Worried your Somerville property tax bill is too high?
Your tax bill starts with your assessment. Run a free check to see whether your Somerville home may be over-assessed — and if the numbers suggest a real issue, continue to a guided abatement packet.
Free check. No account. No payment required.
Somerville assessments by the numbers
How Somerville assesses residential property, from 2026 records.
Informational statistics from public assessment and sales records, after setting aside nominal family/trust transfers and statistical outliers. Evenness figures compare each qualified sale’s assessment-to-sale ratio to the town’s typical ratio for its property class, adjusted to a common sale date; a high ratio is a reason to review, not proof of error. Not an appraisal, a determination of market value, or a promise of any tax change. Figures reflect the latest data snapshot and may be out of date.
Reviewing your Somerville assessment
In Massachusetts, your property tax bill is your assessed value multiplied by your town’s tax rate. In Somerville, the median residential assessment of $946,600 at the FY2026 rate of $10.98 per $1,000 works out to roughly $10,390 a year — so an assessment even 10% above where it should be is real money, every year it stands. Our comparison data for Somerville draws on 576 qualified arm’s-length sales from 2024, where homes sold at a median assessment-to-sale ratio of 0.95. Assessors are required to assess at fair cash value as of January 1 each year; if your assessment jumped, your record card looks inaccurate, or comparable homes nearby are assessed lower, it can be worth a closer look before the filing window closes.
What the free check and packet help you do
- See whether your assessment appears high
- Estimate the possible impact on your tax bill
- Compare against similar Somerville homes
- Organize property record-card details and possible issues
- Prepare a comparable-sales worksheet and evidence checklist
- Prepare a ready-to-sign Form 128 and questions for the assessor
Official Somerville resources
- Board of AssessorsSomerville assessing department
- Abatement formMassachusetts State Tax Form 128 (PDF)
- Abatement deadlineFebruary 2, 2026, 4:30 PM (FY2026; or USPS-postmarked by Feb 2) — verify with the town
- Somerville requiresFile on State Tax Form 128 in person, by USPS mail postmarked by the deadline, or by email to assessing@somervillema.gov received by the deadline. By law the assessors cannot act on a late application, so file early. (This reflects Somerville's FY2026 process; next year's is expected to be similar but should be confirmed with the town.) You must give a daytime phone number and allow an interior/exterior inspection of the property. Under M.G.L. c. 59, §61A, refusing access or not furnishing requested information within 30 days can bar your appeal. If you believe the property is overvalued, Somerville asks for a Supplemental Information Form listing three or more comparable calendar-year-2024 sales (the sales the FY2026 assessment is based on), or three or more comparable FY2026 assessments. Property Tax Hawk prepares these comparables from town sales records in your packet — you don't need to find them. For a property-record-card data error, state it on page 1 of Form 128 under 'Explanation.' Filing does not pause tax collection — pay the bill in full by the due date (a refund follows if an abatement is granted). For FY2026, a total tax over $3,000 must be paid by the due date to preserve the right to appeal a denial to the Appellate Tax Board within three months of the assessors' decision.
- Abatement guideSomerville abatement information guide (PDF)
Somerville property tax questions
What is the residential property tax rate in Somerville, MA?
Somerville's FY2026 residential tax rate is $10.98 per $1,000 of assessed value, per Massachusetts DLS data. Verify the current rate on your actual tax bill.
What is the median home assessment in Somerville?
The median residential assessment in Somerville is about $946,600 (roughly $507 per square foot), across 16,360 residential parcels in the public assessment records.
How much is the typical Somerville property tax bill?
At the FY2026 rate of $10.98 per $1,000, the median Somerville assessment of $946,600 implies a tax bill of roughly $10,390 per year, before any exemptions.
How evenly are Somerville homes assessed?
Among the 576 qualified home sales Somerville reported to the state (DLS LA3), about 1% show an assessment at least 10% above the town's typical assessment-to-sale ratio — after adjusting for sale timing and property class — and 2% at least 10% below. For the over-assessed group, the implied tax difference is a median of roughly $1,173 per year at the current rate. Ratios naturally vary; a high ratio is a reason to review your assessment, not proof of error. The free check shows where your own home stands.
When is the deadline to challenge a Somerville property assessment?
February 2, 2026, 4:30 PM (FY2026; or USPS-postmarked by Feb 2) — verify with the town
How do I appeal my Somerville property tax assessment?
File Massachusetts State Tax Form 128 (Application for Abatement) with the Somerville Board of Assessors by the deadline. Property Tax Hawk's free check compares your home with similar Somerville homes, and the optional $79 guided packet prepares the form and comparable-sales evidence for you to review, sign, and file.
See where your Somerville tax bill stands
Run a free check first. You’ll only consider the $79 guided abatement packet if the numbers suggest it’s worth it.
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