Your Medford MA ADU Contractor:

Let Us Help You Understand ADU Rules and Regulations

If you're considering building an Accessory Dwelling Unit (ADU) in Medford, MA, you're not alone. With rising housing demands and property values, homeowners are looking to maximize their space—and income—through smart, legal additions like ADUs. Whether you're planning a backyard cottage or a Medford, MA basement ADU, knowing the local regulations is critical to a successful project.

At FiveTen Construction & Design, we specialize as a trusted Medford, MA ADU contractor, helping homeowners navigate every step of the process—from design to construction.

What Is an ADU?

An ADU (Accessory Dwelling Unit) is a secondary, independent living space located on the same property as a primary home. In Medford, MA, ADUs can be attached (like a finished basement or in-law suite) or detached (like a small cottage or garage apartment).

An ADU is a complete, self-contained home featuring a kitchen, bathroom, and living area—all in one compact design. It's a smart way to create extra space, earn rental income, or provide a private living area for family, without the hassle of moving or purchasing a new property.

ADU Options in Medford, MA

At FiveTen Construction & Design, we specialize in building ADUs in Medford, MA, helping homeowners create beautiful, functional spaces that add value and flexibility. Depending on your property and goals, we can guide you to the right type of ADU:

Detached ADUs: A fully independent structure, perfect for rental income, guest homes, or private offices. Offers maximum privacy and design flexibility.

Attached ADUs: Built onto your existing home, these units share a wall but have separate entrances and complete amenities—ideal for family members or tenants.
Garage Conversions: Transform your unused garage into a cost-effective ADU, maximizing living space without expanding your footprint.
Basement ADUs: Many homes in Medford, MA have basements perfect for conversion. As an experienced basement ADU contractor, we know how to turn underutilized lower levels into stunning, income-generating apartments or needed space for family.

Each ADU type comes with unique zoning, access, and utility requirements.We will walk you through every step, ensuring you choose the best solution for your property and investment goals. Whether you're building a detached unit or a basement ADU in Medford, MA, we're here to help you get it done right.

ADU Rules to Know

Here’s a quick overview of what you need to understand before moving forward:

Owner-Occupied Requirement: In Medford, the property owner does not need to live on the premises.
Size Limits: The ADU must be smaller than the primary home. In Medford, MA the maximum size allowed is up to 900 square feet, but this can vary depending on the zoning district.
Parking: An additional off-street parking space is generally required. However, if you're within ½ mile of a transit station this is not a requirement.
Entrance: A separate entrance is usually needed, though it can share a landing or porch with the main home.
Utilities: Separate utility are not be required.
Limitations: No more than one accessory dwelling unit may be established in a lot
Occupancy Term: A minimum occupancy or rental term in Medford, MA is 30 days.

If you're unsure how to interpret these rules, partnering with a Medford, MA ADU contractor like FiveTen Construction & Design ensures your project is compliant—and stress-free.

Legal Uses for an ADU

Accessory Dwelling Units (ADUs) are intended to support long-term, sustainable housing—not for quick turnover rentals. Here's what you can (and can't) do with your ADU in Medford, MA:

✓ Permitted Uses:

Rent your ADU as a long-term rental to create consistent income. Medford, MA required a minimum occupancy or rental term of 30 days.
Support multi-generational living (ideal for aging parents, adult children, or live-in caregivers).
Use it as a home office, art studio, or private guest space.

✗ Not Permitted:

Short-term rentals (like Airbnb or VRBO) are typically restricted unless specifically allowed by Medford city regulations
Selling your ADU separately from the main home is not permitted

If you're planning a basement ADU in Medford, MA, or working with a basement ADU contractor, it's important to understand these rules early on. We’ll help you navigate local zoning so you can make the most of your investment!

Why Medford Is Ideal for ADUs

Medford’s unique blend of historic homes and updated zoning laws creates an exciting opportunity for ADU development. Many properties in Medford offer the ideal space for detached ADUs, garage conversions, or basement units. As a leading Medford, MA ADU contractor, we stay current with all local ADU regulations to ensure your project complies with city codes and moves forward smoothly.

In Greater Boston’s competitive housing market, adding a Medford, MA ADU is a smart strategy for creating multigenerational living space or generating steady rental income. Our team customizes every project to fit your lot size, design style, and lifestyle needs—whether you prefer a modern, traditional, or custom aesthetic.

An ADU Building Code Overview

Whether you're converting your basement or building a new accessory dwelling unit, our team at FiveTen Construction & Design—your trusted Massachusetts ADU contractor—will ensure your project meets all state and local building codes. We handle all the details, including:

1-hour fire separation between the main home and the ADU
Proper ventilation and access to natural light
Minimum room size of 70 square feet and ceiling height of at least 7 feet
Two safe exit routes (means of egress) for emergency access
Interconnected smoke and carbon monoxide detectors for enhanced safety
Full compliance with Massachusetts' Stretch Energy Code for energy efficiency

If you're considering a basement ADU conversion in Medford, MA, or need an experienced basement ADU contractor, we’ll guide you every step of the way—from design through final inspection.

Why Choose FiveTen Construction & Design as Your Trusted Medford, MA ADU Contractor?

Building an ADU in Medford, MA is more than just another renovation—it’s about creating a fully legal, livable residential unit that adds long-term value to your property. From complex permitting and zoning reviews to strict building code inspections, the process can be overwhelming without the right partner. That’s why working with an experienced Medford, MA ADU contractor like FiveTen Construction & Design is key to a smooth, successful project.

Whether you’re building a detached ADU, adding an attached unit, or planning a basement ADU conversion in Medford, MA, we have the expertise to guide you every step of the way. Basement ADUs, especially, require a specialized approach to meet Massachusetts’ strict building codes—and as your trusted basement ADU contractor, we know how to deliver exceptional results without costly delays.

What You Can Expect When You Partner with FiveTen Construction & Design:

Personalized Consultation

We start by learning about your vision, needs, and long-term goals. Whether you're planning a detached ADU, garage conversion, or basement ADU in Medford, MA, we’ll walk you through all available options while ensuring full compliance with Massachusetts ADU regulations.

Customized ADU Design

If you're considering a basement ADU, we’ll create smart layout options, provide detailed renderings, and plan every square foot for maximum functionality. For detached or attached ADUs where architectural and engineered plans are required, we help you to review the plans and details to ensure your design will be beautiful and the livable spaces maximize natural light, privacy, and overall flow—which making sure your Medford ADU meets your goals and exceeds your expectations.

Transparent Budgeting

Budget clarity is critical. We provide detailed, accurate estimates and work closely with you to select finishes and materials that align with your vision and price range. Our project management system ensures you stay informed, empowered, and confident at every stage.

Expert Permitting and Zoning Navigation

Navigating the complex world of Medford and Massachusetts ADU regulations can be tricky. As an experienced Medford, MA ADU contractor, we handle the entire permitting process for you—ensuring your project complies with state and local codes in Middlesex and Essex counties.

High-Quality Construction

At FiveTen Construction & Design, quality comes first. From the foundation to the final finishes, your ADU will be built with exceptional craftsmanship and attention to detail. Whether it’s a detached structure or a basement ADU conversion, you can count on a home that’s both beautiful and built to last.

Final Walkthrough and Handover

When construction wraps up, we’ll walk you through your brand-new ADU to ensure every detail meets your expectations. Your complete satisfaction is our #1 priority, and we’re not finished until you’re thrilled with the final result.

Ready to build your dream basement ADU in Medford, MA or start a new ADU project? Contact FiveTen Construction & Design—the Medford, MA ADU contractor you can trust.

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