Basement Renovation · Cambridge
Basement Apartments in Cambridge
Legal secondary-suite basement apartments in Cambridge, built to code with proper egress.
A basement apartment can turn unused space into rental income — but only if it's done to code. We build legal secondary suites with the egress, fire separation, and ceiling height the rules require.
What's included
- Legal egress windows and exits
- Fire separation and safety requirements
- Separate entrance where possible
- Kitchen and bathroom rough-in and finish
- Soundproofing between units
Our process
- Design & assess — we review your space, moisture history, and goals, then plan the layout and budget.
- Permits & prep — we handle permits, moisture control, and framing so the finish lasts.
- Build — framing, electrical, plumbing, insulation, drywall, flooring, and finishes by licensed trades.
- Walkthrough — we finish clean and walk the space with you before final sign-off.
What drives the cost? See our Cambridge basement renovation cost guide for the factors that shape your quote — every estimate is written and itemized before we start.
Frequently asked questions
Can any basement become a legal apartment?
It depends on ceiling height, egress, and lot rules — we'll assess whether yours qualifies before you commit.
Do you handle the permits and inspections?
Yes — legal suites require permits and inspections, and we manage that process end to end.
Serving Cambridge and surrounding areas. Contact us for a free, no-obligation quote specific to your project.