Architectural Services (United States) — NAICS 541310

An investor's primer. NAICS = North American Industry Classification System, the U.S. government's standard code for an industry. Figures below prefer official federal statistics; where a number is a market estimate or a forward-looking judgment, the wording says so. Current as of July 2026.

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1. Overview

Architectural services is the business of planning and designing buildings — figuring out what gets built, drawing it, and shepherding the design through construction. It sits at the very front of the construction value chain: an architect's drawings are what a developer finances, a contractor prices, and an engineer details. When a hospital, a stadium, an apartment tower, or a data center is "being designed," this is the industry doing it.[1]

Its economic asset is specialized talent, client relationships, project experience, and professional-liability capacity — not factories or inventory. Three features define the sector for anyone underwriting it:

• It is a people business. The main asset walks out the door every night, capital intensity is low, and profit comes from billing skilled labor at a multiple of its cost.
• It is early-cyclical. Architects are hired roughly 9–12 months before ground breaks, so their billings are a widely watched leading indicator for nonresidential construction.[8]
• It is overwhelmingly private and small-firm. There is essentially no pure-play publicly traded U.S. architecture company. The design leaders are private, employee-owned, or partnership-structured.

Because of that last point, the ways to get exposure differ sharply by investor type:

Editorial view: the sector suits investors who can underwrite people, project delivery, sector mix, and cash collection. It is a poor fit for anyone wanting a clean, listed pure play.

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2. What it is and how it's structured

Scope (NAICS 541310). Establishments primarily engaged in planning and designing residential, institutional, leisure, commercial, and industrial buildings by applying knowledge of design, construction methods, zoning, building codes, and materials.[1] Typical work spans feasibility studies, programming, concept design, construction documents, permitting, bidding support, construction administration, and post-occupancy services. The output is drawings, specifications, and construction administration — not the physical building.

What it excludes (separate NAICS codes — they matter because they carve real "design" work out of the 541310 number):

• 541320 Landscape Architectural Services — site and outdoor design.
• 541330 Engineering Services — structural, civil, mechanical, and electrical engineering (a much larger industry than architecture, and where most integrated firms report).
• 541340 Drafting Services and 541350 Building Inspection Services.
• 541410 Interior Design and 541430 Graphic Design.
• Sector 23 Construction (general contractors and builders) and 531xxx Real Estate.

One company may perform several of these activities, so corporate reporting and NAICS classification are not one-to-one.[1]

Ownership mix. This is a cottage industry with a few giants on top. About three-quarters of architecture firms have fewer than 10 employees, and a large share are sole practitioners.[6] At the same time, firms with 50+ employees hold roughly half of national employment and billings — and the largest players are marquee names (Gensler, Perkins&Will, HKS, HOK, SOM/Skidmore, Owings & Merrill), essentially all private, employee-owned, or partnership-structured.[6][7] Over the past decade the billings share held by the smallest firms has fallen while large firms have gained, so the industry is slowly concentrating even though it remains extraordinarily fragmented.[6]

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3. How big it is

Federal statistics for NAICS 541310 (U.S.):

A few readings. Payroll is about 39% of revenue ($18.7B of $48.6B) — a hallmark of a labor-driven professional service. Revenue per employee runs roughly $250,000–$260,000, and average payroll per worker roughly $99,000.[2][3] (Receipts are a 2022 figure and headcount/payroll are 2023, from different federal programs, so these are approximate and should not be read as a single current market size.)

The undercount caveat — real here, in two directions.

1. Nonemployers are excluded. County Business Patterns counts only establishments with paid employees; Census Nonemployer Statistics separately cover the self-employed with no payroll.[2][5] Because sole practitioners make up a large share of architecture, the ~22,800 establishment count understates the true number of architecture businesses. Our ground-truth file has no nonemployer total for 541310, so we do not state one.
2. In-house and cross-classified design is missing. A large amount of building design happens inside integrated engineering firms that report under Engineering Services (541330), and public agencies run in-house design offices that are not captured here at all. So $48.6B is best read as the revenue of pure-play employer architecture firms — not the total economic value of architectural design performed in the U.S.

(Note: the SBA has proposed raising the 541310 size standard from $12.5M toward ~$16.0M; that change is not reflected in our 2023 figure.[17])

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4. The investable universe

There is no pure-play, publicly traded U.S. architecture stock. The listed names below are diversified proxies whose architecture exposure must be assessed through segment mix, backlog, margins, and acquisitions. (Scale figures approximate, as of 2026.)

