Turn Your Properties IntoIncome Machines.
We build premium ADUs for Massachusetts investors with multiple rental properties. Our full in-house team handles everything — design, permits, engineering, and construction — delivered on schedule, every time.
Why Smart Investors Choose Us
We are not a general contractor who dabbles in ADUs. This is all we do, and we do it better than anyone in Massachusetts.
Built for Investors, Not Homeowners
We understand your world — yield, cap rate, and portfolio scale. Every ADU we build is designed to maximize your rental income and property value.
Full In-House Team
Architects, engineers, and builders all under one roof. No subcontracting surprises. One team, one contract, one point of contact from start to finish.
We Handle All Permits
Massachusetts permitting can be a nightmare. We manage every application, inspection, and approval in-house — you never have to deal with the town hall.
Fully Insured & Legitimate
We are fully licensed and insured in Massachusetts. You are protected at every stage of the build. No shortcuts, no surprises.
Delivered On Schedule
We set realistic timelines and we hit them. Your rental income starts the day we said it would — not weeks or months later.
Multi-Unit Discounts
Own multiple properties? We offer special pricing for investors who want to build ADUs across their entire portfolio. Scale your income faster.
Our Services
Everything you need to add an ADU to your portfolio — design, engineering, permitting, and construction — all handled by one in-house team.
Everything Done In-House. Nothing Outsourced.
From the first sketch to the final inspection, our team handles every step. You get one contract, one team, and one clear price — no surprises.
How It Works
A clear, simple process with no surprises. From your first call to your first rent check.
Free Consultation
We meet with you, review your properties, and tell you exactly what is possible and what it will cost. No fluff, no pressure.
Custom Design
Our architects design your ADU to match your property and your rental goals. You approve every detail before we break ground.
Permits & Approvals
We handle all the paperwork with your local town or city. You do not have to make a single call to a government office.
Construction Begins
Our builders get to work with premium materials and a clear timeline. You get regular updates so you always know where things stand.
Final Inspection & Handover
We walk through the finished ADU with you, get the certificate of occupancy, and hand you the keys. Ready to rent on day one.
Built to Impress. Built to Last.
Every ADU we build is a premium product. High-end finishes, smart layouts, and the kind of craftsmanship that attracts quality tenants.
Want Something Specific? We Build It Your Way.
Have a specific layout in mind? A particular finish level? A unique site challenge? We love custom builds. Tell us exactly what you want, and our architects will design it from scratch.
The Numbers Don't Lie
An ADU is one of the best investments you can make on a property you already own. Use the calculator below to see your real numbers.
ROI Calculator
Adjust the sliders to match your situation.
Estimates assume 12% operating expenses. Actual results vary by location and property.
Studies show ADUs increase property value by 20–35% on average. A well-built ADU typically adds more value than it costs to build — meaning your equity grows the day construction ends.
The 5-Year Picture
ADU is built and rented. Rental income begins immediately.
Rental income covers mortgage interest or HELOC payments. Net cash flow turns positive.
Project is paid for. Every dollar of rent from here on is pure profit on top of your existing portfolio.
Property value has increased. You can refinance, pull equity, and build your next ADU.
You Don't Need Cash in Hand to Build
Most of our investors finance their ADU builds using equity they already have. Here are the four most common options — and we can connect you with trusted lenders for each one.
Tap the equity you already have in your rental properties. A HELOC gives you a revolving credit line — you draw what you need, when you need it. Interest rates are typically lower than construction loans, and interest may be tax-deductible as a business expense.
Refinance one of your existing properties at a higher loan amount and pocket the difference. If your property has appreciated significantly, you may be able to fund your entire ADU build with no out-of-pocket cash.
A construction loan is specifically designed for building projects. Funds are released in stages as construction progresses. Once the ADU is complete, it typically converts to a permanent mortgage. Many Massachusetts lenders now offer ADU-specific products.
MassHousing offers specific loan products for ADU construction on owner-occupied properties in Massachusetts. Rates are competitive and the program is designed to support the state's housing goals. Ask us for a referral to a MassHousing-approved lender.
Not Sure Which Option Is Right for You?
During your free consultation, we will walk through your current portfolio, your equity position, and help you figure out the best way to fund your build — at no cost to you.
What Investors Are Saying
"I own eight rental properties in the Boston area and I was nervous about adding ADUs. These guys made the whole thing simple. They handled every permit, stayed on schedule, and the quality is outstanding. I am already planning my next three."
"I have worked with three different contractors over the years. ADU Investment is in a different league. They show up when they say they will, they do what they say they will do, and the finished product looks incredible. My tenants love it."
"The in-house permitting alone is worth it. I spent six months fighting with the town on a previous project. These guys had my permit approved in three weeks. The ADU was done in four months and I had a tenant signed before the paint was dry."
Ready to Add Income to Your Portfolio?
Massachusetts ADU law has made it easier than ever to build. Let's talk about your properties and what is possible.
Let's Talk About Your Portfolio
Fill out the form and Julian will personally review your situation and call you within one business day. No sales pitch — just a straight conversation about what is possible for your properties.
Schedule Your Free Consultation
Tell us about your portfolio. The more detail you share, the better we can prepare for our call.