16 Best ADU Builders in Texas – 2026

ADU rules in Texas depend heavily on where the property is located. Austin’s HOME amendments can allow up to three housing units on qualifying lots, while Dallas often relies on overlays or Board of Adjustment approval. Fort Worth applies a 1,000-square-foot maximum, and Houston takes a different approach altogether, operating without traditional zoning but still imposing limits through local ordinances and deed restrictions. For homeowners, that means the answer to “Can I build an ADU?” can change significantly from one metro to the next.

For readers who want residential real estate exposure without handling design, permitting, or construction, Ark7 offers fractional interests in professionally managed rental-property series. Shares can begin at $20 for certain offerings, subject to availability and investor eligibility.

To help compare options across the state, this guide covers 16 companies operating in five Texas regions, based on publicly available company information reviewed in 2026. Because pricing, customer ratings, business details, and licensing information can change, confirm current credentials and costs directly with each provider before entering into an agreement.

Key Takeaways

• Austin’s HOME Phase 1 allows up to three housing units on eligible SF-1, SF-2, and SF-3 properties of at least 5,750 square feet, subject to lot size and other development standards.
• Under Dallas’s ADU Overlay standards, the maximum floor area is generally the greater of 700 square feet or 25% of the main structure.
• Houston does not use conventional zoning, but ADUs remain subject to City development ordinances, building and permitting requirements, floodplain rules, and applicable deed restrictions.
• Houston amended Chapter 42 to increase the permitted maximum size of a second dwelling unit from 900 to 1,500 square feet, subject to applicable standards.
• Freddie Mac found that first-time ADU listings grew at an average annual rate of 8.6% between 2009 and 2019 nationally, while ADUs’ share of total active listings rose from 3.5% to 6.6%.
• Permit review times vary by property, project scope, completeness, and required technical reviews, and Texas cities rarely publish service guarantees.
• Ark7 offers shares in rental-property series starting at $20 per share, subject to offering availability and eligibility.

How This List Was Compiled

This list was assembled from publicly available company information rather than a scoring model, and no ranking is implied by the order below. Companies were compared on regional coverage, ADU specialization, published pricing, and licensing where available. Company-published pricing, project counts, ratings, and experience figures are labeled as such throughout, and several entries carry limited public information. Verify licensing and confirm current pricing directly with each firm before contracting.

Texas ADU Rules to Understand First

• Austin: HOME Phase 1 allows up to three housing units on eligible SF-1, SF-2, and SF-3 properties of at least 5,750 square feet. It eliminated the former primary versus secondary use distinction for these developments. HOME Phase 2 created a separate small-lot single-family category allowing only one dwelling unit. No owner-occupancy requirement applies.
• Dallas: In many single-family districts, an ADU may require an applicable ADU Overlay or Board of Adjustment approval. Requirements are property-specific, since planned developments and conservation districts can alter the rules. Owner-occupancy is required in the relevant framework, and non-owner-occupied rentals may require Single Family Rental Registration.
• Fort Worth: Maximum detached size of 1,000 square feet, no owner-occupancy requirement per §5.301, must match the architectural style of the main house, and cannot exceed the primary residence height.
• Houston: No conventional zoning, but development ordinances, building and permitting requirements, floodplain rules, and deed restrictions all apply. Houston directs property owners to verify whether deed restrictions permit both construction and rental of an ADU.
• Statewide: Review times vary by project. Treat any published permit timeline as a vendor estimate rather than a municipal commitment.

16 ADU Companies Operating in Texas for 2026

1. Small House Solutions (Austin, Multi-Metro Reach)

Address: 4005 W Parmer Ln, Austin, TX 78727

Phone: (512) 696-7684

Type: Design-Build

Pricing: Company-published $150,000 to $350,000

Service Area: Austin, with project capability extending to San Antonio and Houston metros

Small House Solutions offers full design-build services for custom ADUs ranging from 320 to 1,200 square feet, handling concept through permitting and construction.