Two other public routes give indirect exposure to design activity itself — the "picks-and-shovels" bet:

The design leaders are private (revenue-ranked where public; architecture-firm revenue):

Takeaway: buying "architecture" on the public markets means buying either a mostly-engineering conglomerate or a software company. For a concentrated bet on architecture as a design discipline, the real ownership routes are private (Section 10).

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5. How the money works

Architecture is a billable-hours business. The economic model is labor-heavy:

Gross billings − outside consultants and pass-through costs = net revenue Net revenue − direct labor − overhead = operating profit

Three benchmarks that firms track obsessively:

• Utilization — the share of staff time billable to clients. Firm-wide targets sit around 60–65%, with technical staff at 75–85% and principals lower (they sell work rather than draw it). Utilization is the throttle on revenue: an architect's time is the product, and idle time is lost forever.[11]
• Net (labor) multiplier — net revenue divided by direct billable labor cost. The industry benchmark is roughly 3.0 (target band ~2.75–3.25).[11] Every $1 of billable salary should generate ~$3 of revenue; that spread covers overhead and profit.
• Overhead rate — non-billable costs (rent, admin, business development, benefits, software, professional-liability insurance) as a multiple of direct labor, typically ~150–175%.[11] Because overhead is large and fixed, small swings in utilization move the bottom line sharply — the source of the sector's operating leverage and its thin margins.

Other useful metrics: realization (revenue actually earned vs. standard rates), days sales outstanding (DSO) (collection time), work in process (WIP) (unbilled project work), net revenue per employee (productivity/pricing), and write-offs/claims/insurance costs (project-quality and contract risk). The Deltek Clarity architecture-and-engineering study benchmarks all of these — measures far better suited to this industry than manufacturing capacity utilization or retail same-store sales.[11]

Fee structures. Firms are paid by (a) percentage of construction cost, (b) hourly with a not-to-exceed cap, (c) fixed / lump-sum (stipulated sum), or (d) per square foot, plus reimbursable expenses and additional-services provisions.[12] Work flows through recognizable phases — schematic design, design development, construction documents, bidding, and construction administration — with fees drawn down as milestones complete.

What a good year looks like. No inventory, little fixed capital, so returns are about people productivity, not asset turns. Operating margins on net revenue are typically single digits to low-teens. The key balance-sheet items are receivables and professional-liability reserves. Backlog — months of contracted-but-unbilled work — is the health gauge; it has recently averaged roughly 6 months, longer at large, institutionally focused firms.[8] Because payroll is the dominant cost and hard to cut fast, a demand downturn compresses margins quickly.

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6. What drives demand

Architecture demand is derived demand for construction, filtered through financing conditions. The most important driver is the pipeline of building projects that owners can finance and approve — shaped by interest rates, property values, construction costs, public budgets, and tenant demand.

• The nonresidential construction cycle. Offices, hospitals, schools, labs, industrial plants, hotels, retail, civic buildings. The AIA/Deltek Architecture Billings Index (ABI — American Institute of Architects; a monthly diffusion index where 50 = flat) leads construction spending by 9–12 months.[8]
• Interest rates and credit. Developers need financing; higher rates defer or kill projects, showing up first in architects' new-work inquiries.
• Institutional and public budgets. Health care, higher education, and government facilities are less rate-sensitive and a stabilizer in downturns.[10]
• Structural booms. As of 2025–26 the dominant one is data centers and artificial-intelligence (AI) infrastructure — data-center construction has been running several times prior-year levels — plus industrial reshoring (factories, chip plants).[10][26]
• Renovation vs. new build. With new offices weak, adaptive reuse and office-to-residential conversion are a growing share of work; so are energy-efficiency retrofits, resilience, and climate adaptation.
• Population and migration, which drive where housing, schools, and hospitals get built.

Current picture (reported). The ABI stayed below 50 for essentially all of 2025 and into 2026 — December 2025 read 48.5, and billings declined in every month of 2025 — even as backlogs held up.[8] The July 2026 AIA Consensus Construction Forecast cut its 2026 nonresidential-building-spending outlook from a +1.0% gain (January) to a -0.3% decline, flagging data centers, health care, and selected publicly funded institutional work as the stronger areas.[9] The January 2026 forecast had projected health-care construction growth of ~4.6% in 2026 and ~4% in 2027, and expected office construction to fall at a double-digit rate once data centers are excluded.[10]

Editorial judgment: the most defensible growth is likely to accrue to firms with sector specialization, integrated technical capability, local permitting knowledge, and the ability to deliver complex projects — not necessarily to firms with the largest design headcount.

