Architecture firms in Houston: 371 offices, when Texas law requires an architect, and how to choose

This report is for developers, business owners, institutions and homeowners hiring an architect in Greater Houston, for architects and drafters weighing local employers, and for anyone selling to architecture firms. It covers the Census count, the Texas rules on when an architect is required, how to check one, and how to prospect the firms.

Houston's architecture firms in the Census count

County Business Patterns (CBP) 2023 counts establishments in NAICS 541310, Architectural Services, in the Houston-Pasadena-The Woodlands, TX Metro Area (CBSA 26420).

The Census Bureau doesn't publish the classes above 250 here; the last row is the total less the published classes.

Harris County and the suburbs

Pay averages are our calculation, shown where a county has more than 100 employees. Fort Bend's employee count carries the Census Bureau's high-noise flag (confidentiality noise moved it by 5% or more), so it isn't reported. Harris County holds all five offices with 100 to 249 employees and, by the same subtraction as above, both larger ones.

Limits. CBP counts establishments with paid staff, not companies: a national firm's Houston office is one establishment, and sole practitioners without employees are left out.

An engineering town

The same CBP release counts 2,002 engineering offices (541330), 906 commercial and institutional builders (236220, which includes design-build firms), 337 interior design offices and 73 landscape architecture offices in the metro. The labor data tells the same story: Houston has 4,130 architectural and civil drafters and 2,360 architects. For a refinery building, a pipeline facility or a tilt-wall warehouse, an engineering firm or design-builder may lead and bring in an architect for the parts that need one. For a school, a clinic, a church or an office building, start with an architecture firm.

When Texas law requires an architect

Texas regulates architects through the Texas Board of Architectural Examiners (TBAE). Section 1051.606 of the Occupations Code exempts people who don't call themselves architects when they design these privately owned buildings:

Alterations are also exempt unless they involve a substantial structural or exitway change. Public buildings follow separate thresholds, set out in TBAE's Architect Required? flowchart. Anyone working under an exemption may not use any form of the word "architect."

Houston adds one more local twist. The city's Planning and Development Department notes that Houston does not have zoning: development is governed by ordinance codes on how property can be subdivided, and those codes don't address land use. Ask a prospective firm how it handles the approvals that do apply to your site.

Checking a Houston architect

1. Search TBAE's Find a Design Pro for the architect and the firm. The lists are updated daily and searchable by name, city or registration number.
2. Confirm the business registration. Texas requires businesses that offer architecture, registered interior design or landscape architecture to register with TBAE every year.
3. Ask for comparable buildings of the same type and size, and who from that team will work on yours.
4. Agree scope before fee, on a standard form such as AIA's B101-2017 or, where a contractor is hired early as construction manager at risk, B133-2019.

TBAE's active roster, downloaded on 30 October 2026, lists 14,702 architects registered in Texas, 951 of them giving Houston as their city. A third of entries don't publish a city under the state's confidentiality rules, so treat 951 as a floor.

AIA Houston and the job market

AIA Houston, based at Architecture Center Houston, runs Find a Firm, a job search and an affiliate membership for suppliers. The Bureau of Labor Statistics' May 2025 estimates for the metro:

Drafters are 1.88 times as concentrated in Houston's workforce as nationally, against 1.04 for architects. SEC records show no listed architecture company based in the metro.

Selling to Houston architecture firms

Most Houston offices are small: 331 have fewer than 20 employees, where a principal buys. The 33 with 20 to 99 employees have a studio or operations lead who evaluates, and the seven with 100 or more, all in Harris County, have procurement and IT security reviews. Because so much local work is engineering-led, the best-placed sellers often serve both: consultants, software and reprographics vendors who already work with engineers can extend the same pitch.

Illustrative example. The company, fees and results are invented.

Bayou MEP (bayoumep.example), a mechanical, electrical and plumbing engineering firm, wants architecture firms that need an MEP consultant on schools and clinics. It targets Harris County offices with five to 49 employees, 111 by the Census county detail, and narrows them to the 45 whose websites show education or healthcare work. A personal email to each principal, a follow-up with a relevant project sheet and a call earn nine meetings; two become teaming agreements on upcoming bids. Sorting the 111 by project type is the slow part, and Bebop does that research for each firm in the list.

Subject: MEP for [firm]'s next [school or clinic] bid

Hi [first name],

I saw [firm]'s work on [project]. We're an MEP engineering firm in Houston that works for architects on [education or healthcare] projects, and we're looking for one or two new architect partners for the coming bid season.

I can send two project sheets that show how we handle coordination and construction administration on jobs like yours.

Worth a 20-minute conversation? If you're set for MEP, a one-line reply is plenty.

[Your name]
[Company], [postal address]

Next step: compare with the region's contractors in construction companies in Houston.