Why Lynnwood is one of Snohomish County's best ADU markets
Lynnwood has three structural advantages that make it stand out in the north Puget Sound ADU market. First, the Lynnwood City Center Link light rail station — the terminus of Sound Transit's northern extension — eliminated the off-street parking requirement for ADUs within a half-mile radius, which covers most of the city core. Removing a parking space frees up 180–200 sq ft of lot coverage for the unit itself and cuts $5,000–$10,000 in driveway and curb-cut work. Second, HB 1337 gives every single-family lot the right to two ADUs with no owner-occupancy requirement, effective for Snohomish County cities since May 2025 — meaning you can rent both the main house and the ADU on long-term leases. Third, Lynnwood's job base along Highway 99 and the Alderwood Mall corridor produces consistent rental demand, and 1-bed apartment rents already average $1,775/mo (Zumper Aug 2026) — a new DADU commands a premium above that.
Permitting through Lynnwood Development and Business Services
ADU permits in Lynnwood are handled by the Development and Business Services (DBS) Permit Center at Lynnwood City Hall (19100 44th Ave W). The city uses an online permit portal for electronic plan submittals, with a comment-response cycle for revisions. Lynnwood's ADU code (LMC Title 21) is being updated to fully align with HB 1337; under state law, two ADUs per lot and no owner-occupancy are now the controlling standard regardless of any older local-code provisions.
Lynnwood is also developing a pre-approved DADU plan program — modeled on Seattle's ADUniverse — with a plan submission window open from May 20 through July 2, 2026. Once approved plans are selected, homeowners who choose one will see a meaningfully shorter permit review cycle because the architectural and structural design is pre-cleared. We monitor the program rollout and can advise on whether a pre-approved plan fits your lot during feasibility.
We handle the building, mechanical, electrical, plumbing, and side-sewer permits as one coordinated package, and confirm whether your lot falls inside the half-mile transit radius that waives the parking requirement before we finalize the site plan.
Lynnwood neighborhoods we build in
Alderwood Manor, Martha Lake, Picnic Point–North Lynnwood, Cedar Valley, and the neighborhoods surrounding the Lynnwood City Center light rail station. Lots in Alderwood Manor and Martha Lake tend to be wider and deeper than the city core — good for single-story 800–1,000 sq ft DADUs along the rear property line. Closer to the light rail station, narrower lots and the half-mile parking waiver favor two-story designs that maximize square footage within the setback envelope.
What we deliver
Design, Lynnwood DBS permitting, full construction, utility connections, and certificate of occupancy — all on one fixed-price contract with no cost-plus surprises. See our full services list or request a free Lynnwood feasibility review.
We also serve nearby cities
Building outside Lynnwood? We also serve Everett ADU builders, Seattle ADU builders, and Tacoma ADU builders — see all service areas.
Lynnwood ADU FAQs
Can I build a DADU on my Lynnwood lot?
Yes. Under Washington's HB 1337, every single-family lot in Lynnwood can host two ADUs — attached, detached, or a combination — with no owner-occupancy requirement. DADUs are allowed up to 1,000 sq ft under the state standard. You need a building permit through Lynnwood's Development and Business Services Permit Center, and we handle the full submission, correction cycles, and inspections as part of a single fixed-price contract.
Does the Lynnwood Link light rail station affect my ADU parking requirements?
Yes — in your favor. Under HB 1337, no off-street parking can be required for an ADU within a half mile of a major transit stop. The Lynnwood City Center Link light rail station qualifies, and the half-mile radius covers most of the city core. If your lot falls inside it, you are exempt from the ADU parking requirement entirely — freeing up lot coverage for the unit itself and eliminating driveway and curb-cut costs.
Does Lynnwood have pre-approved DADU plans?
Lynnwood is actively developing a pre-approved DADU plan program, with a submission window open from May 20 through July 2, 2026 for architects, designers, and builders to submit plans for consideration. Once the city selects and publishes approved plan sets, homeowners who choose one should see a shorter permit review cycle because the design is pre-cleared. We track the program rollout and can advise on whether a pre-approved plan fits your lot.
How many ADUs can I build on my lot in Lynnwood, WA in 2026?
In Lynnwood, Washington's HB 1337 gives every single-family lot the right to two ADUs — attached, detached, or a combination. Lynnwood applies HB 1337: two ADUs per lot, no owner-occupancy, and no parking required within a half mile of the Lynnwood Link light rail station — which covers most of the city core.
Do I have to live on the property to rent out my Lynnwood ADU?
No. HB 1337 removed statewide owner-occupancy requirements, including in Lynnwood. You can rent both the main home and the ADU on long-term leases. Short-term rentals remain separately regulated.