ADU Construction
In Cape Cod, MA
Flexible living space for family, guests, or future rental potential.
Accessory Dwelling Units are the smartest investment a Cape Cod homeowner can make right now. Rental income, family space, or long-term property value — Ocazo builds them complete, from permits to final paint.
A second home on
your own property.
An Accessory Dwelling Unit (ADU) is a fully independent living space on the same property as your primary home. It can be attached to the house, built above a garage, or constructed as a separate structure on your lot. It has its own entrance, kitchen, bathroom, and everything a tenant or family member needs to live comfortably.
On Cape Cod, ADUs make exceptional sense. The rental market is strong, especially for year-round housing. Property values are high. And many Cape Cod lots — even modest ones — have the space and configuration to support an ADU without sacrificing your backyard or privacy.
Ocazo Construction builds ADUs complete — from lot assessment and permitting through framing, plumbing, electrical, HVAC, tile, cabinetry, and final paint. Every trade in-house. One contractor, zero coordination headaches.
Which ADU is right
for your property?
Every lot is different. The right ADU depends on your property size, existing structures, zoning, and goals. Here are the most common types we build on Cape Cod.
A completely separate structure built on your lot — the most popular ADU on Cape Cod. Maximum privacy for both you and the tenant. Can be one or two stories with garage below and living space above.
- Full independence from main house
- Garage below option — additional value
- Matched to existing home's exterior style
- Full kitchen, bath, and living area
A self-contained unit added to your existing home — side addition, converted garage, or expanded wing. Cost-effective because it shares walls and can share utilities. Ideal for family members or long-term renters.
- Connected to main house — easier utility sharing
- Private entrance and all separate amenities
- Ideal for aging parents or adult children
- Lower cost than detached unit
Convert an existing attached or detached garage into a livable studio or one-bedroom ADU. The most budget-friendly path — the structure is already there. We add insulation, HVAC, plumbing, electrical, and full finishes.
- Existing structure reduces cost significantly
- Faster build — typically 3–5 months
- Ideal for studio or 1-bedroom layout
- Full code compliance and separate entry
Three reasons Cape Cod
homeowners are building ADUs now.
The combination of Massachusetts law changes, Cape Cod's rental market, and rising property values makes right now the ideal moment to add an ADU to your property.
Cape Cod year-round rental demand is strong. A well-built ADU can generate $1,500–$3,000/month — offsetting your mortgage, building equity, and creating long-term financial security.
A legal, permitted ADU adds $150,000–$300,000+ to your Cape Cod property's appraised value. It's one of the highest-ROI investments you can make in the current market.
An in-law suite keeps aging parents close while giving everyone privacy. Or house your adult children while they save for their own home. Flexibility that changes as your life does.
Cape Cod has a well-documented year-round housing shortage. A compliant, permitted ADU addresses real community need — and makes your property more attractive to future buyers who see rental potential.
Cape Cod year-round rental demand significantly outpaces supply. A well-built ADU rarely sits vacant.
What the 2024 law means
for Cape Cod homeowners.
Massachusetts passed significant ADU legislation that took effect in 2024 as part of the Affordable Homes Act. The law fundamentally changes what Cape Cod homeowners can build on their property — making now the most favorable regulatory environment for ADU construction in state history.
by-right
towns
effective
cost
Eligibility depends on your lot size, existing structures, setbacks, and your town's specific ADU bylaws under the new state framework. During your free consultation, we assess your specific property and give you a clear, honest answer — before you commit to anything. Most Cape Cod single-family lots now qualify for at least one ADU type.
Every trade.
One contractor.
Building an ADU involves every single trade in construction. Most contractors coordinate multiple subs — meaning more confusion, more delays, and more places for things to fall through the cracks.
Ocazo Construction handles it all in-house. You have one point of contact, one contract, and one accountable person from the day we break ground to the day you hand the keys to your first tenant.
How we build your
ADU from start to finish.
We visit your property, assess your lot, review your town's ADU bylaws under the new MA law, and tell you exactly what type of ADU you can build and what it will cost — before you commit to anything.
Architectural drawings, engineering, and all permit applications submitted to your town. We manage the full approval process — typically 2–3 months on Cape Cod depending on the town.
Foundation, framing, roofing, exterior, plumbing, electrical, HVAC, insulation, interior finishes — all managed by Cristian personally. Typical build time: 3–6 months depending on ADU type and size.
Final inspections, CO from your town, and a complete walkthrough with you before we hand over the keys. Your ADU is legally permitted, fully finished, and ready for occupancy — or your first tenant.
Frequently asked about
ADU construction on Cape Cod.
Under Massachusetts' 2024 ADU law, most single-family lots on Cape Cod now qualify for at least one type of ADU. Eligibility depends on your specific lot size, current setbacks, existing structures, and your town's updated bylaws. We assess your property for free and give you a clear answer before any commitment.
Garage conversion ADUs typically range from $80,000–$150,000. Attached in-law suites run $120,000–$220,000. Detached carriage houses or cottages range from $150,000–$350,000+. Costs depend on size, type, site conditions, and finish level. Your free estimate will be fully itemized with no surprises.
Total project timeline is typically 4–10 months from start of design to certificate of occupancy. Permitting takes 2–3 months depending on your town. Active construction is 3–6 months. We give you a realistic timeline at the assessment stage so you can plan accordingly.
Yes — a properly permitted ADU can be rented as a long-term residential unit. Cape Cod year-round rental demand is strong, with most well-located ADUs achieving full occupancy quickly. Short-term vacation rental regulations vary by town and are subject to different rules. We recommend consulting with a local real estate attorney regarding rental regulations in your specific town.
An ADU is a fully independent living unit with its own kitchen, bathroom, and separate entrance — legally permitted for independent occupancy. A guest house or in-law suite may or may not meet the legal ADU standard depending on how it was permitted. Building to ADU standards protects your investment, allows legal rental, and maximizes your property value at sale.
A permitted ADU will increase your property's assessed value, which typically increases your property tax. However, the rental income and overall property value appreciation almost always more than offset the tax increase. We recommend discussing the financial picture with your accountant or a Cape Cod real estate advisor before building.
Ready to add an ADU to
your Cape Cod property?
The first step is a free property assessment — we visit, review your lot and town regulations, and give you a clear picture of what's possible and what it costs. No obligation.
Tell us about your property — we respond within 1 business day.