> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/naics/541310/ # NAICS code 541310: Architectural Services The companies classified under NAICS 541310, where they are based, how big they are and how the code maps to SIC. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** NAICS 541310 is the code for Architectural Services, in sector 54: Professional, Scientific, and Technical Services. The companies counted under it are mostly very small: 74% have 50 or fewer employees, and 79% are headquartered in the United States. ## What is NAICS 541310? NAICS 541310 is the code for Architectural Services. It belongs to sector 54: Professional, Scientific, and Technical Services. NAICS, the North American Industry Classification System, is the standard U.S. government agencies use to sort businesses by what they mainly do, and each digit narrows the category. Most of the companies counted also carry SIC 8712, Architectural services, in the older SIC system (95%). NAICS is a North American system, so companies outside the US, Canada and Mexico are placed in it by classification. - 74% of the companies counted have 50 or fewer employees, and the middle one is in the 11 to 50 range. - The largest group is headquartered in the United States (79%). Within the US, California is the biggest state (14%). - Most were founded in the 1990s (20%), then the 2000s (20%). **Figure: How NAICS 541310 is built.** The code 541310 split into its parts: sector 54, then subsector, industry group, NAICS industry and U.S. industry. *The six digits of NAICS 541310. Each digit narrows the category.* ## Which companies are classified under NAICS 541310? The biggest by headcount range include Hntb, Foster Partners, M Moser Associates, Populous and Perkins Eastman. Names link to a company profile where we have one. | Company | Headquarters | Employees | | --- | --- | --- | | Hntb | Kansas City, MO | 5,001 to 10,000 | | Foster Partners | London, United Kingdom | 1,001 to 5,000 | | Smithgroup | Detroit, MI | 1,001 to 5,000 | | Kleinfelder | San Diego, CA | 1,001 to 5,000 | | Cobra Perú | Lima, Peru | 1,001 to 5,000 | | Garver | North Little Rock, AR | 1,001 to 5,000 | | Hanmiglobal | Gangnam- Gu, South Korea | 1,001 to 5,000 | | Ia Interior Architects | San Francisco, CA | 501 to 1,000 | | Norr | Toronto, Canada | 501 to 1,000 | | Benoy | London, United Kingdom | 501 to 1,000 | | Arkitema | Aarhus, Denmark | 501 to 1,000 | | Leo A Daly | Omaha, NE | 501 to 1,000 | | Wd Partners | Columbus, OH | 501 to 1,000 | | Skets Studio | New Delhi, India | 501 to 1,000 | | American Structurepoint | Indianapolis, IN | 501 to 1,000 | | Hanson Professional Services | Springfield, IL | 501 to 1,000 | | Shive-Hattery | Cedar Rapids, IA | 501 to 1,000 | | Imar, Engineering Consultants | Riyadh, Saudi Arabia | 201 to 500 | | B H Architects | Toronto, Canada | 201 to 500 | | Hawkins Brown | London, United Kingdom | 201 to 500 | | Architect Hafeez Contractor | Mumbai, India | 201 to 500 | | Studios Architecture | San Francisco, CA | 201 to 500 | | Hmc Architects | Los Angeles, CA | 201 to 500 | | Hta Design | London, United Kingdom | 201 to 500 | | Rios | Los Angeles, CA | 201 to 500 | The table shows the 25 biggest by headcount range, with ties broken by audience size. The charts and percentages below cover every company counted for this page, not just these 25, and companies with fewer than 11 employees are not counted. Headquarters is the location on each company's public profile. ## Where are NAICS 541310 companies based? The largest groups are headquartered in the United States (79%), the United Kingdom (9%) and Canada (3%). **Figure: Where companies in NAICS 541310 are based.** Bars for the share of counted companies in NAICS 541310 headquartered in each country: United States 79%, United Kingdom 9%, Canada 3%, France 3%, Netherlands 1%. *Share of counted companies in NAICS 541310 by headquarters country.* Within the United States, California (14%), New York (10%) and Texas (7%) lead. **Figure: US headquarters of companies in NAICS 541310, by state.** A tile map of the United States shaded by the share of counted US companies in NAICS 541310 headquartered in each state. The largest are California 14%, New York 10%, Texas 7%. *Share of counted US companies in NAICS 541310 by headquarters state. The three largest states are outlined.* ## How big are the companies counted for NAICS 541310? 74% of them have 50 or fewer employees, and the middle one is in the 11 to 50 range. Companies with fewer than 11 employees are not counted. **Figure: Size of companies in NAICS 541310.** Seven columns for the share of counted companies in NAICS 541310 in each employee range: 11 to 50 74%, 51 to 200 18%, 201 to 500 5%, 501 to 1,000 1%, 1,001 to 5,000 1%, 5,001 to 10,000 0%, 10,001+ 0%. *Share of counted companies in NAICS 541310 in each employee range.