Two houses sit four doors apart on the same Seattle block. Same zoning, same age, both listed this summer. One seller fielded a call from a builder before the first open house. The other seller, who had read the same headlines about four units per lot, priced in a premium that never arrived and spent August cutting.
Nothing about the code separated them. What separated them was floor area, lot width, a pair of mature conifers, and the price a finished townhome is currently fetching.
Here is the claim worth holding onto: since January 21, 2026, Seattle's new zoning capacity is close to universal, but the land premium is not. Capacity is what the code allows. A bid is what a builder can pay after the math survives contact with the floor area limit, the tree protection area, and a new construction market that is the softest segment in the city. Those are two different numbers, and most sellers are quoting the first one.
The code says four. The floor area usually says three
Phase 1 of the One Seattle Plan zoning update took effect January 21, 2026, through Council Bill 120993 and ordinances 127375 and 127376. It collapsed the old NR1, NR2, and NR3 designations into a single Neighborhood Residential zone, converted Residential Small Lot land to Lowrise 1, and set density by unit count instead of minimum lot size. Four homes are allowed on most NR lots. Six within a quarter mile of a major transit stop, or when affordable units are included. Lot coverage rises to roughly 50 percent when you build multiple principal dwellings. Accessory dwelling units can now reach 1,000 square feet, or 1,200 with three or more bedrooms, though they count against the lot's unit allowance rather than sitting outside it.
Then comes the part that decides the money. The floor area cap did not scale with the unit count. Sightline Institute flagged this while the plan was in draft, arguing that a flat cap regardless of unit count would produce an anemic pace of construction. Seattle architects have run the same arithmetic on real parcels. CAST Architecture modeled a standard 5,000 square foot lot under the new code and found roughly 4,000 square feet of buildable floor area, which realistically supports three townhomes, not four. The fourth unit needs a floor area ratio closer to 1.0 or 1.2 before it appears in a pro forma.
The city knew this before adoption. The EcoNorthwest middle housing feasibility analysis prepared for the Office of Planning and Community Development concluded that roughly 19 percent of NR-zoned properties could be financially feasible under the proposed zoning, and projected about 36,400 net new units over 20 years. Nineteen percent is the honest denominator for any homeowner asking whether a builder will care about their lot.
A builder's bid works backward from a soft exit
Land buyers do not price your dirt off your zoning. They price it off what the finished product sells for, minus construction, financing, fees, and their margin. That exit is currently the weak spot in Seattle.
In July 2026, new construction in Seattle carried 5.4 months of supply, with new listings up 49 percent, active inventory up 34.3 percent, and pending sales up 19.8 percent. Demand is there. So is the competition, and buyers can compare several nearly identical homes at once. Condos sat at 6.2 months that month, averaging 40 days on market and closing at 98.1 percent of last list price.
Behind that, the pipeline that produces those buyers has thinned. Seattle permitted fewer than 2,000 housing units in 2025, down 88 percent from the 2020 peak of about 17,400 units. Mandatory Housing Affordability collections fell to roughly $25 million in 2025 from a $74 million peak in 2021, with 2026 projected lower still. In April 2026, a group of builders calling themselves the Seattle Housing Roundtable asked Mayor Katie Wilson and the City Council to cut MHA fees by 90 percent this year, pointing to roughly 125 stalled projects. Land use attorney Ian Morrison of McCullough Hill put it plainly to reporters: projects that were viable in the late 2010s no longer work.
Fewer active builders, tighter underwriting, and a slower exit all land in the same place. Your lot's theoretical fourth unit is worth nothing if nobody is buying lots this quarter.
Trees became a density question on the same day
The other January 21, 2026 change most sellers have not read is Ordinance 127300, which rewrote how tree protection areas work. The "basic tree protection area" was deleted from the code. In Neighborhood Residential zones, required tree protection areas do not count as buildable area, and neither do strips of land less than 10 feet wide caught between a protection area and a setback. When a lot has several trees, SDCI evaluates removal based on the sum of all tree protection areas on the site, not tree by tree.
Read that as a pricing rule. Two mature Tier 2 trees in the middle of a 5,000 square foot lot can subtract enough buildable area to drop the site from three units to two, which usually drops it out of builder consideration entirely. The trees a listing photo treats as an asset, a feasibility study treats as square footage.
The upzone people are pricing in was postponed to 2027
This is where sellers in the proposed growth areas are most exposed. The Centers and Corridors legislation, transmitted to Council in January 2026, would rezone 30 new Neighborhood Centers along with expanded Urban Centers and frequent transit corridors, allowing residential and mixed use buildings up to six stories in the cores and four to five stories toward the edges. Montlake, Madison Valley, Madison Park, and Madrona are among the named centers. It had been on track for adoption by early August 2026.
