Best ADU Builders in Miami, Houston, and Dallas: 2026 Guide

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Quick Answer: The best ADU builders in Miami, Houston, and Dallas combine local permitting expertise with transparent pricing. In Miami, look for builders experienced with Florida's Live Local Act and hurricane-rated construction. In Houston, prioritize contractors who handle HOA navigation and foundation engineering for expansive clay soils. In Dallas, choose builders versed in recent Texas SB 1412 zoning reforms. Expect to pay $150–$350 per square foot depending on city, finish level, and whether you build detached, attached, or convert an existing structure. Start with 3–5 quotes and verify each contractor's license, insurance, and ADU-specific portfolio before signing anything.

Why Miami, Houston, and Dallas Are ADU Hotspots in 2026

Three years ago, building an ADU in any of these Sun Belt metros was either legally impossible or bureaucratically painful. That's changed fast.

Florida passed the Live Local Act in 2023, then expanded it in 2024, effectively preempting local single-family zoning restrictions on accessory dwelling units statewide. Miami-Dade County followed with streamlined permitting that cut average approval timelines from 14 weeks to under 6. The result: ADU permit applications in Miami jumped 340% between 2023 and 2025, according to Miami-Dade County building department data.

Texas took a different path. Senate Bill 1412, signed in 2025, prevents cities over 500,000 from banning ADUs on single-family lots. Houston — already famously un-zoned — saw this as validation of its existing flexibility, while Dallas had to rewrite parts of its development code. Both cities now rank among the top 10 U.S. metros for ADU construction activity, per the National Association of Home Builders' 2026 housing trends report.

The demand side is obvious. Miami's median home price crossed $620,000 in early 2026. Houston sits at $345,000 — affordable by coastal standards but still stretching local incomes. Dallas hovers around $410,000. In all three markets, homeowners are building ADUs to generate rental income ($1,400–$2,800/month depending on size and location), house aging parents, or create home offices that actually feel separate from the main house.

But here's what most guides won't tell you: the builder you choose matters more than the floor plan you pick. A contractor who doesn't understand local soil conditions, wind load requirements, or utility connection rules will cost you months and tens of thousands of dollars in change orders. This guide breaks down the best ADU builders in each city, what to look for, what to avoid, and how much you should actually budget.

For a broader look at national pricing trends, check out our ADU Construction Costs by State breakdown.

Best ADU Builders in Miami (2026)

Miami's ADU market has matured quickly. The builders who've risen to the top share a few traits: they understand South Florida's strict wind mitigation requirements (Miami-Dade NOA product approvals are non-negotiable), they handle permitting in-house, and they've completed enough projects to show you finished ADUs — not just renderings.

Artesa Build & Design

Artesa specializes in new construction ADUs and garage conversions across Miami and Fort Lauderdale. They've carved out a niche in the garage-to-ADU conversion market, which makes sense — when lot sizes are tight (and in Miami, they often are), converting an existing structure saves $30,000–$60,000 compared to building from scratch. Artesa handles design, engineering, permitting, and construction under one roof. Their projects typically run 400–800 square feet, and they've built a reputation for clean, modern finishes that photograph well for Airbnb listings.

Best for: Garage conversions, smaller lots, homeowners who want design-build simplicity.

Price range: $180–$280/sq ft depending on scope and finishes.

Palms Remodeling Inc.

Palms Remodeling covers Miami-Dade, Broward, and Palm Beach counties with a full-service ADU offering. They're one of the few Miami contractors who will take on both attached and detached ADUs, plus internal conversions. Their team includes in-house permit expeditors — a real advantage in Miami-Dade, where the building department's online portal still has a learning curve that trips up less experienced contractors. Reviews consistently highlight their communication during construction, which matters when you're living on-site during a 4–6 month build.

Best for: Full-service builds across South Florida, homeowners who want one point of contact from design through occupancy.

Price range: $200–$320/sq ft for detached units; conversions start lower.