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7. Regulation

Architecture is a licensed profession, and licensure is the industry's defining regulatory feature.

• State licensure, no national license. The National Council of Architectural Registration Boards (NCARB) counts 55 U.S. licensing jurisdictions (50 states plus D.C. and territories), each issuing its own license; a building's architect of record must be licensed where it is built.[13]
• The path to license. A professional degree accredited by the National Architectural Accrediting Board (NAAB), documented experience through the Architectural Experience Program (AXP), the multi-division Architect Registration Examination (ARE), and continuing education for renewal.[13]
• Firm registration. A firm offering architectural services generally needs a certificate of authorization from the state board, and drawings must be stamped and sealed by a licensed architect who takes legal responsibility.[13]
• Codes and standards. The design must satisfy the International Building Code (IBC) and local amendments, zoning, the Americans with Disabilities Act (ADA) accessibility rules, and increasingly stringent energy codes. Compliance is a core part of the service — and a source of professional liability.

Federal work follows a separate track. Federal Acquisition Regulation (FAR) Part 36 requires architect-engineer services to be selected on demonstrated competence and qualifications at fair and reasonable prices — qualifications-based selection.[14] This implements the Brooks Act, codified at 40 U.S.C. §§ 1101–1104.[15] The SBA size standard for 541310 ($12.5M average annual receipts) affects eligibility for some federal small-business contracting programs; it is not a measure of market size or firm value.[4]

For an investor, licensure is a moat and a constraint: it limits who can compete and protects fees, but it caps scalability (you cannot automate or offshore the licensed act of sealing drawings) and creates real legal exposure. Private buyers should verify state firm-registration rules, ownership structures, professional-liability coverage, government-contract clauses, and license portability before an acquisition.

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8. Competitive dynamics and consolidation

The most fragmented professional-services industry you'll find. The federal concentration data are striking: the four largest firms hold just 5.5% of receipts (CR4), the top eight 8.4%, the top 20 14.8%, and the top 50 only 22.2%; the Herfindahl-Hirschman Index (HHI, a standard concentration measure) is 18 — far below the ~1,500 threshold regulators consider even "moderately" concentrated.[3] In plain terms: thousands of firms, no dominant player, competition on reputation and relationships.

How firms compete. Small firms lead on principal relationships, local knowledge, design reputation, sector specialization, and fast, personalized service. Large firms lead on national/international reach, integrated engineering and consulting, government-contracting experience, ability to staff complex projects, and broader insurance/technology/compliance infrastructure. At the top, work competes on design reputation and specialization — health care, aviation, sports, labs, science-and-technology, and now data centers are high-value niches that command premium fees; at the low end, work commoditizes and competes on price. A persistent middle-market squeeze pushes firms to either get big and multidisciplinary or stay small and specialized.[6]

Consolidation is the live theme, driven by two forces:

1. Integration into engineering/AEC firms. Architecture is increasingly bundled inside larger multidisciplinary firms offering design + engineering + program management under one roof — which is why the public "architecture" names are really engineering conglomerates. Recent examples: Stantec closed its acquisition of Page, a U.S. architecture-and-engineering firm; Perkins&Will merged with workplace-strategy firm A+I.[24]
2. Private-equity roll-ups. PE now accounts for a large share of AEC transactions — one adviser puts it near 40% — buying "platform" firms and bolting on smaller ones to build scale and cross-sell.[25] The large base of aging, employee-owned firms provides a steady supply of sellers (succession is a leading motive), and globalization plays a part too — e.g., Sidara/Dar Group's ownership of Perkins&Will.[23] So consolidation is likely to continue.

Editorial judgment: consolidation can improve purchasing power and project breadth, but it does not automatically create pricing power. Client relationships, senior designers, licenses, culture, and project-quality controls are difficult to integrate.

