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Bathroom remodeling in Waltham, MA
Bathroom remodels in Waltham from a crew based on Calvary Street. Waltham inspectors check the plumbing, the wiring and the waterproofing before tile goes up.
Waltham rules that apply
What Waltham requires for bathroom remodeling.
Owner signs every permit
Waltham's Building Department needs the property owner's signature on the application, and building permits are not accepted by mail except for roofing, insulation and replacement windows.
10th Edition building code
Building permit applications filed in Waltham after July 1, 2025 must meet the 10th Edition of the Massachusetts State Building Code.
Inflow and infiltration mitigation
Work that adds wastewater to Waltham's sewer must remove four gallons of groundwater or stormwater inflow for every gallon added, or, for smaller flows, pay a one-time fee in lieu if the city's sewer bank has room. The City Engineer administers it.
Source: Waltham Code, Sec. 16-32: Infiltration and inflow mitigation fee
How bathroom remodeling goes in Waltham.
Older Waltham bathrooms often sit over a joist that a past plumber notched for a drain. We check the framing under the tub or shower before setting anything heavy and sister the joist if it needs it.
Adding a bathroom where there was none can change the flow your house sends to the city sewer, which is something Waltham's inflow and infiltration ordinance tracks. If your project needs that review, we tell you at estimate time rather than at the inspection.
Questions
Bathroom remodeling in Waltham, answered.
Will adding a second bathroom in Waltham raise a sewer issue?
It can. Waltham's inflow and infiltration ordinance applies to work that adds wastewater to the sewer, and the City Engineer decides whether your project needs mitigation, so we ask early.
Our bathroom remodeling work.
See all 4 photos →
Photos from our jobs around Greater Boston.
Bathroom remodeling near Waltham.
Where this information comes from
- City of Waltham: Building Department
- Waltham Code, Sec. 16-32: Infiltration and inflow mitigation fee
- Waltham Code, Chapter 23: Delayed Demolition
- Waltham Zoning Code, Sec. 3.2 Definition of uses (3.23 ADUs)
- City of Waltham: Engineering Department
- Waltham Engineering FAQ: Where do I discharge my sump pump?
- Waltham Conservation Commission: Conservation Permit FAQ
- City of Waltham: Historical Commission
- City of Waltham: 2026-2031 Streets Under Moratorium
- Mass. DOER: Building Energy Code Adoption by Municipality
Rules change. These are summaries of Waltham's and Massachusetts' published rules as of our last check, not legal advice; your project's permits are confirmed with the town when we file them.
Free estimate
Planning bathroom remodeling in Waltham?
We'll come out, measure, listen, and send a written estimate. The visit is free and there's no pressure to sign.
Call 617-934-1875