What Sets Small House Solutions Apart:

• 3D visualization during the design phase
• Full permitting support
• Garage conversions and detached units
• Remote consultations and on-site coordination for Houston-area projects, with no physical Houston office
• Climate-appropriate design for heat, humidity, and flood mitigation

2. Austin Tiny Homes (Stick-Built Focus)

Type: Stick-Built Design-Build

Price Range: Company-published $150,000 to $300,000

Unit Sizes: 400 to 1,100 square feet

Austin Tiny Homes specializes in stick-built construction rather than prefab, and advertises experience with two-unit and three-unit residential projects under Austin’s HOME regulations.

What Sets It Apart:

• White-glove service model
• Austin Energy Green Building standards compliance
• Design customization with finish selection

3. NuHorizon Remodeling (Austin Additions and ADUs)

Address: 9442 North Capital of Texas Highway, Austin, TX 78759

Type: Remodeling and ADU Contractor

An established Austin contractor currently advertising ADU and garage-conversion services, with experience in Austin’s updated residential zoning framework.

What Sets It Apart:

• Home additions alongside ADU construction
• Flexible pricing options
• Permit management support

4. Teamwork Home Designs (Design-Forward)

Address: 8101 Cameron Rd, Austin, TX 78754. The company’s own pages show both Suite 107 and Suite 210, so confirm the current suite directly.

Type: Design-Build

Rating: 5.0/5 across 15 Houzz reviews as of August 2026

Located in North Austin, Teamwork emphasizes design-forward ADU projects.

What Sets It Apart:

• Certified design services
• Residential additions alongside ADU work
• North Austin concentration

5. Estate ADU (Dallas Turnkey)

Address: 4849 Greenville Ave, Suite 100, Dallas, TX 75206

Phone: (214) 949-5192

Type: Turnkey Design-Build

Service Area: Dallas, Grapevine, Highland Park

Estate ADU specializes in detached ADUs, garage conversions, and mother-in-law suites with turnkey construction. Published client testimonials are favorable.

What Sets It Apart:

• Full kitchen, bathroom, and laundry installations
• Permitting and city approval management
• Project communication and scheduling focus

6. Dallas ADU Builder / DFW ADU Builder (Soil and Site Expertise)

Phone: (817) 372-0211

Type: Detached ADU Specialist

Price Range: Company-published $125,000 to $350,000+

Hours: Mon to Fri 7:00 AM to 6:00 PM, Sat 8:00 AM to 2:00 PM

The company advertises expertise in DFW-specific challenges including expansive clay soils and utility requirements.

What Sets It Apart:

• Site assessment and feasibility studies before construction
• Focus on detached new construction
• Extended weekday and Saturday availability

7. Dallas Custom ADU Builders (Overlay Familiarity)

Address: 4211 Cedar Springs Rd, Dallas, TX 75219

Phone: (469) 557-4413

Type: Custom Design-Build

Located in Uptown Dallas, this builder advertises custom ADU design with familiarity in Dallas’s ADU Overlay district requirements.

What Sets It Apart:

• Overlay district experience
• Budget-conscious options that maintain zoning compliance
• Custom design orientation

8. Blackline Renovations (Higher-End Dallas Market)

Address: 4849 Greenville Ave, Suite 1330, Dallas, TX 75206

Phone: (214) 827-3747

Type: Design-Build, established 2002

Hours: Mon to Fri 9 AM to 5 PM

A design-build firm serving Highland Park, University Park, and the M-Streets, positioned for higher-end projects.

What Sets It Apart:

• Established 2002 with a two-decade operating history
• Concentration in affluent Dallas neighborhoods
• Confirm any professional certifications and green building credentials directly with the company

9. Forge Legacy (Dallas-Fort Worth Coverage)

Type: ADU and Guest House Construction

Price Range: Company-advertised $80,000 to $250,000

Service Area: Dallas and Fort Worth metros

Forge Legacy currently advertises ADU and guest-house construction, with completed projects including Highland Park.

