Roof permit rules in Cambridge, MA
Short answer: A roof replacement appears to need a permit in Cambridge, MA. Cambridge spells out how its roofing permit fee is worked out; the calculator below follows that rule exactly.
10 rules in all. We read Cambridge Inspectional Services Department and kept the sentence behind every rule on this page. Cambridge’s fee follows its published formula, below.
Checked October 9, 2026. Information, not legal advice: confirm with the building department before you start.
What the permit fee comes to
Cambridge permit fee$240.00
$15 per $1,000 of declared value (or part of it). Extra Cambridge charges such as plan review or state surcharges are not in this figure.
Cambridge roof permit rules at a glance
| Permit for a roof replacement | Required (implied)Cambridge offers a separate online building-permit application for roofs, next to those for new construction, additions and alterations, siding and solar. cambridgema.gov |
|---|---|
| Permit for a repair | Not confirmedWe could not tie permit for a repair to a sentence on a Cambridge page. |
| Who files | Owner or contractorAs an exception to the general requirement, building permits are also issued to homeowners doing work on one- or two-unit dwellings where they live or intend to live. cambridgema.gov |
| Fee | Formula published$15 per $1,000 of declared value (or part of it). |
| Inspections | StatedThe city's FAQ says only one layer of roofing may remain when re-roofing. cambridgema.gov |
| Review time | Not confirmedNothing on Cambridge's pages was specific enough to quote for review time. |
The permit fee in Cambridge
$15 per $1,000 of declared value (or part of it).
cambridgema.gov. Read on October 9, 2026.
For repairs and alterations on up to three residential dwelling units the fee is $15 per $1,000 of construction cost or fraction thereof, with a $50 minimum.
cambridgema.gov. Read on October 9, 2026.
Starting permit-required work before getting the permit triples the fee.
cambridgema.gov. Read on October 9, 2026.
| Declared value | Permit fee | Share of value |
|---|---|---|
| $9,700 | $150.00 | 1.55% |
| $15,100 | $240.00 | 1.59% |
| $22,300 | $345.00 | 1.55% |
What Cambridge re-roofs actually declared
Our 2025 count for Cambridge is 162 re-roof permits after filtering. The median declared cost was $15,125, and the middle half sat between $9,652 and $22,344. For a job at the median, Cambridge’s formula comes to $240.00 (1.59 percent of the declared value).
Cambridge: permit for a roof replacement
Cambridge offers a separate online building-permit application for roofs, next to those for new construction, additions and alterations, siding and solar.
cambridgema.gov. Read on October 9, 2026. The page implies this; it does not state it in so many words.
Cambridge: who files
As an exception to the general requirement, building permits are also issued to homeowners doing work on one- or two-unit dwellings where they live or intend to live.
cambridgema.gov. Read on October 9, 2026.
Cambridge: inspections
The city's FAQ says only one layer of roofing may remain when re-roofing.
cambridgema.gov. Read on October 9, 2026.
Cambridge: how long a permit lasts
Work must start within six months of the permit date and then continue to completion.
cambridgema.gov. Read on October 9, 2026.
Cambridge: exceptions and extra rules
A homeowner who pulls the permit may be liable for contractors on the property and is not covered by the state Homeowners Improvement Contractor Law, which is why the city encourages a licensed contractor to take it out.
cambridgema.gov. Read on October 9, 2026.
Structures in historic or neighborhood conservation districts, or designated as landmarks, need approval from the Cambridge Historical Commission before a building permit.
cambridgema.gov. Read on October 9, 2026.
Cambridge: scope
The city's general rule is that anyone who alters a structure must get a building permit from an Inspectional Services building inspector before work starts.
cambridgema.gov. Read on October 9, 2026.
Cambridge: where to apply
Building permits, including the roof permit, are applied for through the city's online application links.
cambridgema.gov. Read on October 9, 2026.
Cambridge: what we could not confirm
- Review time. We did not find this stated on the Cambridge pages we checked on October 9, 2026. Ask the Cambridge permit office before you rely on it.
Questions
Do I need a permit to replace a roof in Cambridge?
Cambridge offers a separate online building-permit application for roofs, next to those for new construction, additions and alterations, siding and solar.
Who applies for the roofing permit in Cambridge, the owner or the roofer?
As an exception to the general requirement, building permits are also issued to homeowners doing work on one- or two-unit dwellings where they live or intend to live.
How long is a Cambridge roofing permit valid?
Work must start within six months of the permit date and then continue to completion.
What does the Cambridge roofing permit cost?
$15 per $1,000 of declared value (or part of it). For a job declared at $15,100 in Cambridge the permit comes to $240.
Planning a re-roof in Cambridge? Describe the job once and we send it to one local roofer, not five.
Start an inspection requestOther cities
Information, not legal advice. Rules change; every statement above carries the page it was read from and the date we read it. The city’s own text governs.