Who verifies that the assessing model used by the Town and the resulting property values are accurate?

Annually, the Massachusetts Department of Revenue (DOR) performs a statistical analysis of the Town's proposed assessments. Additionally, every four to five years, the DOR conducts a Revaluation, which is a comprehensive analysis of the Town's appraisal process, and reviews property values in great detail to ensure that the assessments represent full and fair market values. The last Revaluation for the Town of Dennis was in 2017, when the values were certified by the DOR after a rigorous review. The next Revaluation is 2021, and then every 5 years following the 2021 Revaluation.

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1. How do I change my billing address?
2. Why is the previous owner's name on the Tax Bill?
3. How does the Assessors’ Office determine the value of my house?
4. What does 100% of full and fair cash value mean?
5. How is Mass Appraisal different from a Fee Appraisal?
6. What is the basis for determining residential property values?
7. Why do land values change at different rates from building values?
8. Who verifies that the assessing model used by the Town and the resulting property values are accurate?
9. How do I dispute my assessed value if I think it is too high?
10. What do the assessors look at when determining an assessment?
11. Why should I let the Town Assessing Department into my house for an inspection?
12. How are Real Estate taxes calculated?
13. How is the town able to raise my taxes by more than the 2 ½ % limit prescribed by Proposition 2 ½?
14. What if I cannot afford to pay my Real Estate taxes?
15. Why has my tax bill gone up more than 2.5%? Doesn’t Proposition 2 ½ limit the tax increase?
16. My assessment increased more than 2.5%. Doesn’t Proposition 2 ½ limit the amount my assessment can increase?
17. My neighbor told me not to let a representative from the assessors’ office into my house. Do I have to let the assessors into my house?
18. My neighbor does not allow the assessors in and I do. Am I being penalized?
19. Why do the assessors want to see the interior and exterior of my property?
20. Why did my assessed value increase when I did not do anything to the property in 5 years and I am not selling the property?
21. What percentage of market value are the assessed values?
22. Why did my assessment change a different percentage than the assessment on my neighbor’s house?
23. My assessment increased 20%. Does that mean my taxes will increase 20%?
24. I think my assessment is out of line with my neighbors’ property, whose property is assessed lower. I want my assessment to be as low as theirs.
25. There is an item on my tax bill called “CPA Charge”. What is that?
26. There is an item on my tax bill called “WIIF Charge”. What is that?