Waltham, Massachusetts
Your plumber is already in Waltham.
Colt Home Services works out of a shop on Felton Street. When you call about a leak in Waltham, the truck isn't coming from another town — it's coming from across yours.
- Plumbing license
- 1310027098-PL-CMA licensed
- Shop
- 99 Felton StWaltham, MA
- Service call
- Free$89 fee only if you go ahead
- Workmanship
- 5 yearsNo labor charge
- Water supply
- MWRAQuabbin / Wachusett
- Hours
- 8am–8pmMonday through Friday
Who shows up when you call?
A licensed plumber from a shop in your own city, not a dispatch network. Every job runs under Massachusetts Plumbing Business License 1310027098-PL-C, issued by the Board of State Examiners of Plumbers and Gas Fitters. William Colt, who owns the company, holds Massachusetts Construction Supervisor License CS-118144. Colt started in 2022 and is still owner-operated — not a private equity roll-up, not a franchise. We’re fully insured through Federated Insurance.
We’re a Mass Save Home Performance Contractor as well, which means we spend a lot of time in Waltham basements and attics looking at whole houses rather than single fixtures. It tends to show up in what we catch.
What does Waltham’s water mean for your plumbing?
Waltham is a full MWRA water and sewer community, according to the MWRA’s customer list. Your water comes from the Quabbin and Wachusett reservoirs, and it’s soft. If someone has tried to sell you a water softener in Waltham, you almost certainly don’t need one — that’s a Natick, Wayland or Dover problem, where water comes from local wells. We wrote up which towns around here actually have hard water if you want the detail.
Wastewater goes to the MWRA sewer system too, so drain problems in Waltham are about the pipes in and under your house and the lateral to the street — not a septic system.
Plumbing services in Waltham
Plumbing Repair
Leaks, running toilets, failed shutoffs, low water pressure, noisy pipes.
Water Heater Installation
Replacement and correct sizing, with code-compliant venting and expansion control.
Repiping
Replacing galvanized supply — whole house or one run at a time.
Boiler Repair
Steam and hot water systems — standard equipment in older two-families.
5-Year Workmanship Guarantee
We stand behind how we do the work for five years. If something fails because of our installation or repair, we come back and correct it — no labor charge.
Covers Colt's workmanship. Parts carry the manufacturer's warranty. Excludes pre-existing conditions, customer-supplied fixtures, and freeze or misuse damage. Read the full termsQuestions Waltham homeowners ask
Are you actually located in Waltham?
Yes. Our shop is at 99 Felton Street in Waltham, 02453. Most companies that rank for "plumber in Waltham" are dispatching from somewhere else.
Do I need a water softener in Waltham?
Almost certainly not. Waltham is supplied by the MWRA from the Quabbin and Wachusett reservoirs, and that water is soft. Softeners are worth considering in towns on their own wells — Natick, Wayland and Dover among them.
How much does a plumber cost in Waltham?
The service call is free. A licensed plumber comes out, diagnoses the problem and gives you a written price before any work starts. If you go ahead with the repair, there's an $89 service fee on top of that price; if you don't, you pay nothing. Estimates for installations and replacements are free. If we open something up and find more than either of us could see, we stop and quote it rather than running up the bill.
Are you open nights or weekends?
Not yet. We're open 8am to 8pm, Monday through Friday. We'd rather tell you that than promise round-the-clock service and not answer.