On June 1, 2026, the Washington Court of Appeals ruled in favor of two appellants seeking to reopen the environmental review of the growth plan, finding that procedural steps such as issuing a final environmental impact statement are not covered by the state's safe harbor exemption. Council canceled its summer comprehensive plan committee meetings. Councilmember Eddie Lin, who chairs the effort, announced that Phase 2 is delayed into 2027.
"Just to speak through our comprehensive plan process: I think that process started in 2022. We are now in 2026. I think we're probably going to be 2027, 2028 before we get through that process."
Council responded in July 2026 by passing Council Bill 121215 on a 5-4 vote, routing future environmental appeals of comprehensive plan changes to King County Superior Court or the state Growth Management Hearings Board instead of the city's hearing examiner, where a $120 filing could hold up citywide zoning. That fixes the next cycle. It does not accelerate this one. Mayor Wilson's broader "Taller Denser Faster" proposal is penciled for late 2027 at the earliest.
If you own in a proposed Neighborhood Center and you are pricing six-story potential into a 2026 sale, you are selling something the Council has not adopted.
What actually moves the number
| Lot attribute | Why a builder cares |
|---|---|
| Size above roughly 7,500 square feet | Floor area scales, and larger lots can support more than six units, with about eight on 10,000 square feet |
| Within a quarter mile of a major transit stop | Density allowance rises by half, the single largest swing in the code |
| Flat, wide, regular shape with alley or easy utility access | Site work and access costs are where small projects die |
| Few or no Tier 1 or Tier 2 trees | Protection areas are subtracted from buildable area and summed across the site |
| No critical areas | Steep slopes, wetlands, and riparian corridors are excluded from the coverage calculation |
| Strong finished townhome comps nearby | The exit sets the bid, and larger lots in Ballard, Wallingford, Queen Anne, Magnolia, and Green Lake are drawing the most builder attention |
Two related mechanics matter at closing rather than at pricing. Administrative lot splitting under E2SHB 1096 is not a tool Seattle owners can generally use yet; cities have until July 27, 2027 to adopt it, and minimum lot size and density rules still apply. Unit lot subdivision is the live question instead, because fee simple unit lots finance more cleanly than condominium structures, and since June 30, 2026 purchasers must be notified of a unit lot's legal status.
Meanwhile, the retail buyer is still paying full price
Here is the part that should change what you do next. In July 2026, the median Seattle sale price reported through NWMLS was $868,250, up 1.8 percent year over year, with a median of 14 days on market and about 3.7 months of supply. Resale residential homes averaged 18 days on market and closed at 100.6 percent of last list price. Redfin's three month trailing figure through June 2026 read $890,000, down 2.3 percent, at $547 per square foot. The two diverge because one blends all closed sales while the other separates houses from condos, and the blended number is being pulled down by a soft condo market. The 30 year fixed rate was 6.67 percent as of August 13, 2026, per Freddie Mac.
Translate that. The owner-occupant buying a well-prepared house is paying essentially the full asking price in under three weeks. The builder buying a lot is underwriting against a 5.4 month exit and asking the city for a fee holiday. In 2026, the certain money is in the retail sale, and it is earned through repairs, staging, and media, not through speculation about unit counts.
That does not mean ignore the zoning. It means find out which sale you are actually running before you pick a price. On a lot with real density upside, we market to both audiences deliberately, with a feasibility read in hand, because the pricing logic for a builder and an owner-occupant are different arguments. On the other roughly four out of five lots, the honest answer is that the code changed and your value did not, and the highest return on your next sixty days is cleaning, landscaping, and a floor plan that shows the house well.
Questions we get on this
My neighbor got a builder offer and I did not. Why? Almost always lot geometry, size, transit distance, or trees. Capacity is citywide; feasibility is parcel specific. The zoning map will not tell you which side you are on, and neither will a portal estimate.
Should I wait for the Centers and Corridors upzone before selling? That is a 2027 timing bet at minimum, with the appeals still working through court. Waiting also means carrying the property through another rate cycle.
Can I split my lot and sell half? Not through the streamlined state process yet. Seattle has until July 2027 to adopt administrative lot splitting, and minimum lot size and density rules still apply when it arrives.
Does an existing ADU help a builder's math? It counts toward the lot's unit allowance now rather than sitting outside it, so it can help a buy and hold owner and do very little for a redevelopment buyer.
Zoning is site specific and mid transition. Confirm anything parcel level with SDCI before you act on it, and treat this as market context rather than legal or tax advice.
If you own a Seattle house and you want a straight answer about whether you are selling a home or selling a lot, that is the conversation we have first, before pricing, before prep, before a single vendor gets scheduled. Cedar to Sound Homes will pull the parcel details, read the comps for both buyer types, and tell you which of the two sales is worth your next ninety days. Get a free home valuation and we will handle the legwork from there.
