Snoqualmie Remodeling

52.6 percent of Snoqualmie homes were built between 2000 and 2009

Snoqualmie had 4,774 homes in the Census Bureau's five-year survey ending in 2024. Of those, 2,511 were built in the 2000s and another 1,089 in the 2010s, so three in four homes are less than 27 years old. The median year built is 2005. The rest of the stock is much older: 341 homes, 7.1 percent, date from 1939 or earlier. Those two groups need very different remodels. A newer house is mostly about finishes and first system replacements, while a pre-1940 house can bring old wiring, a shallow foundation and, downtown, flood rules.

Source: Census ACS 2020-2024, Year Structure Built, Snoqualmie

Most of downtown Snoqualmie sits in the river's floodplain

The city's annual flood report says most of downtown lies within the floodplain of the Snoqualmie River and floods from time to time. The worst flood in the city's known history came in November 1990, and the most recent major one in January 2009. The hazard comes from the main stem and south fork of the river and from Kimball Creek, which backs up when the river is high. Any development in the floodplain or floodway, not just new buildings, needs a flood improvement permit and possibly an elevation certificate. If a remodel or repair costs 50 percent or more of the building's market value, the whole house must then meet the rules for new construction, which can mean raising it above the base flood elevation.

Source: City of Snoqualmie, Annual Flood Report 2025-2026

Work near the river over $8,504 needs a shoreline permit

Inside Snoqualmie's shoreline jurisdiction, a Shoreline Substantial Development Permit is required before any development whose total cost or fair market value exceeds $8,504, or that materially interferes with normal public use of the water. Some exceptions apply, so call the Planning Division at 425-888-5337 before you plan a deck, addition or grading near the Snoqualmie River. The city also runs a Home Elevation Program to lift houses out of flood reach, and its building staff will visit a property to give advice on flooding, drainage and sewer backflow.

Source: City of Snoqualmie, Annual Flood Report 2025-2026

How much does an ADU cost in Snoqualmie?

A 660 square foot, one-bedroom detached ADU averaged $210,944 in Seattle's 2025 Cost vs Value data. Snoqualmie allows up to two ADUs per lot, each up to 1,000 square feet with one parking space. In the floodplain the unit must sit a foot above the 100-year flood elevation, and none can go in the floodway, which adds foundation cost downtown.

Do I need a permit to build a deck in Snoqualmie?

Not for an uncovered deck that stays within 30 inches of grade and meets setbacks. A covered deck or a higher one needs a permit, filed through MyBuildingPermit. In the floodplain, any development needs a flood improvement permit, so check with the Building Division at 425-888-5435 before building a deck downtown.

Is my Snoqualmie home in the floodplain?

Most of downtown is. The city's flood report says most of downtown lies in the Snoqualmie River floodplain. The Planning Division, at 425-888-5337, can tell you your flood zone, base flood elevation and map panel, and the city holds elevation certificates for homes built or raised since 1988. FEMA's maps are online at msc.fema.gov.

What is the 50 percent rule for flood zone homes in Snoqualmie?

If the cost of a remodel, addition or repair equals or exceeds 50 percent of the building's market value, the house must meet the same rules as new construction. A house damaged that badly must be elevated above the base flood elevation. Plan a large downtown remodel around that threshold, and get an appraisal early.

Do I need a permit for new siding in Snoqualmie?

No. Snoqualmie lists installing or replacing siding as work that needs no permit, along with painting, tile, carpet, cabinets and countertops, fences under 6 feet and uncovered decks within 30 inches of grade. Reroofs, water heater and furnace replacements, and any work in the floodplain do need permits.