Goshen Tiny Homes

Goshen approaches ADUs from the tiny home and modular side. They serve Central and South Florida — Miami, Fort Lauderdale, West Palm Beach, Boca Raton, and surrounding areas. Their prefab approach can shave 30–45 days off construction timelines compared to traditional stick-built ADUs. If you're on a tighter budget or want something move-in ready faster, Goshen is worth a conversation. The trade-off: less customization than a ground-up build.

Best for: Budget-conscious builds, speed to completion, modular/prefab preference.

Price range: $130–$220/sq ft depending on model and site prep requirements.

What to Watch for in Miami

Miami ADU builds come with unique challenges. Every ADU needs to meet Florida Building Code wind speed requirements — in Miami-Dade, that means rated for 175+ mph winds. Impact windows and doors are mandatory, adding $8,000–$15,000 to material costs compared to inland builds. Flood zone designations affect foundation requirements and insurance costs. And if your property sits in a historic district or has covenant restrictions, you'll need additional approvals that can add 4–8 weeks to timelines.

Always confirm your builder carries the right insurance: general liability of at least $1M, workers' comp, and a current State of Florida contractor license (CBC or CRC prefix). Miami-Dade requires separate local registration on top of the state license.

Want to understand the full cost picture? Our guide on How Much Does ADU Cost breaks it down by unit type and region.

Best ADU Builders in Houston (2026)

Houston's lack of traditional zoning makes it uniquely friendly to ADU construction. No rezoning hearings, no conditional use permits — if your lot meets minimum size requirements and setbacks, you can build. But Houston has its own complications: HOA restrictions (which affect roughly 40% of Houston-area homes), expansive clay soils that demand engineered foundations, and a permitting process that, while straightforward, still requires detailed engineering plans.

Houston Construction Pros

This team has built a focused practice around ADUs and backyard homes across the Houston metro. They handle the full scope: design, permitting, HOA coordination, and construction. Their standout quality is lot-specific planning — they evaluate your property's drainage patterns, utility access points, and soil conditions before proposing a design, which prevents the expensive mid-build surprises that plague less thorough contractors. They're particularly experienced with detached ADUs in the 500–1,000 square foot range.

Best for: Detached backyard ADUs, homeowners in HOA communities who need a builder experienced in navigating deed restrictions.

Price range: $150–$250/sq ft.

Home Remodeling Experts (Houston)

This firm builds what they call "smart backyard homes" and garage apartments across the Houston metro. They've completed projects in the Heights, Montrose, Midtown, and the suburbs — a useful range of experience since ADU requirements and neighborhood expectations vary significantly across Houston. Their portfolio leans toward the higher-end side, with finished ADUs that include full kitchens, separate HVAC systems, and covered entry porches.

Best for: Higher-end garage apartments and backyard cottages, inner-loop neighborhoods where design matters for resale value.

Price range: $175–$300/sq ft for finished, move-in-ready units.

Housemill Design

While not exclusively an ADU contractor, Housemill Design has completed dozens of ADU projects in Houston and brings architectural design capability that many general contractors lack. They can design and build ADUs that match your existing home's style — important in Houston's historic neighborhoods where a mismatched backyard unit can trigger neighbor complaints and potential deed restriction challenges.

Best for: Architecturally sensitive projects, properties in historic or design-conscious neighborhoods.

Price range: $200–$320/sq ft including design fees.

Houston-Specific Considerations

Houston's clay soils are the biggest technical factor in ADU construction here. A standard slab-on-grade foundation won't cut it — most ADUs need post-tensioned slabs or pier-and-beam foundations, adding $8,000–$20,000 to foundation costs compared to areas with stable soils. Your builder should order a geotechnical soil report before finalizing foundation design. If they don't mention this, find a different builder.

HOA navigation is the second major factor. About 40% of Houston homes fall under an HOA or deed restriction community. Some HOAs explicitly ban detached structures over a certain size, others require architectural review board approval, and some have no relevant restrictions at all. A builder experienced in Houston HOA dynamics can read your deed restrictions and tell you exactly what's possible before you spend money on design.

Utility connections in Houston require separate permits. Water, sewer, and electrical connections each go through their own review process. Budget 4–8 weeks for utility permits alone, and make sure your builder is pulling these in parallel with building permits, not sequentially.

