Contact Us:
774 222 0127
Trusted ADU
Builders in Boston
We specialize in building high quality accessory dwelling units by handling everything — from design and permitting to construction and delivery.
High-Quality, Fully Custom Built ADUs
We make adding an ADU to your property feel exciting, not stressful — with a clear
process and a trusted team guiding you every step of the way.
Matches Your Home
While we offer proven floor plans, your ADU is fully customizable to your needs. From size and layout to finishes, utilities, and colors, we work with you to create a space that fits your property and lifestyle perfectly.
Built On Schedule
Our streamlined process keeps your project moving smoothly from start to finish, with most ADUs completed in 6–12 months
Stick Built Construction
All our ADUs are stick built on your property, just like a traditional home. This approach minimizes disruption to your yard and avoids the extra costs associated with prefabricated units.
Move-In Ready
Once complete, your ADU is fully finished and move-in ready. From painted walls and cabinetry to a stackable washer and dryer, fridge, stove, and full utility hookups, everything is ready for you from day one.
Choose Your ADU Size
Studio
Our Studio ADUs are ideal for a single person, a private office, or a creative workspace. Compact yet functional, they’re perfect for maximizing your backyard while providing a versatile living or working space.
1 Bedroom
The 1-Bedroom ADU offers a traditional layout with plenty of space for an individual or couple. Perfect for a private rental, a guest suite, or giving a loved one their own independent living space.
2 Bedroom
Our 2-Bedroom ADU is the most spacious option, designed for small families, multigenerational living, or generating rental income. Comfortable, fully functional, and ready to match your lifestyle.
What Our Clients Are Saying
★ ★ ★ ★ ★
" We had a great experience collaborating with Horizon ADU. The team was professional, responsive, and easy to work with. Highly recommend! "
– James Henry
★ ★ ★ ★ ★
"We recently had Horizon ADU build a detached accessory dwelling unit on our property and the entire experience was outstanding from start to finish. Eric and this team listened carefully to our goals, provided a clear feasibility assessment, and guided us through all of the permitting, design, and financing steps with transparency and professionalism."
– Garry Vilnits
★ ★ ★ ★ ★
"I reached out to Horizon ADUs to learn more about building an ADU on my property, Eric was extremely helpful and informative. They took the time to explain the process, answer all my questions, and provide clear guidance about costs, timelines, and design options."
– Casey Twohig
What We Build
As leading ADU builders in Boston, we focus exclusively on detached ADUs. We chose this project type in order to develop a specific expertise and create a streamlined, repeatable process that offers the best experience to our customers.
Detached ADUs
Elevate your property with a detached ADU, ideal for multigenerational living, guest quarters, or added rental income. We handle everything from start to finish, adding value to your life and property.
Two Story ADUs
Built on the same property as the main home, a two-story ADU provides two levels of living space, perfect for in-law suites, guest accommodations, or rental income.
Backyard Office/Studio
Our modern, functional office solutions are designed to boost productivity by providing a private workspace that minimizes distractions and supports focused work.
Your ADU is in Good Hands!
We make building your ADU easy and stress-free by guiding you through every step — from initial design and permitting to construction and delivery.
- Are you thinking about adding an ADU to your property in Boston but have questions?
- Not sure how the process works or what will fit on your lot?
- Want clarity on your options and what’s feasible for your property?
- Looking for guidance before making any commitments?
Schedule Your
FREE Discovery Call
Book a no-cost conversation with our experts. We’ll listen to your goals, review your property, and provide a high-level assessment of feasibility — so you can make informed decisions with confidence.
We respect your privacy and will never rent or sell your information.
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