Accessory Dwelling Unit

Frequently Asked Questions

Godfrey Design-Build | ADU Remodeling in Beverly, MA

• What is an accessory dwelling unit (ADU)?

  An ADU is a secondary, self-contained living unit on the same property as a primary home. It generally includes facilities for sleeping, cooking, and bathing, along with an appropriate entrance. ADUs can support family living arrangements or provide a separate residence on the property.

• Can I build an ADU on my property in Beverly, MA?

  Massachusetts has expanded opportunities for qualifying ADUs, but each property still needs a feasibility review. Building code, dimensional standards, utilities, site conditions, and applicable local rules can affect the design. We recommend evaluating the property before settling on a floor plan or budget.

• What kinds of ADUs can Godfrey Design-Build create?

  Possibilities include a detached backyard cottage, an attached addition, or a conversion of suitable existing space such as an attic or area above a garage. The best choice depends on privacy, access, available space, structural conditions, and how the unit will be used.

• How large can an ADU be in Massachusetts?

  Massachusetts rules generally describe a protected-use ADU as no larger than 900 square feet or half the gross floor area of the principal dwelling, whichever is smaller. Other requirements may apply, and regulations can change. We verify the standards relevant to your property during planning.

• Can an ADU be used for an aging parent or adult child?

  Yes. An ADU can give a family member greater independence while keeping relatives nearby. We consider separate access, sound privacy, storage, comfortable circulation, and features that may make the space easier to use as needs change.

• Can I rent out an ADU for additional income?

  An accessory dwelling unit (ADU) may offer an opportunity to generate rental income while adding flexibility and value to your property. Whether you can rent it out - and under what conditions - depends on local zoning, state regulations, and property-specific requirements. Long-term rentals and short-term rentals may be subject to different rules, including restrictions on occupancy or rental duration. If rental income is part of your investment strategy, we recommend confirming the applicable requirements early in the planning process so your design and budget reflect what's permitted.

• How much does it cost to build an ADU?

  The cost of an accessory dwelling unit (ADU) depends on the type of project, the property's existing conditions, and the features you want to include. Converting an existing garage or basement can involve different costs than building a new, standalone structure. Foundation work, structural modifications, utility connections, site access, and interior finishes all influence the investment. Because an ADU typically includes a kitchen and bathroom, plumbing, electrical, and mechanical systems are important parts of the budget. At Godfrey Design-Build, we evaluate your property, explore design possibilities, and define the project scope to help establish a realistic budget tailored to your goals.

• Does an ADU need its own entrance and utilities?

  An ADU needs an entrance that satisfies applicable requirements, and its kitchen, bathroom, heating, electrical, and other systems must meet relevant codes. Whether utilities can be shared or need separate connections depends on the design and local service conditions.

• How long does ADU design, permitting, and construction take?

  The timeline for an accessory dwelling unit (ADU) depends on whether you're converting existing space or building a new, detached structure. The overall process includes evaluating the property, developing the design, coordinating utilities, obtaining necessary permits and approvals, and completing construction. Site conditions, project complexity, and local review requirements can all affect the schedule. At Godfrey Design-Build, we identify the key stages early and develop a project-specific timeline based on your property, goals, and the approvals required, so you have a clearer picture of what to expect from planning through completion.

• How can an ADU complement our home’s architecture and provide privacy?

  A well-designed accessory dwelling unit should feel like a natural part of your property while giving its occupants a sense of independence. We consider architectural details such as rooflines, proportions, and materials, along with the placement of windows, outdoor spaces, pathways, and lighting to balance visual cohesion with privacy for both households. Thoughtful planning can also help reduce noise and create distinct outdoor areas for each residence. The goal is an ADU that complements your existing home, makes the most of your property, and gives everyone space to feel at home.