Middlesex County Assessor

Find Middlesex County Massachusetts assessor, assessment, auditor's, and appraiser's office, revenue commissions, GIS, and tax equalization departments. Assessors provide information on property and land tax assessment, property listings, values, valuations, property search, and records.


Ashland Assessor 466 Chestnut Street Ashland MA 01721 508-881-0104


Belmont Assessor 19 Moore Street Belmont MA 02478 617-489-8231

Berkley Town Assessor 1 Main Street Ayer MA 01432 978-772-8211

Carlisle Assessor 66 Westford Street Carlisle MA 01741 978-369-0392

Chelmsford Assessor 50 Billerica Rd Chelmsford MA 01824 978-250-5220

Chelmsford Town Assessor 190 Richardson Road Chelmsford MA 01863 978-251-5111

Dracut Assessor 62 Arlington Street Dracut MA 01826 978-453-2451

Dunstable Assessor 511 Main Street Dunstable MA 01827 978-649-3257

Everett Assessor 484 Broadway Everett MA 02149 617-394-2205

Groton Assessor 173 Main Street Groton MA 01450 978-448-1127

Holliston Assessor 703 Washington Street Holliston MA 01746 508-429-0604

Hopkinton Assessor 18 Main Street Hopkinton MA 01748 508-497-9720

Hudson Assessor 78 Main Street Hudson MA 01749 978-568-9620

Lincoln Assessor 16 Lincoln Road Lincoln MA 01773 781-259-2611

Littleton Assessor 37 Shattuck Street Littleton MA 01460 978-952-2313

Maynard Assessor 195 Main Street Maynard MA 01754 978-897-1001

Medford Assessor 85 George P Hassett Drive Medford MA 02155 781-393-2435

Natick Assessor 13 East Central Street Natick MA 01760 508-647-6420

Newton Assessor 1000 Commonwealth Avenue Newton MA 02459 617-796-1160

Stoneham Assessor 35 Central Street Stoneham MA 02180 781-279-2640

What if I disagree with an assessment?

Most jurisdictions have an appeal process for contesting an assessment. While the specific rules vary from one locality to the next, the process typically involves a hearing before an assessment appeal board. Taxpayers who have concerns about their assessment should visit their local Assessor's Office or its website to learn about the appeal process and what information is required in order to appeal a property tax assessment.

How does my assessment affect the taxes I owe?

The formula used to calculate property taxes varies by location. Your assessment is one part of your property tax calculation. Your property tax payment is calculated by multiplying your property's assessed value, or in some cases half of the assessed value, by the tax rate for your location.

What is the difference between assessed value and market value?

Market value is the likely selling price of a property based on current market conditions. In some jurisdictions, the Assessor calculates an assessed value by applying a factor, for example 70%, to the market value. The assessed value is then used to calculate the taxes for that property.