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9. Risks

• Cyclicality. The single biggest risk. As an early-cyclical indicator, architecture feels construction downturns first; the ABI's 2025–26 sub-50 run is a live example.[8] Projects get deferred or cancelled when financing tightens.
• Thin margins + operating leverage. High fixed overhead and dominant payroll mean a modest revenue drop can erase profit; firms must lay off skilled staff they later struggle to rehire.[11]
• Office exposure. Hybrid work has reduced demand for some office construction and tenant-improvement work.[10]
• Sector concentration. Current growth leans heavily on data centers/AI; if that capex wave slows, a major demand pillar weakens while traditional office stays impaired.[9][10]
• Talent scarcity and wages. The product is scarce licensed talent; shortages and wage inflation pressure margins, and firms depend on rainmakers whose departure can take clients with them (key-person risk).
• Fixed-fee overruns. Poor estimates, scope creep, or design rework can turn a profitable project into a loss.
• Professional liability. Errors, omissions, code issues, and construction disputes can create claims long after billing — a structural cost as premiums rise.[13]
• Collections. Public agencies, developers, and contractors may pay slowly, straining working capital.
• Roll-up / acquisition risk. Consolidation can damage culture, partner retention, and design quality if financial targets overwhelm professional judgment.
• Technology disruption. Generative design and building-information-modeling (BIM) tools raise productivity — a tailwind for margins but a potential threat to the billable-hours revenue model, to junior drafting roles, and to intellectual-property controls.
• Regulatory risk. Licensing, procurement, accessibility, environmental, and building-code requirements change by jurisdiction.

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10. How to invest, and the outlook

Public-market routes (partial exposure only). Use diversified design/engineering companies as proxies — don't treat their consolidated revenue as architecture revenue. When comparing AECOM (ACM), Jacobs (J), Stantec (STN), Arcadis (ARCAY), NV5 (NVEE), or Willdan (WLDN), weigh:[18][19][20][21]

• architecture/buildings exposure within the mix;
• organic vs. acquisition growth;
• backlog quality and conversion;
• utilization, net-revenue margins, DSO, cash conversion;
• public- vs. private-sector client mix;
• professional-liability reserves and claims;
• acquisition discipline and employee retention;
• valuation against normalized earnings, not headline gross revenue.

For a cleaner read on building-design activity, design-software names — Autodesk (ADSK), Bentley (BSY), Nemetschek (NEM), Procore (PCOR) — are higher-margin and more scalable than any single design firm.

Private-market routes (where the real architecture exposure lives):

• Employee ownership. Most leading firms are ESOP- (employee stock ownership plan) or partnership-owned — practically, you gain equity by working there.[22]
• PE-backed AEC platforms and direct deals. Founder succession, minority recapitalizations, specialist platforms, employee-ownership transitions, and private credit are the most actionable entries.[25] Diligence should normalize revenue after pass-through costs and test EBITDA (earnings before interest, taxes, depreciation and amortization) against utilization, collections, claims, partner retention, and backlog conversion; tie earnouts to collected net revenue and retained clients, not unbilled project volume.
• As a cost input. Real-asset and development investors treat architecture as an input to a project's economics (fees a few percent of construction cost), not as a holding.

Outlook. Reported: demand is soft — the ABI signaled contraction through 2025 into 2026, and the AIA now projects nonresidential building spending to dip slightly (~-0.3%) in 2026.[8][9] The Bureau of Labor Statistics (BLS) projects modest growth for architect employment through 2034, citing sustainable design, schools, health care, housing, and renovation.[16] Forward-looking judgment: the near-term hinges on interest-rate relief and on whether the data-center/AI-infrastructure and industrial-reshoring booms broaden beyond a handful of states and clients; institutional work (health care, education) should stay resilient while traditional offices remain weak.[9][10] Longer term, expect continued consolidation (PE- and integrated-firm-led), rising software/AI productivity, and a widening gap between specialized, high-reputation firms that hold pricing power and commoditized generalists that don't. For most investors the practical conclusion is unchanged: architecture is a fragmented, private, cyclical people-business best accessed indirectly — through diversified AEC equities, design software, or private consolidation vehicles — and the strongest candidates combine recurring client relationships, defensible specialties, disciplined project controls, strong collections, and ownership structures that retain senior talent.

