ADU Construction Services in Greater Boston

Accessory Dwelling Units (ADUs) Built for Living, Earning, and Lasting
From design to permits to move-in day, Honorato Company crafts functional and beautiful ADUs, giving you space that adds value, flexibility, and elegance to your property.
Why Choose Honorato Company to Build Your ADU in Greater Boston?
Building an ADU is your opportunity to create a thoughtful space that offers new options for your daily experience and long-term plans. Honorato Company combines expertise, transparency, and craftsmanship to ensure your ADU is a code-compliant, lasting investment in your property’s value and versatility.
White Glove Construction Experience
From coordinating designers to sourcing premium finishes, our team manages the details so you can focus on the big picture.
High-Performance, Luxury Finishes
We design and build Accessory Dwelling Units that are as beautiful as they are functional, incorporating high-end finishes, smart home technology, and custom features that make the space truly exceptional.
Transparent Process & Communication
Weekly updates, real-time budget tracking, and clear timelines keep your project on track and give you confidence at every stage of our work together.
Key Benefits of Building Your ADU with Honorato Company
Budget-First Approach
Our pre-construction development process ensures your ADU fits your budget and suits your property, eliminating costly surprises.
Undeniable Craftsmanship
From custom millwork to universal design, our quality shows in every detail, because shortcuts don’t build legacies.
Permit & Code Experts
Zoning and permitting are often the toughest part of building an ADU. We work with your city to ensure compliance with Massachusetts regulations, freeing you to focus on design and lifestyle.
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Honorato Company combines thoughtful design, structural expertise, and seamless construction management to deliver high-quality results for Greater Boston homeowners
Honorato Company's Design-Build Process
INITIAL CONSULTATION (DISCOVERY PHASE)
Every great project starts with a conversation. This phase consists of the following.
Discuss Your Goals: What are your priorities? What’s your timeline and budget?
Evaluate Feasibility: For larger or more complex projects, we might review zoning codes, property valuations, or other factors that could impact your plans.
Recommend Next Steps: This could involve a site visit to gather measurements and photos or a discovery call to iron out project details.
PRE-CONSTRUCTION DEVELOPMENT
We dig deep into the details early to ensure your project’s success.
Budget Alignment: We create a preliminary estimate with a clear cost range based on your vision.
Video Walkthroughs: Every estimate is accompanied by a personalized video that explains costs, inclusions, and variables.
Transparent Communication: Using Buildertrend, our project management software, you’ll stay updated on progress, timelines, and budgets.
DESIGN AND MATERIAL SELECTIONS
Here’s where your project takes shape.:
Collaborative Design: Because our builders and designers are already accustomed to working together, we easily integrate construction design with architectural elements to ensure every detail meets your expectations.
Material Selection Support: Whether you prefer vendor visits or digital consultations, we help you choose everything from fixtures to finishes.
Refined Scope of Work (SOW): As you make selections, we adjust estimates and timelines for complete transparency.
PERMITTING AND APPROVALS
Permitting can often feel like a hurdle, but we make it seamless by managing the process for you:
Local Expertise: As one of the leading design-build contractors in Boston, we understand the city’s permitting requirements.
Streamlined Approvals: We prepare and submit all necessary documentation to keep your project compliant and moving forward.
CONSTRUCTION AND EXECUTION
With plans finalized and permits in hand, it’s time to bring your vision to life.
Efficient Project Management: Our experienced team coordinates every aspect of construction, ensuring quality and timeliness.
Real-Time Updates: Using Buildertrend, you’ll have access to daily logs, photos, and financial updates.
Proactive Problem-Solving: Unexpected issues? We tackle them head-on while keeping you informed.
FINAL WALKTHROUGH AND COMPLETION
Your project isn’t finished until you’re completely satisfied.
Comprehensive Walkthrough: We review every detail with you to ensure the final product exceeds your expectations.
Client Satisfaction: Any remaining touch-ups or adjustments are handled promptly.
Celebration: This is where we hand over the keys and toast to your newly transformed space!
Frequently Asked Questions About ADU Construction Near Boston
What is an ADU?
An ADU (Accessory/Auxiliary Dwelling Unit) is a secondary living space on the same property as your primary home. This can be a backyard cottage, basement living space, in-law suite, or converted garage that has its own kitchen, bathroom, and private entrance.
Are ADUs legal in Massachusetts?
Yes! Many Massachusetts towns, including Newton, Lexington, and Brookline, allow ADUs under specific zoning rules. Regulations vary by town, so our team guides you through what’s possible on your property and secures the necessary permits before we begin.
How much does it cost to build an ADU in Greater Boston?
Costs depend on size, type (detached, attached, garage conversion, basement), and finish level. In general, ADUs in Greater Boston range from $250,000 to $600,000+. We provide a transparent estimate during our pre-construction phase, so you know exactly where your investment stands.
Is financing available for ADUs?
Yes. We offer access to flexible financing through Enhancify, with 60-second applications and over 30 competitive options including HELOCs and unsecured personal loans.
How long does it take to build an ADU?
From design through permitting and construction, most ADUs take 8–12 months. Detached ADUs may take longer due to site prep and utilities, while conversions can move more quickly.
Can I design my ADU to match my home?
Definitely. We specialize in custom design-build projects, so your ADU will complement your home’s style. We happily replicate modern, contemporary, or classic New England architecture.

Financing Options Available
Where We Work
- Lexington, MA
- Newton, MA
- Chestnut Hill, MA
- Brookline, MA
- Winchester, MA
- Natick, MA
- And more!
Don’t see your location? No problem! We are always expanding our reach across the Greater Boston area.

Boston Area Remodeling & Custom Home Cost Guide
Preparing for a remodel or custom home project should come with clarity, not guesswork. This guide was created to give you a transparent understanding of what it truly takes to bring a high-end project to life in the Greater Boston area, with a process rooted in transparency and collaboration so you have a clear picture of costs, timelines, and key decisions from day one.
- Clear investment ranges for home remodels, additions, and custom homes
- Insight into what truly drives cost, including design complexity, materials, and construction scope
- Real examples of finishes and features at different investment levels
- Guidance to help you make confident, well-informed decisions before construction begins
Honorato Company is rated 4.8★ on Google. Read our reviews!