What Sets It Apart:

• Coverage across both DFW metros
• Published project range spanning modest to substantial budgets
• Client testimonials emphasizing craftsmanship and detail

10. PRO Construction (Fort Worth Zoning Focus)

Address: Keller, TX 76262

Phone: (817) 372-0211

Type: Backyard Cottage Specialist

The company advertises more than 25 years of Tarrant County experience and specializes in Fort Worth ADU zoning requirements.

What Sets It Apart:

• Focus on backyard cottages up to Fort Worth’s 1,000 square foot detached ceiling
• Tarrant County concentration
• Structural integrity and code compliance emphasis

11. HTX Tiny Homes (Greater Houston)

Service Area: Greater Houston and Southeast Texas

Type: Custom Tiny Homes and Turnkey ADUs

HTX Tiny Homes serves homeowners and investors with attention to Houston’s neighborhood-specific deed restrictions.

What Sets It Apart:

• Deed restriction navigation across Houston neighborhoods
• Custom tiny homes alongside turnkey ADUs
• Southeast Texas coverage beyond the city

12. Tell Projects (Flood and Storm Resilience)

Type: Houston ADU Contractor

Cost Range: Tell Projects states $120,000 to $450,000 depending on size, from 400 to 1,200 square feet, and flood zone requirements

Timeline: Tell Projects states 6 to 12 months including permits

Tell Projects markets Houston ADU work with specific attention to flood mitigation and hurricane-resistant construction.

What Sets It Apart:

• Flood mitigation design for Houston conditions
• Energy-efficient HVAC designed for Gulf Coast humidity
• Garage conversions alongside new construction

13. Carson Custom Homes LLC (Hill Country Casitas)

Address: 6335 Camp Bullis Road, San Antonio, TX 78257

Type: Custom Home Builder

Carson Custom Homes says it has operated since 1999, building casitas and in-law suites.

What Sets It Apart:

• Focus on outdoor living integration suited to Hill Country properties
• Long San Antonio operating history
• Casita-style architectural approach

14. David Barr Builder / Hill Country Casitas (Specialized Branch)

Address: 7160 U.S. 281, Spring Branch, TX 78070

Type: Custom Builder with Casita Branch

David Barr Builder says it has built homes in San Antonio and South Central Texas since 1982, with Hill Country Casitas operating as a branch specializing in smaller homes and casitas.

What Sets It Apart:

• Dedicated casita and small-home branch
• Four decades of South Central Texas experience
• Hill Country architectural familiarity

15. TrueLux Fine Homes (Custom Home and Remodeling)

Address: 110 Berry Creek Circle, Briggs, TX 78608

Type: Custom Home and Remodeling Firm

A firm listed by the Texas Association of Builders, serving Austin and the Hill Country.

What Sets It Apart:

• Texas Association of Builders membership
• Austin and Hill Country coverage
• Confirm ADU-specific project experience directly if that is your priority

16. Kanga Room Systems (Statewide Prefab)

Address: 3501 S Jack Kultgen Expy, Waco, TX 76710

Phone: (512) 777-1383

Type: Prefab Manufacturer

Hours: Mon to Fri 10 AM to 4 PM

Kanga offers DIY kits shipped nationwide and turnkey installation for Texas customers. This is the only prefab manufacturer in this directory.

What Sets It Apart:

• Waco showroom displaying Modern and Cottage design styles
• Both DIY kit and turnkey installation options
• Statewide Texas service from a central location

How to Choose the Right ADU Builder

• By metro rulebook: Austin projects benefit from HOME-framework familiarity, Dallas projects from overlay and Board of Adjustment experience, Fort Worth from §5.301 knowledge, and Houston from deed restriction navigation.
• By site conditions: DFW’s expansive clay soils and Houston’s floodplain requirements each call for builders who address them explicitly rather than generically.
• By delivery model: Prefab kits suit rural or access-constrained sites, turnkey design-build suits owners wanting one contract, and casita specialists suit Hill Country architectural expectations.
• By coverage: Austin is served by Small House Solutions, Austin Tiny Homes, NuHorizon, and Teamwork; DFW by Estate ADU, DFW ADU Builder, Dallas Custom, Blackline, Forge Legacy, and PRO; Houston by HTX and Tell Projects; San Antonio and the Hill Country by Carson, David Barr, and TrueLux; and statewide by Kanga.

