule, call 360 786-5489 between 7:15-8:00 a.m., press zero to speak with an inspector.

How to Request an Inspection

To request an inspection call our Building Inspection Request Line

Before requesting an inspection, all property corners must be clearly marked. To speak directly with a building inspector, please call between 7:00 a.m. and 8:00 a.m. Monday through Friday.

Alternatives to a Site Visits for Certain Inspections

A new program for electronic inspections is being offered for minor work; corrections; some footings; ductless heat pump and heat pump installations; gas-test; slab insulation; smoke and co2 detector installations; as well as other minor inspections.

See the Electronic Inspections Instructions for more information. If you have questions contact the Building Services Supervisor at (360)786-5466 or email building@co.thurston.wa.us.

What the Inspector Will Check During the Final Residential Building Inspection

To see a checklist for the final residential building inspection, click here.

Inspection Certification Forms

Gas Line Pressure Test Verification

Plumbing Water/Air Test Verification

When to Request Inspections

  • inspectorFooting and Setback Inspections: Excavation for footings should be complete, and all required reinforcing steel should be in place. Any required forms and all bedding materials for an all-weather wood foundation system should be in place.
  • Foundation Wall Inspection: Request this inspection after all forms and required reinforcement, foundation vents and access openings are properly installed, but before concrete placement.
  • Concrete Slab Inspection: Request this inspection after all in-slab building service equipment, conduit, piping accessories and other ancillary equipment are in place, but before concrete placement. Please note: this inspection is required only if any of the above in- or under- slab items were installed.
  • Wall Nailing/Shear Inspection: Request this inspection after all framing members have been installed in the area where shear wall panels or lateral restraint panels have been installed.  Required hold-downs and strapping must be in place and all nailing completed.  No covering (installing siding, insulation, wallboard, etc.) may begin until this inspection is done.
  • Electrical Inspection: All electrical wiring and hardware must be approved for cover and service by the Washington State Department of Labor and Industries Electrical Inspection Division. You should request this inspection by calling (360) 902-5799. Your Electrical Inspection must be approved before requesting a Framing Inspection.
  • Plumbing Rough-In Inspection: Request this inspection after all drain, waste, vent and water supply piping is installed and during water or air pressure testing. This inspection may be approved before or at the same time as the Framing Inspection.
  •  Mechanical Rough-In Inspection: Request this inspection after all mechanical equipment and ducting (including bath fans, range hood – if ducted, gas piping and wood stove chimney(s) are installed and during air pressure testing of the gas pipes. This inspection may be approved before or at the same time as the Framing Inspection.
  •  Propane Tank Inspection: Request this inspection if you have installed a propane tank that is 500 gallons or more (no permit is required for propane tanks that are less than 500 gallons). This inspection may be approved during the mechanical rough-in inspection.
  •  Framing Inspection: Request this inspection after the roof, all framing, fire blocking, windows, chimneys, exterior siding and bracing are in place; all plumbing, mechanical and electrical are approved for cover; and energy code caulking and sealing are done.
  •  Insulation Inspection: Request this inspection after all concealed areas (walls, cathedral ceilings, etc.) are insulated, but before covering. Accessible attics and under-floor areas will be inspected during the Final Inspection.
  •  Gypsum Board Inspection: Request this inspection after all interior and exterior gypsum board is in place, but before plastering is done or gypsum board joints and fasteners are taped and finished. This is not required if it is a braced wall.
  •  Final Electrical Inspection: After all electrical trim and appliances are installed, call the Washington State Department of Labor and Industries at (360)902-5242 for a Final Electrical.
  •  Final Access Inspection: When your driveway is installed, call Thurston County Development Review/Public Works at (360) 867-2050 for a final inspection.
  •  Final Inspection: Request this inspection after the grading is done, the septic as-built drawing is approved, and the home is ready for occupancy. The address that is clearly legible from the road should be posted.

Certificate of Final Approval

When all required inspections have been completed and approved, you will receive a Certificate of Final Inspection. Your new home is now ready for occupancy. Ask the building inspector approving the final inspection of your home to give you the County copy of your approved Building Plans. Please keep these plans, your Certificate of Final Inspection, your permit card and other permit and construction documents in a safe place for future reference. If you decide to remodel or build an addition onto your home, these documents will serve as a record of what was constructed on your site and as a useful reference for your designer or builder. CONGRATULATIONS!

If you have questions, please call the Building Services Supervisor at (360) 786-5466 or please email building@co.thurston.wa.us.


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