Best ADU Builders in Dallas (2026)

Dallas is the newest of these three markets when it comes to ADU-friendly policy. Texas SB 1412 forced the city to update its development code in late 2025, and the local building department is still working through implementation details. That means the builder you choose in Dallas needs to be especially current on regulations — what was true six months ago may not apply today.

Maxable Space (Dallas Market)

Maxable operates as a tech-enabled ADU platform that connects homeowners with vetted local builders. They've expanded aggressively into Texas markets, including Dallas and Fort Worth. The platform handles feasibility analysis, design selection, contractor matching, and project management. For homeowners who want a guided process without directly managing a general contractor, Maxable offers a structured approach. Their builder network in Dallas is still growing, so availability can vary by neighborhood.

Best for: First-time ADU builders who want a managed process, homeowners who prefer a tech-forward approach with transparency tools.

Price range: $200–$350/sq ft (varies by builder in their network).

Nies Homes (Dallas–Fort Worth)

Nies Homes is a Dallas-based custom home builder that's pivoted into the ADU market as demand has grown. Their background in custom residential construction gives them an edge on quality and architectural integration — they design ADUs that look like intentional extensions of the main property, not afterthoughts. They handle projects across Dallas, Plano, Richardson, and surrounding suburbs.

Best for: Custom-designed ADUs, homeowners who prioritize design quality and craftsmanship over minimum cost.

Price range: $220–$350/sq ft.

Texas ADU Builders

This firm focuses exclusively on accessory dwelling units across the DFW metroplex. As a specialist, they've built deep expertise in Dallas's evolving permitting landscape. They offer both stick-built and modular ADU options, with modular builds running 25–35% faster than traditional construction. Their all-in pricing model — one number that covers design, permits, foundation, construction, and utility connections — appeals to homeowners who want budget certainty.

Best for: ADU specialists with all-in pricing, homeowners comparing stick-built vs. modular approaches.

Price range: $160–$270/sq ft for modular; $200–$310/sq ft for stick-built.

Dallas-Specific Considerations

Dallas sits in Tornado Alley, and while ADUs don't require the same hurricane ratings as Miami, wind resistance still matters. The International Residential Code (IRC) wind speed map puts Dallas in a 90–100 mph zone, which affects roof connections, wall bracing, and window specifications. Make sure your builder is engineering for these loads, not just meeting minimum code.

The city's new ADU ordinance (post-SB 1412) sets maximum ADU size at 1,200 square feet or 30% of the main home's living area, whichever is less. Setback requirements are 5 feet from side and rear property lines for one-story ADUs, 10 feet for two-story. Height is capped at the main home's height or 30 feet, whichever is less. Your builder should know these numbers cold.

Dallas also has separate requirements for ADUs with kitchens (which count as "dwelling units" and trigger additional plumbing and electrical inspections) versus ADUs without kitchens (which may be classified as "accessory buildings" with simpler approval paths). If you're building for rental income, you need the full dwelling unit classification — make sure your builder is permitting accordingly.

How to Evaluate ADU Builders: A Practical Framework

Choosing from a list of recommended builders is just the starting point. Here's how to evaluate any ADU contractor in these three markets — or anywhere else.

License and Insurance Verification

This is non-negotiable. Every state handles contractor licensing differently:

Florida (Miami): Requires a state-level Certified Building Contractor (CBC) or Certified Residential Contractor (CRC) license, plus local registration in the county where they're building. Verify at myfloridalicense.com.
Texas (Houston and Dallas): Texas doesn't have a statewide general contractor license, but most cities require registration. Houston requires a City of Houston contractor registration. Dallas requires a general contractor license through the city's building inspection division.
All markets: Verify general liability insurance ($1M minimum), workers' compensation coverage, and auto insurance. Ask for certificates of insurance naming you as additional insured during construction.

Portfolio and References

Ask to see 3–5 completed ADU projects, not renderings or in-progress builds. Visit at least one in person if possible. Talk to previous clients about:

Did the project finish on budget? If not, what drove the overages?
How was communication during construction?
Were there any permitting delays? How did the builder handle them?
Would you hire them again?

