Why does this insight matter for WA ADU owners?

Each insight on the Golden State journal targets a specific decision point in the ADU lifecycle — financing structure, design tradeoffs, code changes, market data, or operating decisions for a rental unit. We publish only when we have new primary data from our own bid archive, permit logs, or comp pulls related to "Redmond ADUs and the Microsoft commute calculus". The goal is decision-grade information, not generic marketing copy. Go deeper: Glossary: ADU (Accessory Dwelling Unit) (/glossary/adu).

How current is the data in this article?

Insights are dated and the underlying datasets refresh on a rolling basis: cost-per-sqft benchmarks update quarterly from our active Puget Sound bid book, permit timelines update monthly from AHJ logs, rent comps update quarterly from on-market and recently-leased pulls in King/Pierce/Snohomish. Each chart or table notes its as-of date. If you need a custom analysis against your specific submarket, request a feasibility study. Go deeper: Glossary: RRIO (Rental Registration & Inspection Ordinance) (/glossary/rrio).

Can I reuse this analysis for my own planning?

Yes — every insight is written to be actionable. The math is shown, the assumptions are named, and the conclusion is tied to a specific decision (which loan, which finish tier, which AHJ, which size). Feel free to share with your CPA, lender, or family decision-makers. If you'd like a 30-minute walkthrough of how the article's framework applies to your specific lot, book a free scoping call. Go deeper: Glossary: ECA (Environmentally Critical Area) (/glossary/eca).

Does "Redmond ADUs and the Microsoft commute calculus" apply to my Puget Sound city?

Most insights are written to apply across the Puget Sound region with the city-specific variables (fees, permit medians, rent comps) called out in tables. When the analysis is city-specific (e.g., Seattle SDCI process), it's labeled in the headline. Use the city pages linked from the article to map the framework to your specific AHJ. Go deeper: Read: Redmond ADUs and the Microsoft commute calculus (/insights/redmond-adu-microsoft-commute).

Where do I go from here?

Three good next stops: (1) the ROI calculator if you're evaluating whether the math works on your lot; (2) the permit timeline page for current AHJ medians in your city; (3) the contact form to book a free 20-minute scoping call. Every insight cross-links the most relevant next pages at the bottom. Go deeper: Glossary: ECA (Environmentally Critical Area) (/glossary/eca).

August 30, 2025 · 7 min

Redmond ADUs and the Microsoft commute calculus

Why a Redmond DADU pencils out for tech-employee rentals — and how the city's updated code interacts with the light-rail expansion.

Redmond's HB 1337 implementation

Redmond's ADU regulations, updated in 2024 to align with HB 1337, allow two ADUs on any single-family lot. Maximum DADU size is 1,000 sqft. Height limit is 25 feet for flat roofs and 30 feet for pitched roofs. Owner-occupancy was removed.

Redmond does retain a tree-retention threshold that is stricter than HB 1337's floor — projects on lots with significant canopy must preserve a percentage of regulated trees or replant at a 3:1 ratio. We coordinate arborist reports during feasibility for any Redmond DADU on a wooded lot.

Sources:Municipal Research and Services Center of Washington

Rental demand from the Microsoft and Meta footprints

American Community Survey data shows Redmond's renter-occupied housing share growing faster than King County average, driven by the Microsoft, Meta, and Google office expansions east of 148th Ave NE. Median asking rent for a 1-bedroom unit in Redmond cleared $2,400/month in 2025 — well above Seattle citywide medians.

A 600–800 sqft DADU rents inside that band reliably, and the tenant pool is unusually high-credit and short-tenure, which keeps vacancy days down.

Sources:U.S. Census Bureau

Light rail changes the math

The 2 Line extension to downtown Redmond is now in revenue service, with stations at Marymoor Village, Downtown Redmond, and Redmond Technology. Parcels within a 10-minute walk of any of those stations qualify for the half-mile parking exemption, and rental comps within that walkshed price about 8–12% above the citywide median.

If your lot is in that walkshed, the no-parking pathway not only saves $15,000–$25,000 in driveway-and-curb-cut work but also frees footprint for a slightly larger unit.

Numbers, with sources

Median DADU all-in cost in Redmond at our shop in 2025: $355,000 for an 800-sqft unit, soup to nuts. Expected gross rent at completion: $2,500–$2,900/month. Simple cap rate at midpoint: ~9.1% — meaningfully above what we see in Seattle proper, mostly because Redmond rents have outrun build costs since the light-rail opening.

FROM_THE_FIELD / Built work

Full archive →

FAQ

Frequently asked

Why does this insight matter for WA ADU owners?
Each insight on the Golden State journal targets a specific decision point in the ADU lifecycle — financing structure, design tradeoffs, code changes, market data, or operating decisions for a rental unit. We publish only when we have new primary data from our own bid archive, permit logs, or comp pulls related to "Redmond ADUs and the Microsoft commute calculus". The goal is decision-grade information, not generic marketing copy.
Go deeper: Glossary: ADU (Accessory Dwelling Unit)
How current is the data in this article?
Insights are dated and the underlying datasets refresh on a rolling basis: cost-per-sqft benchmarks update quarterly from our active Puget Sound bid book, permit timelines update monthly from AHJ logs, rent comps update quarterly from on-market and recently-leased pulls in King/Pierce/Snohomish. Each chart or table notes its as-of date. If you need a custom analysis against your specific submarket, request a feasibility study.
Go deeper: Glossary: RRIO (Rental Registration & Inspection Ordinance)
Can I reuse this analysis for my own planning?
Yes — every insight is written to be actionable. The math is shown, the assumptions are named, and the conclusion is tied to a specific decision (which loan, which finish tier, which AHJ, which size). Feel free to share with your CPA, lender, or family decision-makers. If you'd like a 30-minute walkthrough of how the article's framework applies to your specific lot, book a free scoping call.
Go deeper: Glossary: ECA (Environmentally Critical Area)
Does "Redmond ADUs and the Microsoft commute calculus" apply to my Puget Sound city?
Most insights are written to apply across the Puget Sound region with the city-specific variables (fees, permit medians, rent comps) called out in tables. When the analysis is city-specific (e.g., Seattle SDCI process), it's labeled in the headline. Use the city pages linked from the article to map the framework to your specific AHJ.
Go deeper: Read: Redmond ADUs and the Microsoft commute calculus
Where do I go from here?
Three good next stops: (1) the ROI calculator if you're evaluating whether the math works on your lot; (2) the permit timeline page for current AHJ medians in your city; (3) the contact form to book a free 20-minute scoping call. Every insight cross-links the most relevant next pages at the bottom.
Go deeper: Glossary: ECA (Environmentally Critical Area)

INTERNAL_LINKS / Deep Map