ADU Builders in Westwood, MA
Accessory Dwelling Units
In Westwood, MA, crafting a custom Accessory Dwelling Unit unlocks a powerful blend of expanded living space and increased property value tailored to the town’s family-oriented lifestyle. With Westwood’s progressive zoning policies, homeowners can seamlessly create versatile homes that accommodate multigenerational needs while enhancing neighborhood charm.


ADU Types We Build in Westwood, MA
In Westwood, MA, homeowners can choose from several ADU styles to suit their needs. Detached ADUs offer complete privacy and a separate entrance, creating an ideal space for guests or rental income. Attached ADUs seamlessly blend with your existing home, enhancing accessibility without sacrificing comfort. Meanwhile, garage conversions transform underutilized space into a cozy living area, maximizing your property’s potential without expanding the footprint.


Studio ADU
A compact, efficient layout for one person — perfect for a caregiver, aging parent, or rental tenant.


One-Bedroom ADU
Ideal for aging-in-place, caregivers, or long-term rental use with a private bedroom and full bath.


Two-Bedroom ADU
Best for multigenerational living, small families, or maximizing rental income potential.


Garage Conversion ADU
Convert an underused garage or build a finished apartment above it into a fully independent living space.


Detached ADU
A standalone backyard cottage with maximum privacy and clear separation from the main home.


Attached ADU
An addition connected to your home — ideal when you want shared utility runs and convenient access.


Quality Finishes, Built to Last
Navigating ADU zoning and permitting in Westwood, MA requires a deep understanding of local regulations and detailed coordination with the town hall. Our contractor expertly manages every step of the approval process, ensuring a smooth experience from application to final permit.
Our ADU Process in Westwood, MA
Step one: We dive into your property’s potential, crafting a custom ADU design that fits Westwood’s charm and your lifestyle like a glove. Next, we navigate the paperwork jungle, securing every permit with precision so your project sails through local approvals without a hitch. Then, our skilled crew brings blueprints to life, building your new space efficiently while keeping your daily routine undisturbed. Finally, we stroll through your finished ADU together, fine-tuning details and ensuring your complete satisfaction before handing over the keys to your fresh, versatile retreat.
1. Feasibility & Site Fit
We confirm what your Westwood lot can support: placement, access, utilities, parking, and the path to approvals. You get a clear go/no-go before spending money on drawings.
2. Design & Planning
We translate your goals into a buildable plan — layout, materials, and a detailed scope — structured for a smooth route into permitting and construction.
3. Permits & Approvals
We manage the permit process with Westwood’s Building Department, including plan sets, site plan, energy code documentation, and sewer/septic approvals as applicable.
4. Construction & Closeout
We manage the full build — site work, framing, MEPs, insulation, finishes, and the inspection sequence needed to close the permit and move toward occupancy.
ADU Zoning & Permitting in Westwood, MA
- Massachusetts law allows one ADU “by right” in single-family zoning districts, subject to reasonable local regulations and building/septic code requirements.
- ADU size is capped at the lesser of 50% of the principal dwelling’s gross floor area or 900 sq ft statewide.
- Owner-occupancy requirements cannot be imposed on protected-use ADUs under Massachusetts law.
- Westwood homeowners should confirm local setback, parking, and permitting requirements with the Building Department before beginning design work.
- All ADUs require a separate entrance that meets safe egress standards under state building code.
Disclaimer: Zoning and code rules can change, and site conditions vary. We confirm your Westwood property’s requirements early in the process and guide you through a compliant, documented permit path.
Frequently Asked Questions — ADUs in Westwood, MA
Build Your ADU in Westwood, MA
Ready to add an accessory dwelling unit to your Westwood property? Contact Regulus Construction today for a free, no-obligation consultation. We respond within 24 hours.
Fill out the form on our contact page and one of our team members will reach out within 24 hours to discuss your project.