A builder who can't produce ADU-specific references is a builder who's learning on your dime.

Contract Structure

Watch for these red flags in ADU construction contracts:

Vague allowances: "Flooring allowance: $3,000" means nothing without specifying square footage and material grade. Get specific product selections locked into the contract.
Missing scope items: Utility connections, landscaping repair, driveway/pathway to the ADU, and final cleaning should all be explicitly included or excluded.
Front-loaded payment schedules: No more than 10% down. Payments should be tied to completed milestones (foundation, framing, rough-in, finishes, final inspection).
No penalty for delays: A good contract includes a timeline with consequences for builder-caused delays.

Permits and Engineering

Your builder — not you — should pull all permits. This includes:

Building permit (the main one)
Electrical permit
Plumbing permit
Mechanical (HVAC) permit
Utility connection permits (water, sewer, electrical service)
Any HOA or architectural review approvals

If a builder suggests you pull permits yourself to "save money," walk away. That's a sign they either lack proper licensing or are trying to avoid accountability.

For a comparison of ADU options versus other small dwelling types, see our ADU vs Tiny Home guide.

ADU Costs in Miami, Houston, and Dallas: 2026 Numbers

Cost is the question everyone asks first. Here's what real ADU projects are costing in each market right now, based on completed 2025–2026 builds.

Miami ADU Costs

ADU Type	Size Range	Cost per Sq Ft	Total Cost Range
Garage conversion	400–600 sq ft	$120–$180	$48,000–$108,000
Attached ADU	500–800 sq ft	$180–$280	$90,000–$224,000
Detached ADU	600–1,000 sq ft	$220–$350	$132,000–$350,000
Prefab/Modular	400–800 sq ft	$130–$220	$52,000–$176,000

Miami costs run 15–25% higher than national averages due to hurricane-rated construction requirements, impact-rated windows and doors, and higher labor costs driven by South Florida's construction boom.

Houston ADU Costs

ADU Type	Size Range	Cost per Sq Ft	Total Cost Range
Garage conversion	400–600 sq ft	$100–$150	$40,000–$90,000
Attached ADU	500–800 sq ft	$150–$230	$75,000–$184,000
Detached ADU	600–1,000 sq ft	$175–$280	$105,000–$280,000
Garage apartment (2-story)	600–900 sq ft	$190–$300	$114,000–$270,000

Houston benefits from lower labor costs and no state income tax (which attracts construction workers). The main cost driver is foundation engineering — pier-and-beam or post-tensioned slab foundations add $12,000–$25,000 compared to simple slabs.

Dallas ADU Costs

ADU Type	Size Range	Cost per Sq Ft	Total Cost Range
Garage conversion	400–600 sq ft	$110–$160	$44,000–$96,000
Attached ADU	500–800 sq ft	$160–$250	$80,000–$200,000
Detached ADU	600–1,000 sq ft	$200–$310	$120,000–$310,000
Prefab/Modular	400–800 sq ft	$140–$230	$56,000–$184,000

Dallas sits between Miami and Houston on cost. The market is still maturing post-SB 1412, so pricing has more variability — builders are still calibrating their ADU-specific pricing as volume grows.

Hidden Costs to Budget For

Beyond the construction contract, plan for:

Permitting fees: $2,000–$8,000 depending on city and ADU size
Impact fees: Miami charges these; Houston and Dallas vary by utility district
Utility connections: $3,000–$12,000 for new water, sewer, and electrical service
Survey and soil report: $800–$2,500
Design and engineering: $3,000–$15,000 if not included in your builder's scope
Landscaping repair: $2,000–$8,000 to restore your yard after construction
Financing costs: Construction loan interest during the build period

For the complete national cost picture, read our How Much Does ADU Cost guide.

Financing Your ADU Build in 2026

Most homeowners don't pay cash for ADU construction. Here are the financing options available in all three markets.

