Home Remodeling Contractors in Mountlake Terrace, WA

The Community Development Department issues building permits, and applications, fees and inspection requests all go through the city's online Permit Portal. The city no longer takes inspection requests by phone. Permit staff work Monday from 8:00 to 3:00 and Tuesday through Thursday from 8:00 to 4:00, and the permit desk is closed on Fridays.

The city publishes its typical review times: a residential building permit takes 4 to 6 weeks from submittal to first comments, revisions take about 2 weeks, and over the counter permits are issued the same day. A permit expires if no inspection is made within 180 days, and each passed inspection extends it by another 180 days.

For simple interiors the city offers a Minor Residential Remodel Permit without plan review. One permit can cover up to three spaces, such as two bathrooms and a kitchen, provided the work keeps the existing walls and layout and changes no framing. Moving a wall or changing a room's layout still goes through full plan review.

Mountlake Terrace asks for a hazardous materials survey with most remodel applications. When a project removes 120 square feet or more of material, the application must include the survey and proof that it was submitted to the Puget Sound Clean Air Agency, and if asbestos is found, the final abatement report as well.

About 66 acres of 101 acre Lake Ballinger lie inside Mountlake Terrace, with the rest in Edmonds, along with all of Ballinger Island and about 1.2 miles of shoreline. Hall Creek supplies about two thirds of the water flowing into the lake, and McAleer Creek drains it to the east. The city's shoreline program designates the lakefront homes as shoreline residential, and the north and east shores as urban conservancy.

The city's shoreline inventory records that homes and yards beside the lake flood in large storms, as they did in December 2007. Mountlake Terrace joined the National Flood Insurance Program in 1980, maps only Zone A flood hazard areas, and updated its floodplain rules (MTMC chapter 16.18) in 2025.

Mountlake Terrace sits on the highest ground in southwest Snohomish County, rising from 263 feet at its southeast corner to 528 feet at the city water towers. The Hall Creek depression and Lake Ballinger form its western edge, and the ravine of Lyon Creek East marks the eastern edge toward Brier, with the west branch of Lyon Creek cutting its own ravine through the city. The city's environmental review calls the steep slopes on the east and west flanks unstable for building.

Both branches of Lyon Creek are state priority habitat, and coho and cutthroat use Lyon Creek and the Hall and McAleer creek system. The city warns that its critical area map is a guide and is not field verified, so a critical area counts wherever it is found on the ground.

Each ADU in Mountlake Terrace must be between 200 and 1,000 square feet, not counting a garage, and it can sit inside the house, be attached to it, or stand on its own as a DADU. Adding one ADU may raise the lot's total floor area by 1,000 square feet and two by 2,000, even past the usual floor area and lot coverage limits. An existing garage may be converted even when it does not meet current setbacks, and no setback applies along an alley.

Each unit needs its own utilities under MTMC 15.05.330, and no street improvements are required when the house is already there. The city's ADU checklist asks for a site plan with 2 foot contours and any critical areas and buffers, plus a drainage report once new hard surface passes 2,000 square feet. Its permit FAQ also says a contractor must do the work when a homeowner creates an ADU.

After World War II and the Korean War, developers built groups of small houses here for returning veterans, and the community incorporated in 1954. Interstate 5 was cut through the middle of the city in the early 1960s. Census Bureau estimates for 2020 to 2024 put the median home's construction year at 1973, with the 1950s and 1960s together accounting for about 44 percent of all housing and about six in ten homes built before 1980.

Roughly half of the city's homes are detached single-family houses, and about 57 percent of occupied homes are lived in by their owners. In a compact postwar house, a kitchen or bath remodel often means reworking original wiring, drain lines and insulation, so we price that work line by line in writing before it begins.