ADU Builder vs. General Contractor: Who Should You Trust with Your Home’s Next Chapter?

5-minute read

Wednesday, July 30, 2025

Thinking about building an ADU to expand your living space, create rental income, or welcome back a returning family member? You’re not alone—accessory dwelling units (ADUs) are one of the hottest trends in modern housing. But one question keeps coming up:
Should you hire a specialized ADU builder or a general contractor?

Let’s break it down, so you can make a smart, confident decision for your home—and your future.

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What Exactly Is an ADU?

Meet the ADU Builder: The Niche Specialist

Why Choose an ADU Builder?

Meet the General Contractor: The All-Around Maestro

Why Choose a General Contractor?

Quick Comparison: ADU Builder vs. General Contractor

So, Who Should You Hire?

Don’t Just Choose—Interview

Final Thoughts: It’s More Than Just Extra Space

Ready to Build Your Dream ADU?

What Exactly Is an ADU?

ADUs, or accessory dwelling units, are compact living spaces located on the same lot as a primary residence. They go by many names: granny flats, backyard cottages, garage conversions, or even basement suites. What they all have in common is their ability to add functional, independent living space—and value—to your property.

Whether you’re dreaming of a guesthouse, home office, or rental unit, an ADU can be a game-changer. But to bring your vision to life, you need the right expert by your side.

Meet the ADU Builder: The Niche Specialist

Think of an ADU builder like a tailor who only makes custom suits. They focus exclusively on ADUs and know the ins and outs of design, local permitting, and efficient construction.

Why Choose an ADU Builder?

Laser-sharp expertise in local ADU codes, zoning laws, and design standards
Turnkey service—from design to permits to final inspection
Creative, space-saving designs tailored to small spaces
Faster timelines thanks to deep familiarity with city planning processes
Minimal stress for you as the homeowner

If you want someone who lives and breathes ADUs, this is your go-to.

Meet the General Contractor: The All-Around Maestro

On the other hand, general contractors are versatile pros who handle a wide range of construction projects. From full-home remodels to decks and ADUs, they coordinate the moving parts to make it all happen.

Why Choose a General Contractor?

Broad skillset across all types of home construction
Experienced project managers who handle subcontractors like plumbers, electricians, and framers
Flexible enough for multi-phase projects involving more than just an ADU
Often more budget-friendly upfront, especially if you’re hands-on and detail-oriented

General contractors shine when your project involves multiple elements beyond just an ADU.

Quick Comparison: ADU Builder vs. General Contractor

Feature	ADU Builder	General Contractor
Specialization	ADUs only – deep expertise	All construction types
Project Scope	Focused on ADU start to finish	Can manage large/multi-part projects
Regulatory Knowledge	Up-to-date with ADU codes	May need to research ADU rules
Design Skills	Space-saving, compact layouts	May outsource for ADU design
Timeline & Surprises	Predictable with fewer delays	Can hit snags on ADU-specific work
Best For	Seamless ADU builds	Projects with varied scope

So, Who Should You Hire?

Ask yourself a few key questions:

Is your project limited to an ADU or part of a bigger home upgrade?
Do you want a full-service experience—or to stay more involved in the process?
Do you need your ADU done quickly, or are you flexible with time and potential hiccups?

If your main goal is to build an efficient, code-compliant ADU with as little hassle as possible, an ADU builder is the clear winner.

If you’re juggling multiple projects—say, a pool, a patio, and an ADU all at once—a general contractor might offer better coordination.

Don’t Just Choose—Interview

Before signing a contract, talk to both an ADU builder and a general contractor. Ask questions like:

Can I see your recent ADU work?
How do you handle permits and planning approvals?
What’s your estimated timeline and budget flexibility?
Do you have experience with small-space design and city code compliance?

Portfolios, references, and planning processes will help you decide who’s the right fit for your project.

Final Thoughts: It’s More Than Just Extra Space

Your ADU isn’t just another structure—it’s a new chapter of your home’s story. With the right professional by your side, you’ll gain more than square footage. You’ll gain flexibility, value, and long-term peace of mind.

Ready to Build Your Dream ADU?

Whether you’re leaning toward an ADU builder or a general contractor, the first step is getting expert input tailored to your goals. At Buy a Small House, we specialize in custom ADU solutions that balance smart design, regulatory know-how, and quality craftsmanship.

From concept to completion, we handle it all—so you can focus on what matters most: creating space that works for your life, your family, and your future.

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