Every buyer comparing Windham to Salem, Londonderry, or Bedford starts with the same number: the price on the listing. It is the wrong starting point. A $750,000 Colonial in Windham and a $750,000 Colonial three towns over do not cost the same thing to own, because the property tax rate attached to that price varies enough to swing a monthly payment by hundreds of dollars. And in Windham specifically, that rate is not the stable planning input it looks like right now. The town just finished a state-mandated revaluation, and the number that gets set on the back of it this fall will decide what buyers are actually signing up for.
This is the part of the Windham market that does not show up on a portal card. The median price tells you what the last buyer paid. The tax rate tells you what you will pay every year after that, and it is set through a mechanism most buyers never think to ask about until the first bill arrives.
The Math Portals Don't Run
Windham's 2025 property tax rate was $14.15 per $1,000 of assessed value, among the lowest of any town in the immediate area. Neighboring Londonderry sat at $14.47. Bedford came in at $16.49, Nashua at $16.83. Move further out and the gap widens fast: Hollis at $18.90, Milford at $25.93.
| Town | 2025 Rate per $1,000 Assessed |
|---|---|
| Windham | $14.15 |
| Londonderry | $14.47 |
| Bedford | $16.49 |
| Nashua | $16.83 |
| Hollis | $18.90 |
| Milford | $25.93 |
Run that difference against an actual mortgage and the number stops being abstract. On a $500,000 assessment, Windham's rate produces an annual bill around $7,075. A town taxing at roughly double that rate produces a bill closer to $14,555, a gap of about $623 a month once you account for how lenders escrow taxes into the payment. At the 6.71 percent average 30-year mortgage rate Freddie Mac reported for the first week of September 2026, that monthly difference supports roughly $96,000 of additional loan balance. In plain terms, the same monthly budget buys a materially larger house in a low-rate town, and Windham's price levels already reflect that. The tax rate is not separate from the sale price. It is priced into it.
Buyers who skip this step and compare Windham to a neighboring town on sale price alone are comparing two different products.
Why This Rate Won't Hold Through Winter
Here is the part that makes this fall different from any other fall in the past five years. New Hampshire requires every municipality to conduct a full property revaluation on a five-year cycle under RSA 75:8-a, and Windham's cycle landed in 2025. The town's assessing department confirmed the reappraisal went out to property owners last year, and the state's own revaluation schedule lists 2025 as Windham's assigned year.
That matters because the tax rate is not a fixed number the town picks. It is the result of dividing the budget the town needs by the total assessed value of everything in it. When assessed values were sitting below true market value, which happens naturally in the years between revaluations as home prices climb faster than paperwork, the town needed a higher rate to raise the same money. Now that Windham's assessments have been reset closer to actual market value, the same budget divides across a larger assessed base, which is exactly why a revaluation year and a lower nominal rate tend to travel together.
The state's Department of Revenue Administration runs a sales ratio study on every town each year, comparing recent sale prices to assessed values, and Windham's assessing office was slated to receive its official ratio by February or March of 2026, based on sales between October 2024 and September 2025. The actual 2026 tax rate still gets certified town by town in October and November, which means it has not been set as of this writing. What is certain is that a revaluation does not lower or raise the total amount Windham collects. It redistributes who pays what, based on how each property's value moved relative to the town average. A home that gained value faster than the town-wide median could see its bill rise even as the headline rate falls. A buyer closing on a Windham home this fall is buying into a rate that is about to be recalculated, not one that is settled.
Where Windham's Next Supply Is Actually Landing
The tax story explains what a Windham home costs to hold. It does not explain what is available to buy, and that half of the picture is just as uneven.
Windham's new construction is not spread evenly across town. It clusters around a handful of specific projects moving through the planning process, and each one serves a different buyer. Near Indian Rock Road, plans call for 45 townhouse units, a denser format than most of Windham's existing housing stock. Off Lilac Ridge Road, Mid Trail Crossing is a 55-and-over community of 51 detached condominium units, built with the kind of low-maintenance layout that appeals to downsizers who still want a private entrance and a garage. Lilac Ridge itself is a separate, smaller project, a 15-lot subdivision of custom homes on larger parcels, with listings that have included five-bedroom houses on lots over two acres backing up to rail trail access.
Three projects, three different buyers: someone who wants a lower-maintenance attached home, someone in the 55-plus bracket looking to downsize without leaving town, and someone who wants acreage and a custom floor plan. That range is useful context, but it comes with a timing catch specific to new construction. Windham's Building Safety Division needs five days to process a certificate of occupancy once inspections and paperwork are complete, and that clock only starts after everything else is finished. A new-construction closing date depends on where the house sits in that sequence, not on how finished it looks from the driveway.
There is a second detail worth checking before writing an offer on anything in a newer Windham subdivision. Many of the roads serving these developments are private and not yet accepted by the town, which means the Highway Division has no obligation to plow, pave, or maintain them. Before you get attached to a lot, it is worth asking directly who handles snow removal, who pays for repaving when the road eventually needs it, and whether the road is on any timeline for town acceptance. None of that shows up in a listing photo.
The Lake Adds a Different Kind of Math
Windham's waterfront inventory runs on its own logic, separate from both the tax story and the new-construction story. Homes on Cobbetts Pond and Canobie Lake typically list well above the town median, often in the $900,000 to $1.4 million range, and that premium reflects scarcity rather than square footage. There is a fixed amount of shoreline in Windham and no mechanism, tax-related or otherwise, that changes how much of it exists. Buyers targeting the lake are competing in a smaller, less substitutable pool than buyers looking at a standard half-acre Colonial, and the tax-rate math above still applies to whatever they end up paying, just on a higher base.
Two Questions Worth Settling Before You Write an Offer
Will my Windham tax bill go up because of the revaluation? Not necessarily, and not automatically. A revaluation resets the assessed base town-wide, and the rate is recalculated to match the same budget against that new base. Whether your specific bill rises or falls depends on how your property's assessed value moved relative to the town average, which is information the assessing office can pull for individual parcels once the new rate is certified this fall.
Are Windham's newer subdivision roads maintained by the town? Not always. Some newer subdivision roads remain private and unaccepted, meaning the Highway Division has no maintenance obligation. Ask the listing agent or the town's Community Development Department directly before assuming plowing and repaving are covered.
Windham's price tag has never told the whole story, and this fall it tells even less of it than usual, with a new tax rate about to be certified on top of assessed values that already shifted last year. Buyers who understand both halves of that equation, the rate and the timing, are in a better position to judge what a specific Windham address will actually cost them to hold, not just to buy.
If you are comparing Windham against other Rockingham County towns and want help running the real math on a specific property, Cheryl Zarella can walk through the numbers with you. Request a complimentary home valuation to start.
