Typical Lot Size
5,000 – 7,500
sq ft
Max ADUs
2
per lot
Permit Type
Standard Building Permit (Seattle DCI)
Timeline
6 – 10 weeks
Median Home Price
$750K – $1.0M
Est. ADU Rent
$2,100 – $2,900/mo
Neighborhood Overview
Greenwood is an affordable, walkable northwest Seattle neighborhood with practical 5,000–7,500 sq ft lots and RapidRide E Line access. Its value pricing and steady demand make it one of the city's most accessible entry points for ADU construction.
Greenwood is a friendly, down-to-earth northwest Seattle neighborhood with a walkable commercial core along Greenwood Avenue North, lined with bakeries, taverns, and antique shops. Blending into adjacent Phinney Ridge, the area features classic bungalows and mid-century homes on practical 5,000–7,500 sq ft lots, many with alley access. Greenwood offers more affordable home prices than Ballard or Fremont while keeping similar northwest Seattle walkability and charm, making it a popular entry point for first-time ADU builders. The RapidRide E Line on Aurora Avenue to the east provides frequent transit, and the neighborhood's steady demand from young families and professionals keeps ADU rentals reliably occupied.
Greenwood lots typically run 5,000–7,500 sq ft with frequent alley access, making them practical for detached ADUs as well as attached and basement conversions. Standard 5,000 sq ft lots are common on the platted grid.
ADU Construction Allowed
Greenwood qualifies for ADU construction under Seattle's ADU ordinance (SMC 23.44.041) and Washington's HB 1337.
- Detached ADUs (DADUs) allowed
- Attached ADUs allowed (basement, addition, above-garage)
- Up to 2 ADUs per lot
- Parking exempt (near transit)
Transit routes: RapidRide E Line (Aurora Ave N), Metro Route 5, Metro Route 45
Why Build an ADU in Greenwood
- Affordable NW Seattle entry point ($750K–$1.0M) with strong walkability
- Practical 5,000–7,500 sq ft lots with frequent alley access for DADUs
- RapidRide E Line on Aurora corridor qualifies many lots for parking exemption
- Steady rental demand from young families and professionals — reliable occupancy
- Up to 2 ADUs per lot under CB 119544; HB 1337 protects DADUs to 1,000 sq ft
Special Considerations
Transit exemption varies by distance
East-side lots near the RapidRide E Line on Aurora qualify for the parking exemption; lots farther west may need to verify status or provide a space.
Standard-lot footprint planning
On 5,000 sq ft lots, careful management of lot coverage and rear-yard setbacks maximizes DADU size; alley access helps significantly.
Exceptional trees
Established lots may have trees over 24" DBH requiring a separate removal permit.
Permit and impact fees
Budget $20,000–$50,000 in Seattle DCI fees on top of construction.
Learn more about ADU regulations: Review Seattle ADU laws, understand the permitting process, or see the complete cost breakdown for King County.
Explore ADU options: Compare detached ADUs, attached ADUs, garage conversions, and basement conversions. Not sure which? Read our DADU vs ADU comparison.
Planning resources: Financing options, rental income estimates, ROI analysis, and the complete building checklist.
Ready to get started? Our free feasibility study analyzes your specific parcel in 48 hours.
Frequently Asked Questions
Why is Greenwood a good entry point for ADU builders?
Greenwood offers more affordable home prices ($750K–$1.0M) than Ballard or Fremont while keeping similar northwest Seattle walkability. Practical 5,000–7,500 sq ft lots with alley access support detached ADUs, and rents of $2,100–$2,900/mo combined with the lower cost basis make it one of the city's most accessible ADU markets for first-time builders.
Can I build a detached ADU on a standard Greenwood lot?
Yes, in most cases. Many Greenwood lots are standard 5,000 sq ft parcels with alley access, which makes rear-yard DADU placement and utility connections practical. Seattle Municipal Code 23.44.041 governs detached ADUs. Careful management of lot coverage and setbacks maximizes the cottage size — our feasibility study maps the buildable area for your parcel.
Is parking exempt for Greenwood ADUs?
East-side Greenwood lots near the RapidRide E Line on Aurora Avenue qualify for the transit parking exemption (within a half-mile of frequent transit). Lots farther west may fall outside the exemption and need a parking space. We confirm exemption status for your specific address.
How much does an ADU cost in Greenwood?
Detached ADUs run $450,000–$800,000+, basement conversions $225,000–$400,000, and garage conversions $200,000–$325,000, plus $20,000–$50,000 in Seattle DCI permit and impact fees. Greenwood's lower land cost helps keep the total project basis more accessible than pricier neighborhoods.