Home Equity Loans and HELOCs

The most common ADU financing method. You borrow against your home's existing equity at rates currently running 7.5–9.5% (as of early 2026). HELOCs offer flexibility — you draw funds as construction milestones hit, paying interest only on what you've used. The downside: your home is collateral.

Best for: Homeowners with 30%+ equity and strong credit scores (720+).

Construction Loans

Specifically designed for building projects. The lender releases funds in draws as construction progresses, then converts to a permanent mortgage once the ADU is complete. Rates are typically 0.5–1% higher than standard mortgages. The application process is more involved — you'll need construction plans, builder contracts, and a project timeline.

Best for: Larger ADU projects ($150K+) where you want the loan structure to match the construction process.

Cash-Out Refinance

If mortgage rates drop further in 2026 (several forecasters predict rates in the low 6% range by Q3), refinancing your primary mortgage and pulling cash for ADU construction could make sense. You get one loan, one payment, and potentially a lower blended rate. The math only works if your current mortgage rate is higher than what's available.

Best for: Homeowners with high-rate existing mortgages who want to consolidate.

ADU-Specific Loan Programs

A growing number of lenders now offer loan products designed specifically for ADU construction. These typically factor in the projected rental income from the completed ADU when qualifying you, allowing higher loan amounts than traditional products. Check with local credit unions and community banks — national banks have been slower to adopt these programs.

California pioneered this category, and lenders like Villa Homes have expanded their financing partnerships into other states. While Villa primarily serves the California market, their model of integrating financing with construction is being replicated by builders in Miami, Houston, and Dallas.

ROI Expectations

The investment math varies by city:

Miami: Monthly rental income of $1,800–$2,800 for a 600+ sq ft ADU. Airbnb/short-term rental potential is high but requires compliance with local STR regulations.
Houston: Monthly rental income of $1,200–$2,000. Lower rents but also lower construction costs — payback periods are comparable to Miami.
Dallas: Monthly rental income of $1,400–$2,200. The market is newer, so rental comparables are thinner, but demand for small housing units is strong.

At median construction costs and rental rates, ADU payback periods run 8–14 years in these markets. Property value increases (typically 20–35% of ADU construction cost) improve the equation further.

Permitting and Regulations: City-by-City Breakdown

Understanding the rules before you start saves time, money, and headaches. Here's what's current as of April 2026.

Miami-Dade County ADU Rules

Eligible lots: Most single-family residential lots, subject to minimum lot size requirements
Maximum ADU size: 950 square feet or 50% of the principal structure's living area, whichever is less
Height limit: 25 feet for detached ADUs
Setbacks: 5 feet minimum from side and rear property lines (detached); attached ADUs follow main structure setbacks
Parking: One additional off-street parking space required (may be on the driveway)
Owner occupancy: Owner must occupy either the main home or the ADU
Short-term rental: Allowed in some areas; check specific zoning overlay
Permit timeline: 4–8 weeks for straightforward projects; longer for properties in flood zones or historic districts

The Live Local Act preempts many local restrictions, but implementation details still vary by municipality within Miami-Dade. Coral Gables, Miami Beach, and unincorporated Miami-Dade each have slightly different processes.

Houston ADU Rules

Eligible lots: Most residential lots (Houston has no traditional zoning)
Maximum ADU size: No citywide cap, but lot coverage limits effectively restrict size; most lots support 600–1,200 sq ft ADUs
Height limit: 35 feet or the height of the principal structure
Setbacks: Per Chapter 42 of the Code of Ordinances — typically 5 feet from rear and side lines
Parking: One off-street parking space per bedroom in the ADU
Owner occupancy: Not required by city code, but many HOAs impose this
Short-term rental: Allowed; no citywide STR registration required (though this may change)
Permit timeline: 3–6 weeks for residential building permits

Houston's lack of zoning is an advantage, but deed restrictions and HOA rules fill the regulatory gap. Always check your deed restrictions before assuming you can build.

