Basements, In-Law Suites & ADUs
Basement Remodeling Greater Boston homeowners rely on begins with moisture control, proper insulation, and code-compliant planning. We finish basements and build ADUs across the North Shore with safe layouts and durable materials.
We handle waterproofing, egress windows, plumbing, electrical, insulation, and full finish work.
Service Overview
Finished basements and ADUs add flexible space and long-term value. We focus on dry, safe rooms that integrate with your home’s structure and systems.
Whether you’re planning a family room, office, or an ADU for extended family or rental, we manage the entire build from moisture mitigation to finishes.
All projects follow Massachusetts building standards and egress requirements for finished basements.
Why Basements & ADUs Matter
Basements and ADUs require waterproofing, insulation, egress, and code compliance. Cutting corners leads to cold, damp, or unsafe spaces.
Done correctly, these spaces feel like a natural extension of the home and add meaningful long-term value.
Basement Remodeling Greater Boston: What’s Included
We build basements and ADUs as safe, durable, comfortable living space with modern systems and code compliance.
- Moisture mitigation & waterproofing
- Framing, insulation, drywall
- Lighting and electrical upgrades
- Flooring: LVP, carpet, tile
- New bathrooms or laundry rooms
- Kitchenettes or full kitchens
- Egress windows for bedrooms & ADUs
- Soundproofing where needed
Our Process
We build basements and ADUs step-by-step to meet code and deliver a durable finished space.
- Assessment & Code Review
- Layout & Mechanical Planning
- Waterproofing & Framing
- Rough-Ins
- Finishes & Walk-Through
Why Choose G&C for Basements & ADUs
We focus on safety, durability, and code compliance—the areas most contractors overlook in basement and ADU work.
- ADU code experience
- Moisture & egress expertise
- In-house plumbing and trades
- Clean, modern finishes
- Guidance on local ADU permitting
Frequently Asked Questions
Do I need a permit to finish my basement in Massachusetts?
Yes. Most finished basement projects require permits for framing, electrical, plumbing, insulation, and egress. We handle permitting and inspections to ensure everything meets Massachusetts building standards.
What are the egress requirements for a finished basement?
Bedrooms in a finished basement must have proper emergency egress, typically through a code-compliant window or exterior door. Egress windows must meet minimum size and accessibility requirements for safety.
Can I turn my basement into an in-law suite or ADU?
In many towns, yes — but zoning rules vary. An ADU or in-law suite may require separate entrances, fire separation, and additional approvals. We help review local regulations before planning the layout.
How long does a basement remodel typically take?
Most basement remodels take 4–8 weeks depending on scope, inspections, and whether plumbing or structural work is involved.
Thinking About an ADU or Basement Remodel?
We’ll help you understand what’s needed to make the space livable.