Questions to Ask Any Texas ADU Builder

• Which metro’s rules apply to my parcel, and have you completed projects under them?
• In Austin, does my lot meet the 5,750 square foot threshold for the three-unit pathway?
• In Dallas, does my property require an ADU Overlay or Board of Adjustment approval?
• In Houston, have you reviewed my deed restrictions for both construction and rental permissions?
• What is your recent permit experience in my specific city?
• Do you handle utility connections, and what warranties do you offer?

Financing an ADU in Texas

• Home Equity Line of Credit: Variable-rate borrowing against home equity, with interest paid on the amount drawn.
• Cash-out refinance: A new mortgage with a cash portion for construction at a fixed rate over a long term.
• Construction loan: Short-term financing that converts to a mortgage at completion.
• Renovation-financing platforms: Financing sources include banks such as Frost Bank and platforms such as RenoFi, which is not itself a lender. RenoFi is a financial technology company that connects borrowers with partner lenders offering renovation financing that can consider a property’s after-renovation value.
• Budget components to price from your own bids: Permit fees, which builder estimates commonly cite at $2,000 to $12,000 depending on city; utility connections; design and architect fees; site preparation and foundation, which vary significantly with soil conditions; and impact fees where applicable.

Comparing ADUs and Fractional Real Estate

Building an ADU may increase a property’s income potential and value, though the effect varies by location, unit quality, rental potential, and buyer demand. It also requires substantial capital, months of project management, and ongoing landlord responsibilities.

ADU considerations:

• Achievable rents vary significantly by neighborhood, unit size, condition, and lease type. Build any projection from current comparable listings rather than a regional range.
• A permitted ADU may increase a property’s appraised or market value, but there is no universally applicable appreciation percentage.
• Regional cost estimates in this guide are illustrative builder-reported ranges rather than a market survey, so price each component from your own bids.
• Garage conversions can cost less than detached new construction when the existing structure is suitable, but structural, foundation, plumbing, fire-separation, or utility work can materially change the total.
• Keep gross rent separate from net income by subtracting vacancy, maintenance, insurance, taxes, management, and financing.

How fractional investing compares:

For those who prefer fractional real estate exposure rather than developing and managing an ADU directly, Ark7 is another model to consider:

• Entry point as low as $20 per share, subject to offering availability and eligibility
• Cash distributions when available, subject to property performance, expenses, reserves, and offering terms
• Professional property selection and management
• Exposure across multiple markets rather than a single Texas property
• No construction timelines or permitting to manage
• Potential access to secondary trading, subject to holding periods, legal and state restrictions, platform availability, and market liquidity. Liquidity is not guaranteed.
• Ark7 IRA options support Traditional and Roth accounts, subject to IRA rules, custodian fees, and individual circumstances

These are speculative securities involving substantial risk, including illiquidity, lack of diversification, and complete loss of capital.

Conclusion

Texas rewards homeowners who research their own metro rather than the state. The rules changed recently enough in Austin and Houston that guidance circulating online is frequently out of date, and Dallas eligibility is property-specific in a way that no general summary can resolve. Confirming what your parcel allows, in writing, is the necessary first step before design or budgeting.

Why Texas Stands Out for ADU Projects

• Austin’s HOME framework: Up to three housing units on eligible SF-1, SF-2, and SF-3 properties meeting the lot-size threshold.
• Houston’s Chapter 42 change: Permitted maximum size for a second dwelling unit increased from 900 to 1,500 square feet, subject to applicable standards.
• Fort Worth’s clarity: A defined 1,000 square foot detached limit with no owner-occupancy requirement.
• Dallas’s overlay pathway: A defined ADU Overlay process alongside Board of Adjustment options.
• Deep builder market: Design-build firms, casita specialists, and a prefab manufacturer all operate statewide.