Dallas ADU Rules (Post-SB 1412)

Eligible lots: Single-family residential lots in most zoning categories
Maximum ADU size: 1,200 square feet or 30% of principal structure living area, whichever is less
Height limit: Principal structure height or 30 feet, whichever is less
Setbacks: 5 feet (one story), 10 feet (two story) from side and rear property lines
Parking: One additional off-street parking space (waived if within 1/4 mile of transit)
Owner occupancy: Required — owner must live on the property
Short-term rental: Subject to Dallas STR ordinance; registration required
Permit timeline: 6–10 weeks (the department is still scaling up ADU review capacity)

Dallas is in a transition period. Some plan reviewers are still learning the new ADU code, which can cause inconsistent feedback during the permit review process. A builder who has already navigated several Dallas ADU permits is worth the premium.

Builders like Thoroughbred Builders, while based in New Mexico, have expanded their consulting services to help Texas homeowners navigate the post-SB 1412 landscape — a sign of how quickly the ADU market is evolving across the Sun Belt.

For a complete overview of the ADU process from start to finish, see our Complete ADU Guide.

How We Ranked

ADU-builder rankings combine:

Verifiable program attributes: state contractor license status, recorded build counts, prefab vs site-built specialization, factory-direct vs distributor model, and starting price tier (turnkey ADU under $200K vs $200K-400K vs $400K+).
Owner-reported outcomes: Google reviews from the past 24 months, r/ADU and r/RealEstate threads, BBB complaints, and state contractor-board records. We pay close attention to change-order pricing patterns and timeline overruns.
Direct verification: phone-call or website intake asking the same five questions (turnkey cost, permit-timeline expectation, financing partner, change-order pricing structure, warranty terms).

What we never accept: paid placement, kickback arrangements with builders, financing-partner kickbacks. Disclosure: we use affiliate links to ADU-planning tools (Cover, Multitaskr) — these never affect builder rankings.

Update cadence: builders re-verified each quarter. Email research@adubuildersfinder.com for corrections.

Frequently Asked Questions

How long does it take to build an ADU in Miami, Houston, or Dallas?

Expect 4–8 months from design start to move-in for a typical 600–800 sq ft detached ADU. That breaks down to roughly 4–10 weeks for design and engineering, 4–10 weeks for permitting, and 12–20 weeks for construction. Garage conversions and modular installs can cut total timelines to 3–5 months. Miami tends to run longer due to stricter inspection requirements. Houston is often the fastest of the three thanks to its streamlined permitting process.

Do I need to live on the property to build an ADU?

It depends on the city. Miami-Dade requires owner occupancy of either the primary home or the ADU. Dallas requires the owner to live on the property. Houston has no citywide owner-occupancy requirement, though your HOA may impose one. These rules affect your ability to rent both the main home and the ADU to separate tenants — in Miami and Dallas, you can only rent one of the two units to non-owners.

Can I use my ADU as a short-term rental (Airbnb)?

Regulations vary significantly. Houston currently has no citywide short-term rental restrictions, making it the most permissive of the three. Miami allows short-term rentals in many areas but has overlay zones with restrictions — check your specific property's zoning designation. Dallas requires STR registration and has specific rules about spacing between permitted short-term rentals. In all three cities, HOA rules may impose additional restrictions beyond what the city allows.

What's the cheapest type of ADU to build?

Garage conversions are consistently the most affordable option across all three markets, typically running 30–45% less than detached new construction. You're reusing an existing foundation, walls, and roof — the savings on structural work are substantial. The trade-off is size (most garages convert to 400–600 sq ft units) and layout flexibility. Prefab and modular ADUs are the next most affordable option, followed by attached ADUs and then detached new construction.

Will an ADU increase my property taxes?

Yes, in all three markets. Adding a permitted ADU increases your property's assessed value, which increases property taxes. In Texas (Houston and Dallas), expect a property tax increase of $2,000–$6,000 per year depending on the ADU's assessed value and your district's tax rate — Texas property tax rates are among the highest in the country at 1.6–2.5%. In Florida (Miami), expect $1,500–$4,000 per year in additional property taxes. The rental income from your ADU should more than offset the tax increase, but it's a cost to factor into your ROI calculations. Florida's homestead exemption does not apply to the ADU portion of your property.