Company lists · Data refreshed September 2026
Top 21 Architecture firms based in Portsmouth, United States
RevenueBase identified 29 architecture firms headquartered in Portsmouth, United States as of September 2026 and tracks 313 professional contacts across them, including 136 with verified work emails. New York is the largest hub.
This list covers architecture firms headquartered in Portsmouth, United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 6, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 21 largest architecture firms based in Portsmouth, United States
Ranked by team size| # | Company | RevenueBase Smart Search | Contacts | ||
|---|---|---|---|---|---|
| 1 | Indirect evidence | 68 contacts → | |||
“The Element Group is a strategic design-build partner for banks and credit unions, helping financial institutions plan, design, build, and activate modern branches that connect to…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 2 | Indirect evidence | 57 contacts → | |||
“We’re architects, designers and planners creating innovative, relevant and thoughtful spaces.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 3 | Strong evidence | 48 contacts → | |||
“Market Square Architects is a full-service, nationwide architecture and interiors design firm specializing in multifamily housing, senior living, affordable/workforce housing, and…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 4 | Indirect evidence | 32 contacts → | |||
“Summit Engineering provides structural design services to architects, contractors, design professionals, federal, state, and local owners.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 5 | Indirect evidence | 23 contacts → | |||
“For over four decades, TMS Architects has been designing projects in New Hampshire, throughout New England and beyond.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 6 | Indirect evidence | 23 contacts → | |||
“Tackling climate change one building at a time At Petersen Engineering, we design buildings with fully integrated MEP/FP systems.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 7 | Indirect evidence | 14 contacts → | |||
“Pilot Construction, Inc.’s services extend well beyond the limits of simply building housing units.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 8 | Strong evidence | 7 contacts → | |||
“Residential & Commercial Architectural Firm located in Portsmouth, New Hampshire” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 9 | Strong evidence | 3 contacts → | |||
“Portsmouth Architects is a dedicated group of professionals who seek to reflect and enhance the highest architectural values that characterize our region.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 10 | Indirect evidence | 3 contacts → | |||
“Innovative sustainability & preservation for durable harmony through contextual resilience.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 11 | Indirect evidence | 3 contacts → | |||
“PortOne Architects, Inc.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 12 | Strong evidence | 2 contacts → | |||
“Cox Aviation, LLC provides management and technical consulting services to Architecture and Construction firms.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 13 | Indirect evidence | 2 contacts → | |||
Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 14 | Indirect evidence | 2 contacts → | |||
“Camera-O'Neill Consulting Engineers is a structural engineering design and consulting firm that prides itself on personalized service and attention to detail.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 15 | Strong evidence | 2 contacts → | |||
“A full service architectural and real estate development Firm specializing in design, construction and land acquisitions for financial institutions all over New England for the…” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 16 | Indirect evidence | 2 contacts → | |||
“SOMMA Studios is a design firm based in Portsmouth, New Hampshire.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 17 | Indirect evidence | 2 contacts → | |||
“Design House Interiors is a full-service interior design firm with dedicated professionals working with clients to create beautiful and functional designs.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 18 | Indirect evidence | 1 contacts → | |||
Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 19 | Indirect evidence | 1 contacts → | |||
Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 20 | Strong evidence | 1 contacts → | |||
“McHenry Architecture is a dedicated group of professionals who seek to reflect and enhance the highest architectural values that characterize our region.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
| 21 | Indirect evidence | 1 contacts → | |||
“On Point Consulting Group was formed in early 2019 after President Dean Mello spent 21 years in operational and leadership roles within Northeast Construction Management Firms.” Source: company website · checked Sep 6, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: architecture firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names architecture firms.
