ADUs (Accessory Dwelling Units) Built for Comfort, Flexibility & Modern Living
Your Trusted ADU Builder in Greater Boston
As a leading accessory dwelling unit ADU builder Boston homeowners trust, Flaherty Contracting specializes in crafting beautifully designed and fully code-compliant secondary living spaces. Whether you’re creating an in-law suite, a private apartment for extended family, rental housing for additional income, or a standalone backyard cottage, we build ADUs that enhance your property’s function, comfort, and long-term value.
Our team manages every step—from zoning review and architectural coordination to structural work, finishes, and final inspection—ensuring your new living space is thoughtfully designed, highly efficient, and built to last.
As an experienced additional dwelling unit housing contractor, we understand how ADUs can transform the way families use their homes. We design and build each unit to blend seamlessly with your existing property, complement your lifestyle, and meet the latest Massachusetts building and energy standards.
Whether attached, detached, above-garage, or interior conversions, your ADU will be crafted with the same level of care and craftsmanship as any full-scale home.
Why Homeowners Choose Our ADU Expertise
Zoning & Permit Expertise
We guide you through Boston-area zoning rules, permitting, and ADU compliance.
Custom Layouts Tailored to Your Property
Efficient designs that maximize comfort, privacy, and usable space.
In-Law Suite Specialists
Private, accessible spaces ideal for multi-generational living or guest accommodations.
Rental-Ready Builds
High-quality construction designed to meet modern standards for long-term renters.
Seamless Architectural Integration
Your ADU will look and feel like a natural extension of your home.
Modern Energy Savings
Modern materials and systems that boost comfort, and reduce energy costs.
Our Frame-to-Finish ADU Services Include
Site evaluation & ADU feasibility review
Full zoning & permit coordination
Architectural & engineering collaboration
Foundation, framing & structural upgrades
Energy-efficient electrical, plumbing & HVAC
Kitchenette & bathroom installations
Accessibility options for aging family members
Final inspection, walkthrough & handover
As trusted ADU contractors, we ensure your accessory dwelling unit adds lasting value, enhances functionality, and integrates seamlessly with your home and property.
Let’s Build a Space That Elevates Your Entire Home
No matter the size or scope of your project, whether you're expanding your living area, transforming outdated rooms, or reimagining your home from the ground up, our team guides you through every step with clarity and confidence. At Flaherty Contracting, we bring skilled craftsmanship, efficient project management, and trusted Greater Boston expertise to every build.
Let’s create a beautifully designed, highly functional space that enhances the way you live today and adds long-term value to your home.
Let’s Build Something Exceptional Together
Share your project details, and our team will reach out to discuss your vision, timeline, and next steps. Whether you’re planning a new custom home, an addition, or a full renovation, we’ll guide you through every stage from initial design to final walk-through. Our goal is to make the process smooth, transparent, and tailored to your needs.
Let’s turn your ideas into reality with craftsmanship, quality, and care that stand the test of time.