They have now done the roofs on our commercial garage and our main office. Both times they were wonderful to work with and did excellent work! Will be using them when our next garage needs to be done in a few years.
Specialty Contractor
ADU Construction in Spokane, WA
T Martin Construction Services builds attached and detached ADUs for Spokane, WA homeowners who need more livable space on their property.
- Adds a fully self-contained living unit with its own kitchen, bath, and sleeping area
- Increases usable square footage without purchasing additional land
- Built to Washington state residential code with proper fire separation and egress
- Supports multi-generational living by keeping family members close but independent
- Adds a rentable unit that can generate ongoing income from your existing property
- Detached and attached options give flexibility based on your lot size and layout
Expert ADU Construction in Spokane, WA
ADU construction in Spokane gives homeowners a practical way to add a fully independent living unit to their existing property. T Martin Construction Services handles the full scope of work, from site evaluation and design coordination to framing, mechanical rough-ins, and final finishes. We build attached ADUs, detached backyard units, and garage conversions. Spokane allows ADUs in all residential and mixed-use zones that permit residential use, and the city has actively loosened restrictions in recent years to make building easier. That means fewer design-matching requirements and no mandatory owner-occupancy rule under current state law. Eastern Washington winters put real stress on building envelopes, so we build to Washington's residential code with insulation, egress, and fire separation done right from the start. Whether you want a rental unit, a space for a family member, or a dedicated guest house, our crew works to code and keeps the process straightforward. Call T Martin Construction Services to talk through what your Spokane lot can support.
What's included
- Adds a fully self-contained living unit with its own kitchen, bath, and sleeping area
- Increases usable square footage without purchasing additional land
- Built to Washington state residential code with proper fire separation and egress
- Supports multi-generational living by keeping family members close but independent
- Adds a rentable unit that can generate ongoing income from your existing property
- Detached and attached options give flexibility based on your lot size and layout
Licensed in Washington and Idaho
Custom lake and mountain home specialist
Full-service construction teams
Barndominium and ADU expert
Site development and excavation
Luxury property management
More Specialty Contractor Services
Need this service?
Get a clear assessment before you commit.
FAQ
ADU Construction FAQ
Common questions about adu construction in Spokane, WA.
Yes, Spokane removed the owner-occupancy requirement, so you do not need to live on site to build an ADU. Washington state law under HB 1337 eliminated that restriction for properties in Spokane.
We build detached backyard units, attached ADUs, and garage or basement conversions in Spokane. The right type depends on your lot size, zoning, and how you plan to use the space.
Spokane allows ADUs up to 1,000 square feet, and the city is updating its code to align with state minimums. Your specific zone and lot size may affect the exact allowable footprint.
Yes, a detached ADU in Spokane must have independent provisions for living, sleeping, cooking, and sanitation. We coordinate utility connections as part of the construction scope.
No, Spokane removed design-matching requirements like matching windows and rooflines when it updated its ADU code in 2022. Your detached or attached unit does not need to mirror the primary home's exterior.
Spokane is required under state law to allow at least two ADUs on a single residential property. We can evaluate your lot and discuss what configurations are feasible for your specific parcel.
Still have questions?
Call us directly. Real answers, no scripts.
Find Us
Proudly Based in ,
Stop by, call, or book online — we're always nearby when you need us.
Phone
(509) 863-5771Hours
- Monday 8:00 AM - 4:30 PM
- Tuesday 8:00 AM - 4:30 PM
- Wednesday 8:00 AM - 4:30 PM
- Thursday 8:00 AM - 4:30 PM
- Friday 8:00 AM - 4:30 PM
- Saturday Closed
- Sunday Closed