Investor Tips for Texas ADU Projects

Confirm your parcel’s zoning district and lot size before anything else, since Austin’s three-unit pathway carries a 5,750 square foot threshold and Dallas’s overlay rules are property-specific. In Houston, read the deed restrictions before you read a builder’s brochure, because they can prohibit both construction and rental regardless of what city ordinances allow. Treat every published permit timeline as a vendor estimate rather than a municipal commitment. Price each cost component from your own bids instead of a regional table, and keep gross rent separate from net income.

For those who prefer residential real estate exposure without a construction project, Ark7 offers shares in rental-property series starting at $20, subject to offering availability and eligibility.

Frequently Asked Questions

Which Texas city has the most workable ADU rules?

That depends on your parcel rather than the city. Austin’s HOME Phase 1 allows up to three housing units on eligible SF-1, SF-2, and SF-3 properties of at least 5,750 square feet, which is broad but carries a lot-size threshold. Houston has no conventional zoning and permits second dwelling units up to 1,500 square feet under Chapter 42, but deed restrictions can override that entirely. Fort Worth offers a clear 1,000 square foot limit with no owner-occupancy requirement. Dallas requirements are property-specific. Compare against your actual lot rather than the headline rule.

What permits do I need for an ADU in Texas?

Requirements vary by city, but most Texas municipalities require building, electrical, plumbing, and mechanical permits for new ADU construction. In many Dallas single-family districts, an ADU may require an applicable ADU Overlay or Board of Adjustment approval depending on the property’s zoning. Houston lacks conventional zoning but still requires standard permits and compliance with development ordinances, floodplain rules, and deed restrictions. Builder estimates commonly cite $2,000 to $12,000 in permit fees, though actual costs depend on your municipality.

Can I legally rent out my ADU in Texas?

Often, but not automatically. Rental eligibility depends on local zoning and development rules, permits, deed restrictions, HOA restrictions, and applicable rental regulations, as well as whether the structure was legally permitted for occupancy. Austin does not impose an owner-occupancy requirement. Dallas requires owner-occupancy in the relevant framework, with non-owner-occupied units requiring Single Family Rental Registration. Fort Worth does not require owner-occupancy per §5.301. Houston directs owners to verify whether deed restrictions permit both construction and rental.

Are prefab ADUs a practical option in Texas?

They can be, particularly for rural sites or properties where access limits conventional construction staging. Kanga Room Systems, the only prefab manufacturer in this directory, offers both DIY kits shipped nationwide and turnkey installation for Texas customers, with a Waco showroom. Prefab generally works best for standard layouts on flat lots with straightforward access. Custom-built ADUs provide more flexibility for challenging sites, specific design requirements, or higher-end finishes.

What ongoing costs should I budget for after completion?

Plan for property tax increases as your assessment reflects the added structure, higher homeowner’s insurance premiums, utility costs for the separate unit, a maintenance reserve, and property management fees if you hire professionals. If you financed through a construction loan, factor in the mortgage payment once it converts. Weigh these against realistic rental income built from current comparable listings rather than a general range.

Neither Ark7 nor Ark7 Properties is a broker-dealer or an investment adviser. Dalmore Group LLC, a registered broker-dealer and member FINRA/SIPC, located at 525 Green Place, Woodmere, NY 11598, is the broker-dealer of record for Ark7, an issuer direct offering. Neither Ark7 nor Dalmore makes recommendations or provides advice about investments, and nothing here should be construed as a recommendation for any security. An investment in an offering constitutes an investment in a particular series and not in Ark7 or any of the underlying assets. Investments on the Ark7 platform are speculative and involve substantial risks, including illiquidity, lack of diversification, and complete loss of capital. Cash distributions are not guaranteed and are subject to property performance, expenses, reserves, and offering terms. Past performance is no guarantee of future results. This article is for informational purposes only.