Basement Renovation · Cambridge
Legal Basement Apartments in Cambridge: What's Required
A basement apartment can pay for itself — but only if it's legal. Here's what the rules require.
Secondary suites are a great way to add income, but an illegal unit is a liability. Here's what a legal basement apartment in Cambridge generally needs.
The essentials
- Minimum ceiling height
- Proper egress windows and a safe exit
- Fire separation between units
- Adequate ventilation and smoke/CO alarms
- Permits and inspections
We assess whether your basement qualifies and handle the legal suite build end to end.
Thinking about rental income? Start with a free assessment.
Frequently asked questions
Do I need a permit for a basement apartment?
Yes — legal secondary suites require permits and inspections.
Serving Cambridge and surrounding areas. Contact us for a free, no-obligation quote specific to your project.