Company lists · Data refreshed September 2026

Top 25 Architectural conservation firms based in Philadelphia, United States

Name: Architectural conservation firms based in Philadelphia, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 60 companies tracked

RevenueBase identified 60 company matches for architectural conservation firms associated with Philadelphia, United States as of September 2026 and tracks 461 professional contacts across them, including 206 with verified work emails. Across the United States, New York is the largest hub for this category (356 companies); Philadelphia has 60.

This list covers company matches for architectural conservation firms associated with Philadelphia, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 30, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 30, 2026 How this list was built

60Companies

461Contacts tracked

206Verified emails

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The 25 largest architectural conservation firms based in Philadelphia, United States

Ranked by team size

Top 25 of 60 company matches for architectural conservation firms based in Philadelphia, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 30, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Kierantimberlake	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	51-200	74 contacts →
	Exact match “The alchemy of art, science, analysis, and intuition with regard to the built environment is our core mission.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
2	Digsau	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	11-50	41 contacts →
	Exact match “DIGSAU practices contemporary architecture, urbanism and environmental design.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
3	IEI Group, LTD	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	11-50	33 contacts →
	Exact match “IEI is a nationally recognized, award-winning, 20-person architecture, interior design and facilities planning firm based in Northern Liberties for last 20 years.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
4	Kelly Maiello Architects	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	11-50	26 contacts →
	Exact match “Kelly Maiello Architects (formerly Kelly/Maiello) has provided architectural and planning services in Philadelphia and the region for nearly 50 years.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
5	Heritage Consulting Group	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	11-50	25 contacts →
	Exact match “Heritage Consulting Group is a national historic preservation consulting firm specializing in historic tax credits, advising owners and developers of historic buildings through…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
6	CBP Architects	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	11-50	24 contacts →
	Exact match “CBP Architects is an architecture firm providing design services to governmental, educational, institutional and private sector clients.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
7	SMP Architects	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	11-50	15 contacts →
	Exact match “Attention to environmental concerns and historic, cultural, and architectural contexts are the hallmarks of our firm.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
8	Varenhorst	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	11-50	10 contacts →
	Exact match “Varenhorst is an award-winning architectural firm based out of Philadelphia, Pennsylvania.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
9	Hanson Fine Building & Preservation, INC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	1-10	8 contacts →
	Exact match “Hanson Fine Building & Preservation is a construction company that specializes in fine renovations, new home construction, custom additions, sustainable design and construction…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
10	Gnome Architects LLC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	1-10	8 contacts →
	Exact match “As designers rooted in residential architecture, the word home can mean many different things.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
11	Krieger Associates Architects INC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	1-10	8 contacts →
	Exact match “Krieger + Associates Architects Inc is an award-winning Philadelphia firm providing architectural, planning, and interior design services to residential, institutional, and…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
12	Shophouse	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	1-10	7 contacts →
	Exact match “SHOPHOUSE interior architecture + design is a nationally recognized Philadelphia based boutique design firm founded in 2011.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
13	Osborne Construction	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	11-50	7 contacts →
	Exact match “Osborne Construction is an owner-led build collective executing each project with our in-house construction team and project managers on high performance historic renovations and…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
14	K Yoder Design	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	1-10	5 contacts →
	Exact match “Since 2010, k YODER design has evolved into a leading architecture and interiors firm for clients seeking a classic modern aesthetic and cohesion across design, furniture, décor…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
15	Phillip Johnson Construction Company	Exact match	Philadelphia, United StatesHQ recorded Sep 30, 2026	11-50	5 contacts →
	Exact match “PHILLIP JOHNSON CONSTRUCTION CO.(PJC) Established in 1980, this award-winning construction company has been rebuilding historic Philadelphia for 37 years.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
16	Jkrp Architects	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	51-200	4 contacts →
	Exact match “Residential \| Entertainment \| Retail \| Self Storage JKRP Architects is a full-service architectural firm founded on the belief that the client's needs come first.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
17	Woodcock Design	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	1-10	4 contacts →
	Exact match “Based out of 1518 Walnut St Suite 1308, Philadelphia, Woodcock Design is a full service, end-to-end architecture, planning and urban design firm.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
18	Alma Architecture	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	11-50	4 contacts →
	Exact match “ALMA Architecture was founded in 2013 by Adrienne McKinney in Center City Philadelphia.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
19	Lauren Thomsen Design	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	1-10	3 contacts →
	Exact match “Lauren Thomsen Design is an award winning Philadelphia-based architectural design firm.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
20	Powers & Company, INC	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	1-10	3 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
21	Studio 111 Architecture	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	1-10	3 contacts →
	Exact match “Studio Architecture is a Philadelphia based design firm, providing service throughout the region.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
22	Vsba Architects & Planners	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	11-50	3 contacts →
	Exact match “VSBA Architects & Planners serve academic, health care, museum, civic, and institutional clients, offering a full range of services from planning and programming through design…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
23	Campbell Thomas & CO	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	11-50	2 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
24	Hexagon Studio Architects	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	1-10	2 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
25	Blupath Design	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 30, 2026	1-10	2 contacts →
	Exact match “BluPath, an architecture and design firm founded in 2003 by Laura Blau, and Paul Thompson, works closely with clients to design simple, elegant and environmentally sensitive…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “architectural conservation firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 60 architectural conservation firms based in Philadelphia, United States

See the full list, filter by size, metro and specialty, and access 206 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Architectural conservation firms based in Philadelphia, United States at a glance

As of Sep 30, 2026

44.7%Verified-email coverage

7.7Average contacts per company

1-10Median size (employees)

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole United States list rather than for Philadelphia, so it is reported there. Company counts and contact totals on this page are exact for Philadelphia, over 60 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Philadelphia, United States whose business descriptions match “architectural conservation firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 206 professional contacts with verified work emails across the full matched dataset. 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 30, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Architectural conservation firms by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “architectural conservation firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many architectural conservation firms are there based in Philadelphia, United States?

RevenueBase identified 60 company matches for architectural conservation firms associated with Philadelphia, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Kierantimberlake tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most architectural conservation firms?

New York leads the United States with 356 company records, followed by Los Angeles (101) and Chicago (94). Philadelphia has 60.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 206 professional contacts with verified work emails tracked across these 60 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 30, 2026.

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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 SmartSearch, 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.