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Sources

1. U.S. Census Bureau, "2022 NAICS Manual — 541310 Architectural Services (definition)," 2022. https://www.census.gov/naics/?details=541310&year=2022
2. U.S. Census Bureau, County Business Patterns 2023 — NAICS 541310 (establishments, employment, annual and Q1 payroll), 2023 (Histometrics ingested federal statistics). https://data.census.gov/profile/541310_-_Architectural_services?n=541310
3. U.S. Census Bureau, Economic Census 2022 — Concentration of Largest Firms, NAICS 541310 (receipts, firms, CR4/CR8/CR20/CR50, HHI), 2022 (Histometrics ingested federal statistics). https://data.census.gov/table/ECNSIZE2022.EC2200SIZECONCEN
4. U.S. Small Business Administration, "Table of Small Business Size Standards" — NAICS 541310 ($12.5M), 2023 (Histometrics ingested federal statistics). https://www.sba.gov/document/support-table-size-standards
5. U.S. Census Bureau, "Nonemployer Statistics" (coverage), 2025. https://www.census.gov/programs-surveys/nonemployer-statistics.html
6. American Institute of Architects, "AIA Firm Survey Report 2024" (small-firm character, size distribution), 2024. https://www.aia.org/resource-center/aia-firm-survey-report-2024
7. Architectural Record, "Top 300 U.S. Architecture Firms of 2024 / 2025" (firm revenues and ownership), 2024–2025. https://www.architecturalrecord.com/articles/17547-top-300-us-architecture-firms-of-2025
8. American Institute of Architects / Deltek, "Architecture Billings Index (ABI) — December 2025" and 2025–2026 monthly releases (leading indicator, 48.5, backlog months). https://www.aia.org/resource-center/abi-december-2025-architecture-firm-billings-remain-soft-end-year
9. American Institute of Architects, "July 2026 Consensus Construction Forecast" (2026 nonres spending cut to ~-0.3%), 2026. https://www.aia.org/resource-center/july-2026-consensus-construction-forecast
10. American Institute of Architects, "January 2026 Consensus Construction Forecast" (health care +4.6%; office decline), 2026. https://www.aia.org/resource-center/consensus-construction-forecast/january-2026
11. Deltek, "Clarity: 46th Annual Architecture & Engineering Industry Study" (utilization, net multiplier, overhead, backlog, DSO benchmarks), 2025. https://www.deltek.com/en/-/media/pdfs/2025-aec-clarity-report.pdf
12. American Institute of Architects, "Calculating the Architect's Fee" (fee structures), 2023. https://www.aia.org/resource-center/calculating-architects-fee-there-better-way
13. National Council of Architectural Registration Boards (NCARB), "How to Earn Your Architecture License" (55 jurisdictions; NAAB/AXP/ARE), 2026. https://www.ncarb.org/become-architect/earn-license
14. Acquisition.gov, "Federal Acquisition Regulation, Part 36 — Construction and Architect-Engineer Contracts" (qualifications-based selection), 2026. https://www.acquisition.gov/far/part-36
15. U.S. Code, "40 U.S.C. §§ 1101–1104" (Brooks Act), 2026. https://uscode.house.gov/view.xhtml?path=/prelim@title40/subtitle1
16. U.S. Bureau of Labor Statistics, "Architects: Occupational Outlook Handbook" (employment outlook through 2034), 2025. https://www.bls.gov/ooh/architecture-and-engineering/architects.htm
17. SmallGovCon, "SBA Proposes Increases to Receipts-Based Size Standards" (541310 proposed $12.5M → $16.0M), 2025. https://smallgovcon.com/statutes-and-regulations/sba-proposes-increases-to-receipts-based-size-standards/
18. AECOM, "Fiscal 2025 Annual Report on Form 10-K," 2025. https://investors.aecom.com/sec-filings/sec-filing/10-k/0000868857-25-000013
19. Jacobs Solutions, "Fiscal 2025 Annual Report on Form 10-K," 2025. https://www.sec.gov/Archives/edgar/data/52988/000162828025053316/jec-20250926.htm
20. Stantec, "2025 Annual Report," 2026. https://investors.stantec.com/
21. Arcadis, "Investor Relations Overview," 2026. https://www.arcadis.com/en/investors/
22. Company ownership disclosures — Gensler, HOK, HDR, DLR Group, CannonDesign, HKS (employee-/partner-ownership), 2025–2026. https://www.hok.com/ideas/publications/making-a-difference-by-design-2025-esg-report/
23. Perkins&Will, "Dar Group Rebrands as Sidara," 2023. https://perkinswill.com/news/dar-group-rebrands-as-sidara-at-cop28-in-dubai/
24. Stantec, "Stantec Closes Page Acquisition," 2025, and Perkins&Will, "Architecture Plus Information (A+I) Joins Perkins&Will," 2025. https://www.stantec.com/en/news/2025/stantec-closes-page-acquision-becoming-second-largest-architecture-firm-us
25. Capstone Partners, "AEC Services Sector M&A Update" (PE ~40% of transactions), 2025. https://www.capstonepartners.com/insights/article-aec-services-sector-ma-update/
26. ConstructConnect, "Data Centers Power U.S. Nonresidential Building Growth," 2026. https://news.constructconnect.com/july-2026-data-center-report-year-to-date-spending-four-times-the-2025-record