For Massachusetts homeowners
Is your town overtaxing you.
Enter your address. We check your town's official assessment record and show you, free, in about 10 seconds, whether your home may be over-assessed, while there's still time to act this year.
Built on official Massachusetts assessment records · all 351 cities and towns · see a sample report
Your free snapshot
Want a sharper result? Tell us what might be off (optional)
This snapshot is informational only and based on public assessment data, which may be incomplete or inaccurate. It does not predict legal success, abatement success, market value, or tax savings. The full Automated Assessment Self-Check Report goes deeper and can include your comparable sales and documents.
- Built for Massachusetts residential properties
- Automated, plain-English self-check
- No filing, no representation, no outcome guarantee
- Uses official assessment records
- Designed to help you ask better questions
The window closes once a year. In most Massachusetts communities, the only chance to challenge your assessment ends when your first actual tax bill is due, often early in the year. Your value is set as of January 1, so an inflated assessment costs you for another full year if you miss the date. Checking is free, takes seconds, and tells you where you stand. Verify your town's exact deadline with the assessor.
The problem
Most homeowners do not know what to check.
A higher assessment does not automatically mean anything is wrong. But property assessments can be affected by inaccurate records, overstated condition, incorrect finished space, outdated property information, or comparison data that deserves a closer look.
The first step is not filing anything. The first step is understanding the assessment.
- Is the property record card accurate?
- Did the town list finished space, garages, or outbuildings incorrectly?
- Does the condition rating overstate the property?
- Did the assessment increase more than expected?
- Would a possible assessment difference actually matter to the tax bill?
- What should I ask the assessor?
How it works
An automated, structured self-check, not guesswork.
Start with your address
Enter just your address. We look up your public assessment record and show you, free, whether it may be worth a closer look. No email, no uploads.
Complete the paid intake
Add your property record-card facts and, where available, upload your tax bill, property card, purchase documents, photos, or comparable sales.
Get an automated report
The system generates an Automated Assessment Self-Check Report from the information you provide. No manual or human review is involved.
Decide what to do next
Use the report to decide whether a conversation with the assessing office, further review, or professional guidance may be worthwhile.
What you get
What the Automated Assessment Self-Check Report includes
Property summary
Address, town, fiscal year, assessed value, tax information, property class, and the information reviewed.
Assessment & tax calculation
A clear breakdown of the assessment and the estimated tax impact of possible assessment differences.
Property-card issue checklist
A structured review of square footage, lot size, finished basement, garage, outbuildings, condition, quality grade, and special features.
Comparable-sales worksheet
A table for organizing user-provided comparison information, with notes on similarities and limitations.
Possible issues to verify
Plain-English topics that may warrant further review, without stating that the assessment is wrong.
Evidence checklist
Documents and information to gather: property records, tax bills, photos, repair estimates, purchase documents, and comparable sales.
Questions to ask the assessor
Practical questions to help you understand how the assessment was determined and what information the town may need.
Official resources
Placeholders for your town's official assessor page, abatement form, and deadline, which you verify with the town.
Downloadable report
A downloadable copy of your automated self-check report (download delivery is a placeholder in this version).
Important limits
Clear limits. No promises.
The report helps you organize information and identify topics that may warrant further review. It is generated automatically from the information you provide.
The report does not:
- provide legal advice or tax advice
- provide appraisal services or a certified valuation
- determine market value
- represent you before any town or agency
- file anything for you or contact the town
- tell you whether to seek an abatement
- guarantee a lower assessment or tax bill
- predict whether any request will be granted
- involve human, legal, or professional review
Fit check
Is this useful for you?
This is useful if
- your assessment increased significantly
- your property card may be wrong
- your home has condition issues not reflected in the record
- you bought recently below the assessed value
- similar homes appear treated differently
- you want to know what to ask before calling the assessor
This may not be useful if
- you have no property information to enter
- you are looking for representation
- you need a certified valuation
- you want someone to file documents for you
- you expect a guaranteed reduction
The offer
Start free. The full report is $79, once.
If your assessment is overstated by even $50,000, that is roughly $500 to $700 in tax every single year, and it keeps recurring until someone catches it. The Automated Assessment Self-Check Report is $79, one time. Do the math on a single year, then on ten. (Figures are illustrative; actual impact depends on your town's rate and is not a guarantee of any result.)
Free Assessment Snapshot
$0
Start here. No email, no risk.
- just your address, no email required
- your assessed value and recent-sale comparison
- estimated review category in about 10 seconds
- what to check before you call the assessor
- option to continue to the full report
Automated Assessment Self-Check Report
$79 one time
Everything you need to decide whether to act, and how.
- property summary
- assessment & tax calculation
- property-card issue checklist
- user-provided comparable-sales worksheet
- estimated tax impact
- evidence checklist
- questions to ask the assessor
- official resource links for your town
- downloadable report
You see it before you pay. Your free snapshot shows your verdict, your numbers, and the comparable homes assessed below yours. The $79 report unlocks the comparable addresses and the full self-check, so you know exactly what you are buying before you buy it.
A Premium Review Packet may be offered later. The report is informational only and does not provide legal, tax, or appraisal advice, determine market value, or guarantee any outcome.
Takes about 10 seconds
See where your assessment stands, free.
No email, no account. Enter your address and find out today, before this year's window closes.
FAQ
Common questions
Is this an appeal service?
No. OverassessedMA does not file documents, communicate with the town, or represent homeowners. It provides an automated informational self-check report to help organize information before you decide what to do next.
Is a person reviewing my submission?
No. The report is generated automatically from the information you provide. It does not involve human, legal, or professional review.
Is this legal advice?
No. The report does not provide legal advice, tax advice, or representation.
Is this an appraisal?
No. The report is not an appraisal, certified valuation, or opinion of market value. It is an automated informational assessment-review report.
Will this reduce my tax bill?
No result is guaranteed. The report estimates possible tax impact as a mathematical calculation only. It does not predict that any assessment or tax bill will change.
What deadline applies?
Deadlines vary by municipality and billing system. Typically, Massachusetts property tax abatement applications must be filed by the due date of the first actual tax bill for the year, and in quarterly-billing communities that is usually the third-quarter bill. You must verify the applicable deadline with your city or town.
What is the assessment supposed to reflect?
Massachusetts assessors are required to assess property at fair cash value as of January 1 each year. The report helps organize information relevant to understanding the assessment, but it does not determine fair cash value.
What information should I provide?
Helpful materials include your tax bill, property record card, recent appraisal if any, recent purchase documents if any, photos of condition issues, repair estimates, and comparable-sale information.
Disclaimer / terms summary
Important limitations
OverassessedMA provides automated informational assessment-review tools only. It is not a law firm, appraisal service, tax advisor, or representative. The Automated Assessment Self-Check Report is generated automatically from the information you provide and does not provide legal advice, tax advice, appraisal services, market value determinations, representation, filing services, or outcome guarantees.
You are responsible for verifying all facts, deadlines, forms, filing requirements, and official procedures with the applicable city or town. The report may be incomplete or inaccurate if the information submitted is incomplete or inaccurate.
Ready to start?
Before you decide what to do next, understand what the assessment is based on.
Start with the free snapshot. Continue to the $79 automated report only if you want the full self-check.