- Partial evidence
- Its own public description names part of architecture firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name architecture firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 21 of 29 architecture firms based in Portsmouth, United States
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Architecture firms based in Portsmouth, United States at a glance
As of Sep 6, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Portsmouth, over 29 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among architecture firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Portsmouth, United States whose own description of what they do matches “architecture firms”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names architecture firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among architecture firms, and records with no verified work email. Companies headquartered outside Portsmouth are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 136 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 6, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Architecture firms by metro in the United States
- Architecture firms in New York2473
- Architecture firms in Los Angeles1046
- Architecture firms in Chicago781
- Architecture firms in San Francisco682
- Architecture firms in Houston657
- Architecture firms in Miami648
- Architecture firms in Austin584
- Architecture firms in Seattle564
- Architecture firms in Dallas560
- Architecture firms in Atlanta537
- Architecture firms in Denver445
- Architecture firms in Portland439
- Architecture firms in San Diego391
- Architecture firms in Boston349
- Architecture firms in Washington301
- Architecture firms in Phoenix300
- Architecture firms in Philadelphia279
- Architecture firms in Brooklyn259
- Architecture firms in Charlotte253
- Architecture firms in Nashville230
- Architecture firms in Minneapolis223
- Architecture firms in Tampa215
- Architecture firms in San Antonio205
- Architecture firms in Orlando195
- Architecture firms in Scottsdale193
- Architecture firms in Las Vegas188
- Architecture firms in Columbus176
- Architecture firms in Oakland170
- Architecture firms in Raleigh166
- Architecture firms in San Jose160
- Architecture firms in Irvine156
- Architecture firms in Indianapolis150
- Architecture firms in Cincinnati147
- Architecture firms in Pittsburgh145
- Architecture firms in Fort Lauderdale140
- Architecture firms in Salt Lake City139
- Architecture firms in Birmingham138
- Architecture firms in Baltimore134
- Architecture firms in Kansas City129
- Architecture firms in Richmond125
- Architecture firms in Jacksonville118
- Architecture firms in New Orleans116
- Architecture firms in Charleston115
- Architecture firms in Cleveland111
- Architecture firms in Greenville105
- Architecture firms in Milwaukee103
- Architecture firms in Pasadena101
- Architecture firms in Sacramento100
- Architecture firms in Fort Worth99
- Architecture firms in Sarasota99
- Architecture firms in Omaha98
- Architecture firms in Honolulu93
- Architecture firms in Berkeley92
- Architecture firms in Santa Monica92
- Architecture firms in Grand Rapids91
- Architecture firms in Lexington91
- Architecture firms in Boca Raton90
- Architecture firms in Boulder90
- Architecture firms in New York City89
- Architecture firms in Louisville88
- Architecture firms in Alexandria87
- Architecture firms in Columbia83
- Architecture firms in Detroit83
- Architecture firms in Oklahoma City82
- Architecture firms in Arlington81
- Architecture firms in Newport Beach81
- Architecture firms in Tulsa81
- Architecture firms in Wilmington81
- Architecture firms in Santa Barbara80
- Architecture firms in West Palm Beach80
- Architecture firms in Tucson79
- Architecture firms in Long Beach78
- Architecture firms in Madison78
- Architecture firms in Springfield77
- Architecture firms in Costa Mesa76
- Architecture firms in St Louis75
- Architecture firms in Albuquerque74
- Architecture firms in Boise73
- Architecture firms in Knoxville72
- Architecture firms in Naples72
- Architecture firms in Baton Rouge70
- Architecture firms in Cambridge69
- Architecture firms in Coral Gables69
- Architecture firms in Lafayette68
- Architecture firms in Bozeman66
- Architecture firms in St. Louis65
- Architecture firms in Franklin62
- Architecture firms in Rochester60
- Architecture firms in Bellevue59
- Architecture firms in Chattanooga59
- Architecture firms in Culver City58
- Architecture firms in Marietta58
- Architecture firms in Charlottesville56
- Architecture firms in Memphis54
- Architecture firms in Annapolis53
- Architecture firms in Asheville53
- Architecture firms in Savannah53
- Architecture firms in Durham52
- Architecture firms in Miami Beach52
- Architecture firms in Palo Alto52
- Architecture firms in Fort Myers51
- Architecture firms in Jackson51
- Architecture firms in Winter Park51
- Architecture firms in Plano50
- Architecture firms in Spokane50
- Architecture firms in Concord49
- Architecture firms in Lakewood47
- Architecture firms in Providence47
- Architecture firms in Somerville47
- Architecture firms in West Hollywood47
- Architecture firms in Alpharetta46
- Architecture firms in San Rafael46
- Architecture firms in Bend45
- Architecture firms in Beverly Hills45
- Architecture firms in Colorado Springs45
- Architecture firms in Glendale45
