Serving Massachusetts North Shore and Southern New Hampshire
Yankee ADU’s Custom Modular Homes
At Yankee ADUs, we are your trusted ADU Builders delivering custom, modular, and renovation solutions that transform underutilized spaces into fully functional, stylish accessory dwelling units. From planning and design to installation, we focus on creating practical, efficient, and comfortable ADUs tailored to your lifestyle.
Custom ADU Solutions for Every Property
As specialized ADU builders, we offer full range of services including modular ADUs, on-site custom builds, and ADU renovations. Whether you are considering a modular or on-site build, we provide solutions designed to match your lot, architectural style, and living needs. Our team works closely with each homeowner to deliver custom ADU solutions that maximize space, utility, and property value.
Modular ADUs: Made in New England
Our modular ADUs are constructed in a climate-controlled factory in South Paris, Maine for precision and efficiency. You are welcome to visit the factory. These adu modular homes arrive on-site ready for installation, significantly reducing construction timelines and minimizing site disruption. The result is a durable, energy-efficient backyard ADU or detached ADU that is move-in ready within just a few weeks of delivery.
The Benefits of Working with Yankee ADUs
As experienced ADU Builders, we combine craftsmanship, design expertise, and regulatory knowledge to deliver units that exceed expectations. We have intentionally partnered with a local manufacturer rather than ship from outside of New Engalnd. Choosing our team ensures:
- Full-service ADU construction: We handle all permits, inspections, and engineering
- Versatile design options: From modular granny flats to 2 bedroom ADU layouts
- Energy-efficient systems: Minisplit heating/cooling and electric hot water heaters
- All-inclusive pricing: Covers foundation, sitework, utilities, and installation
- Compliance with Massachusetts and New Hampshire ADU laws
Whether you are exploring modular ADU options, planning an on-site build addition, or upgrading existing spaces, our team delivers solutions built to last.
ADU Design Ideas and Customization
Yankee ADUs works with homeowners to create ADU design ideas that reflect individual lifestyles. Our offerings include:
- Open and functional floor plans for small modular homes or 2 bedroom, up to 950 sq, ft. ADU’s.
- Custom ADU dwelling layouts for attached or detached ADU units
- Thoughtful integration of accessory dwelling units into existing landscapes and homes
- Options to build an ADU that serves as rental income (you can rent to anyone), senior housing - a great alternative to assisted living - or extended family living.
Why Modular?
- Our modular homes are custom designed to meet your needs.
- Yankee modular homes are built in a climate controlled environment, which means the skilled crew is working in ideal conditions rather than rain, snow, extreme heat or cold.
- Since modular homes are built to be transported as well as lifted by a crane, each modular must be extremely solidly built and is more impervious to extreme weather conditions than on-site build.
- Time savings: While the modular home is being built in the factory, your site is being prepared. Modulars are usually ready to ship to your site 8-10 weeks after order.
- Delivered complete with wiring, plumbing, kitchen, bathrooms, flooring and all finish that is not susceptible to vibrations during transport.
- Quick turnaround once delivered to the site.
- Efficiently build with minimal waste.
- Built in New England for New England conditions.
- Meet the highest local building and energy code requirements.
Navigating Permits and Regulations
Massachusetts and New Hampshire have both passed laws to greatly simplify the process of permitting ADUs.
If you have a single family or multi-family home, we can put an ADU on your lot as long as it fits within the required setbacks, does not extend beyond the front of the house and does not exceed allowed lot coverage.
Parking must be provided unless you are near public transportation.
Town Sewer or Private Septic?
Town sewer is easy. For private septic, we need to comply with the number of bedrooms it can serve. If you have a 4 bedroom septic and a 4 bedroom house, then we have to add to your septic system. This is part of our evaluation.
It is possible, if you don’t need 4 bedrooms in your main house,, you can deed restrict your house to 3 bedrooms and remove the door and bed from one of the bedrooms. Then you can add a one BR ADU. Whatever the case, an official inspection is required (in MA, Title V).
Cost of septic systems updates vary greatly with inspection results, conditions and local requirements.
Understanding ADU Construction Cost
The ADU construction cost depends on size, design complexity, and site conditions. For reference, small modular units start around $175,000, with a two-bedroom, 900 sq. ft. ADU house costing approximately $300,000 to $400,000. Unlike some ADU manufacturers who quote base prices, Yankee ADUs provides all-inclusive pricing covering everything from ADU building plans, foundation, utilities, and final inspections. The cost range reflects differences in each site, and will be discussed at our first meeting.
Our transparent approach ensures no hidden costs and allows homeowners to compare the value of modular ADU cost versus on-site custom construction.
Seamless Installation Process
For prefab ADU homes, delivery typically occurs within 10 weeks after your order.
The site is prepared, utilities are connected, and foundations are set while the unit is being buildtin the factory.
Site work is done simultaneously so once the unit arrives, crane placement and installation are completed efficiently, creating a move-in-ready ADU dwelling unit in as little as 3-4 weeks.
Financing Options
There are a variety of financing offers for ADU’s in Massahusetts and New Hampshire. We highly recommend a conversation with Tom Godbout at thomas.godbout@primelending.com or 617-784-8196 to explore the best and most suitable options for you.
Start Your ADU Project Today
If you are ready to explore an ADU for your Massachusetts or New Hampshire Property, Yankee ADUs provides free site evaluations, customized design consultations, and full project management. From modular homes to on-site built ADU conversions, we deliver functional, attractive, and compliant accessory dwelling units that enhance your property and lifestyle.
Call us or email to schedule your free consultation today.
Yankee ADU’s
Transforming ADU Living with Elegance
Newburyport MA
+978-518-1481
john@yankeeadus.com