* ## How old are NAICS 541310 companies? Most were founded in the 1990s (20%), then the 2000s (20%). **Figure: When companies in NAICS 541310 were founded.** Eight columns for the share of counted companies in NAICS 541310 founded in each era: Before 1960 11%, 1960s 6%, 1970s 10%, 1980s 19%, 1990s 20%, 2000s 20%, 2010s 13%, 2020s 0%. *Share of counted companies in NAICS 541310 by the era they were founded in, for the ones that list a founding year.* ## How NAICS 541310 compares - 74% of companies in NAICS 541310 have 50 or fewer employees, against 60% across all NAICS codes on this site. - 14% were founded in 2010 or later, against 30% across all NAICS codes on this site. - New York holds 10% of the US companies here, against 6% across all NAICS codes on this site. ## NAICS 541310 and the SIC system NAICS replaced SIC in 1997, but the two do not line up one to one: companies filed under one NAICS code can carry several SIC codes. These are the ones seen most. | Code | Title | Share of counted | | --- | --- | --- | | SIC 8712 | Architectural services | 95% | | SIC 8711 | Engineering services | 3% | ## Where NAICS codes come from NAICS is maintained by the U.S. Census Bureau with Canada and Mexico and revised every five years; the current edition is NAICS 2022. To check exactly what a code includes, search the [official NAICS index](https://www.census.gov/naics/) or read the Census Bureau's [guide to understanding NAICS](https://www.census.gov/programs-surveys/economic-census/year/2022/guidance/understanding-naics.html). Pick a code by what a company mostly does, not by who it sells to. ## How do you reach the people at NAICS 541310 companies? The people to talk to are usually partners, practice leaders and heads of operations. You can build the list from this code in three prompts to your AI agent. ### 1. Count them (free) Counting who matches never uses credits. ```text Use www.enrich.chat to count the companies with NAICS code 541310 (Architectural Services) ``` ### 2. Find the people (5 credits per person) Name the roles you sell to. Each person returned is 5 credits, and name, title and company are included. ```text Use www.enrich.chat to find the partners, practice leaders and heads of operations at companies with NAICS code 541310, with their titles ``` ### 3. Get their work emails (10 credits each) An email is 10 credits only when one is found. Every email comes with a status: verified, catch-all or unknown. ```text Use www.enrich.chat to find the work emails for these people and tell me which ones are verified ``` ## More to explore Codes next to it: [NAICS 541320: Landscape Architectural Services](https://enrich.chat/naics/541320/)[NAICS 541350: Building Inspection Services](https://enrich.chat/naics/541350/) Others in sector 54: [NAICS 541512: Computer Systems Design Services](https://enrich.chat/naics/541512/)[NAICS 541511: Custom Computer Programming Services](https://enrich.chat/naics/541511/)[NAICS 541110: Offices of Lawyers](https://enrich.chat/naics/541110/)[NAICS 541613: Marketing Consulting Services](https://enrich.chat/naics/541613/)[NAICS 541810: Advertising Agencies](https://enrich.chat/naics/541810/)[NAICS 541820: Public Relations Agencies](https://enrich.chat/naics/541820/)[NAICS 541219: Other Accounting Services](https://enrich.chat/naics/541219/)[NAICS 541940: Veterinary Services](https://enrich.chat/naics/541940/) ## Frequently asked questions ### What is NAICS code 541310? NAICS 541310 is the code for Architectural Services, in sector 54: Professional, Scientific, and Technical Services. ### What is the SIC code for NAICS 541310 (Architectural Services)? 95% of the companies counted carry SIC 8712 (Architectural services), but the two systems do not map one to one. ### Which companies are classified under NAICS 541310? The biggest by headcount range include Hntb, Foster Partners, M Moser Associates, Populous and Perkins Eastman. The page lists 25 with links to their profiles where we have them. ### Where are NAICS 541310 companies based? The largest groups are headquartered in the United States (79%), the United Kingdom (9%) and Canada (3%). ### How big are the companies in NAICS 541310? 74% have 50 or fewer employees, and the middle one is in the 11 to 50 range. Companies with fewer than 11 employees are not counted. ### Is NAICS 541310 the same as a SIC code? No. NAICS replaced SIC as the U.S. federal standard in 1997, and the two do not map one to one. The SIC code seen most among these companies is 8712. ## Try this prompt Find the people at NAICS 541310 companies ```text Use www.enrich.chat to find the partners, practice leaders and heads of operations at companies with NAICS code 541310, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [NAICS 541320](https://enrich.chat/naics/541320/) - [NAICS 541350](https://enrich.chat/naics/541350/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)