- Architecture firms in Fort Collins44
- Architecture firms in Greenwich44
- Architecture firms in Reno44
- Architecture firms in San Luis Obispo44
- Architecture firms in Ann Arbor43
- Architecture firms in Brentwood43
- Architecture firms in Lincoln43
- Architecture firms in Roswell43
- Architecture firms in Virginia Beach43
- Architecture firms in Carmel42
- Architecture firms in Rockville42
- Architecture firms in Saint Louis42
- Architecture firms in Salem42
- Architecture firms in Delray Beach41
- Architecture firms in Des Moines41
- Architecture firms in Little Rock41
- Architecture firms in Littleton41
- Architecture firms in Overland Park41
- Architecture firms in Syracuse41
- Architecture firms in Buffalo40
- Architecture firms in Eugene40
- Architecture firms in Fairfax40
- Architecture firms in Mesa40
- Architecture firms in Santa Rosa40
- Architecture firms in Englewood39
- Architecture firms in Laguna Beach39
- Architecture firms in Lancaster39
- Architecture firms in Santa Fe39
- Architecture firms in Tacoma39
- Architecture firms in Tempe39
- Architecture firms in Albany38
- Architecture firms in Aspen38
- Architecture firms in Fort Wayne38
- Architecture firms in York38
- Architecture firms in El Paso37
- Architecture firms in Jersey City37
- Architecture firms in New Haven37
- Architecture firms in Richardson37
- Architecture firms in Clearwater36
- Architecture firms in Evanston36
- Architecture firms in Walnut Creek36
- Architecture firms in Carlsbad35
- Architecture firms in Katy35
- Architecture firms in Lubbock35
- Architecture firms in Mclean35
- Architecture firms in Sausalito35
- Architecture firms in Solana Beach35
- Architecture firms in Troy35
- Architecture firms in Wichita35
- Architecture firms in Burlington34
- Architecture firms in Doral34
- Architecture firms in Fresno34
- Architecture firms in Henderson34
- Architecture firms in Norwalk34
- Architecture firms in Sioux Falls34
- Architecture firms in Auburn33
- Architecture firms in Fayetteville33
- Architecture firms in Gainesville33
- Architecture firms in Kirkland33
- Architecture firms in St Petersburg33
- Architecture firms in Tallahassee33
- Architecture firms in Wayne33
- Architecture firms in Westport33
- Architecture firms in Newark32
- Architecture firms in Princeton32
- Architecture firms in Bethesda31
- Architecture firms in Centennial31
- Architecture firms in Danville31
- Architecture firms in Dayton31
- Architecture firms in Duluth31
- Architecture firms in Jupiter31
- Architecture firms in Fargo30
- Architecture firms in Greensboro30
- Architecture firms in Hollywood30
- Architecture firms in Pensacola30
- Architecture firms in Plymouth30
- Architecture firms in Roseville30
- Architecture firms in Venice30
- Architecture firms in White Plains30
- Architecture firms in Akron29
- Architecture firms in Anchorage29
- Architecture firms in Aurora29
- Architecture firms in Gilbert29
- Architecture firms in Palm Beach29
- Architecture firms in Portsmouth29
- Architecture firms in Stamford29
- Architecture firms in Canton28
- Architecture firms in Medford28
- Architecture firms in Naperville28
- Architecture firms in Norfolk28
- Architecture firms in Park City28
- Architecture firms in The Woodlands28
- Architecture firms in Athens27
- Architecture firms in Decatur27
- Architecture firms in Huntington Beach27
- Architecture firms in La Jolla27
- Architecture firms in Montgomery27
- Architecture firms in Orange27
- Architecture firms in San Clemente27
- Architecture firms in Saratoga Springs27
- Architecture firms in Torrance27
- Architecture firms in Weston27
- Architecture firms in Woodstock27
- Architecture firms in Anaheim26
- Architecture firms in Bainbridge Island26
- Architecture firms in Burbank26
- Architecture firms in Cary26
- Architecture firms in Huntsville26
- Architecture firms in Metairie26
- Architecture firms in Mill Valley26
- Architecture firms in Saint Paul26
- Architecture firms in Santa Ana26
- Architecture firms in Sugar Land26
- Architecture firms in Woodland Hills26
- Architecture firms in Billings25
- Architecture firms in Hudson25
- Architecture firms in Manhattan Beach25
- Architecture firms in Mount Pleasant25
- Architecture firms in Newton25
- Architecture firms in Pompano Beach25
- Architecture firms in Riverside25
- Architecture firms in San Mateo25
- Architecture firms in Spring25
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names architecture firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many architecture firms are there based in Portsmouth, United States?
RevenueBase identified 29 architecture firms headquartered in Portsmouth, United States as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
The Element Group, headquartered in Portsmouth, tops this list with the largest team on record.
Which city has the most architecture firms?
New York leads with 2473 headquartered companies, followed by Los Angeles (1046) and Chicago (781).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 136 verified decision-maker contacts tracked across these 29 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 6, 2026.
Ready to reach these companies? Verified emails and direct dials for all 29 architecture firms based in Portsmouth, United States. Start with a free account, no credit card.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.