Pull up Williamsburg condo data on any portal this summer and you get a story that looks like a correction. In March 2026, Williamsburg home prices were down 21.3% compared to last year, selling for a median price of $1.3M. PropertyShark's April read is even sharper, with the median home sale price in Williamsburg as of April at $1.2M, down 27.1% year-over-year on 57 closings, an 18.8% increase in volume compared to April last year.
Then look at the second line on the same reports and the story falls apart. The median price per square foot was $1,311, a 17.8% YoY change. Buyers are paying more per foot for less headline dollars. That is not a crash. That is a composition problem, and underneath it sits a tax mechanic that most listing descriptions bury in a single line.
The number that contradicts itself
Three data sets, three ways of describing the same quarter:
| Source | Window | Williamsburg / Brooklyn condo signal |
|---|---|---|
| PropertyShark | April 2026 | Median $1.2M, down 27.1% YoY; ppsf $1,311, up 17.8% YoY |
| Redfin | March 2026 | Median $1.3M, down 21.3% YoY; ppsf ~$1,520, up 2.9% YoY |
| Corcoran, 1Q 2026 Brooklyn | Q1 2026 | Resale condo and new development median prices rose 12% and 8% respectively due to a greater share of sales over $2M, especially in DUMBO, Park Slope, Williamsburg, and Greenpoint |
Two of the three show medians dropping. The third, working off the same market, shows them rising. The reconciling piece is in the Corcoran read: the mix of what closed shifted. When more $2M+ product prices in one quarter and fewer sub-$1M studios trade the next, the median moves for reasons that have nothing to do with any individual apartment being worth more or less. Corcoran also noted that new development closings fell 22% annually, hitting their lowest first-quarter level in 10 years, which pulls a particular type of listing out of the average.
The thesis follows from there. The Williamsburg median is not measuring price. It is measuring which buildings happened to close, and the biggest silent variable inside that mix is how much 421-a runway each building has left on its tax bill.
Why the tax line is doing the heavy lifting
The 421a tax abatement program expired in January 2023. Developers can no longer take advantage of the 421a tax abatement program for new projects, though they can use it for projects that began before December 22, 2022. Albany passed the 485-x replacement as part of the 2024 state budget. The new program applies to construction that begins after June 2024 with stricter affordability and prevailing-wage terms.
What that means for a Williamsburg buyer in July 2026 is that every condo on the market falls into one of three tax buckets, and the buckets look almost identical from the outside:
- New waterfront deliveries with fresh 20- or 25-year 421-a benefits. Several recent deliveries retain 20- and 25-year 421-a abatements through 2042-2045, including 35 Hudson Yards, One High Line, 111 West 57th, Central Park Tower, and select Brooklyn waterfront condos in Williamsburg and DUMBO. These carry very low monthly taxes and will keep doing so through the next presidential cycle and beyond.
- Mid-2010s buildings midway through a 15- or 25-year schedule, some already into their phase-out steps.
- Older resale stock with no abatement at all, paying full tax from day one.
Two three-bedrooms with the same asking price and the same $/sf can carry monthly tax bills that are an order of magnitude apart. Williamsburg's Oosten is one of the loft-style examples where some condo-owning residents pay only a few dollars a month in real estate taxes. A no-abatement resale two blocks away will not.
That gap is what is bending the median. Abated new-dev product prints high in $/sf because buyers underwrite the low tax line into their maximum offer. Non-abated resale prints lower headline prices because buyers underwrite the full tax bill into theirs. When the mix of closings in a quarter tilts toward one or the other, the median jumps or drops without any single apartment changing value.
The phase-out is where the sticker shock lives
The abatement never falls off a cliff. It steps down. A typical 15-year schedule reads:
| Year | Exemption on the assessed-value uplift |
|---|---|
| 1 through 11 | 100% |
| 12 | 80% |
| 13 | 60% |
| 14 | 40% |
| 15 | 20% |
| 16 onward | 0%, full tax due |
That structure is documented in the standard 421-a phase-out schedules and matches what a common 15-year phase-out looks like: years 1-11 100% exemption on the increase in assessed value, year 12 80%, year 13 60%, year 14 40%, year 15 20%, year 16 and beyond full property taxes are due. The 25-year version stretches the top step but ends the same way.
For a Williamsburg two-bedroom, the swing is not academic. Industry data puts typical NYC savings from an active 421-a benefit in the range of $8,000 to $25,000 per year in property taxes, depending on the unit size and building location. Roll off the last step and that number lands on the monthly maintenance line, not the closing statement. Buyers who used the abated tax figure to qualify for their mortgage find their debt-to-income ratio moved without their income moving.
This is the friction the median doesn't show. It is also the friction that most buyers don't ask about until inspection week, at which point the abatement schedule is already baked into what they paid.
How to read a Williamsburg listing's tax line before you offer
The full schedule is public. Three steps get you the number that matters, which is what the tax will be five, ten, and sixteen years out:
- Search the address in NYC Department of Finance Property Inquiry. Search the address at propertyinquiry.finance.nyc.gov. The "Exemptions" section will show "421A" if the abatement is active, along with the start and end dates. The DOF's public 421-a records currently cover tax year 2013-14 through June 30, 2026, so a fresh Williamsburg building will appear as soon as its benefit is certified.
- Pull the offering plan. The condo's offering plan, filed with the NY Attorney General, contains the full abatement schedule, including exactly when the phase-in increases occur and when the benefit expires. This is the document that tells you whether you are looking at a 15-, 20-, 25-, or 35-year benefit and where inside the schedule you are landing.
- Model three tax lines, not one. Underwrite the property at the current tax, the tax at the first phase-out step, and the tax post-expiration. If the last figure breaks the deal, you are relying on a subsidy you don't own.
Any competent listing agent should know the abatement status and remaining years. If they cannot answer this question, that is a red flag. That is a fair test to apply on either side of a Williamsburg transaction.
What this means for what you actually pay
Two takeaways sit inside the same market.
Sellers of abated units are in a stronger position than the median suggests. A five-year-old waterfront condo with 20-plus years of benefit remaining is a different asset than a comparable resale next door, and pricing it against the neighborhood median gives away the value of the tax line. Appraisal-informed comping means grouping by abatement runway, not just by building.
Buyers of non-abated resale are in a stronger position than the median suggests too. What looks like a discount versus a shiny new tower next door is often just the market repricing for a tax bill you already knew was coming. The number is honest. It just isn't a bargain.
Corcoran's Q1 2026 read that signed contracts fell 14% year over year, the steepest annual decline in more than two years, and days on market averaged 87 days, down 11% year over year is consistent with buyers slowing down and doing this math more carefully. The listings that clear fast are the ones where the tax story is legible.
FAQ
Is the Williamsburg condo market actually down? On a same-building, same-unit basis, no clear evidence of a broad decline. The median moved because the mix of what closed shifted toward smaller and non-abated units, while ppsf rose in the same window.
Do co-ops get 421-a? 421-a does not apply to co-ops since they're rarely new construction. Co-ops have their own separate abatement programs that flow through maintenance.
What replaced 421-a for new Williamsburg construction? 485-x provides a 35-year benefit with 25 years at full exemption followed by 10 years at a reduced rate equal to the affordability percentage, with a homeownership version at 20 years of full exemption. It applies only to projects that broke ground after June 2024, so it will take years before those buildings show up in Williamsburg resale data.
If you are underwriting a Williamsburg condo purchase or preparing an abated unit for sale, the tax schedule is not a footnote. DE Advisory Team reads it the way we read a comp: as a line item that changes the offer. Request a home valuation and we will model the carrying cost through expiration alongside the price.
