The Top 20 Multifamily Construction Contractors in 2026

Twenty general contractors and construction managers reported a combined $14.3 billion in multifamily revenue for 2025, according to Building Design+Construction's newest Giants 400 ranking. Suffolk sits alone at the top with just under $2 billion. Below it, the field is tight: Nos. 2 through 9 are separated by less than $260 million.

If you frame, rough in, hang board or set cabinets on apartment jobs, these are the builders whose bid lists matter. Here is who they are, where they are based, what they have been building, and what each one publishes about getting prequalified as a trade partner.

How We Ranked Them

The source is BD+C's Top 115 Multifamily Construction Firms for 2026, published September 29, 2026, as part of the 2026 Giants 400 Report. The measure is 2025 multifamily revenue. The rank order below follows that table exactly, positions 1 through 20, with no firms added, dropped or reordered.

For context, the table also shows each firm's figure from BD+C's companion list, Top 100 Apartment and Condominium Construction Firms for 2026, published October 8, 2026, which measures 2025 apartment/condo revenue. Where a firm does not appear on that list under the same name, we show "not listed."

Some caveats before you read too much into the order:

• The revenue is self-reported by the firms in BD+C's annual survey. Neither BD+C nor we audit it.
• Multifamily and apartment/condo are not the same bucket. BD+C does not print a definition on either page, but the numbers give a clue: for Weis Builders and W.E. O'Neil, apartment/condo revenue plus senior living revenue from BD+C's 2026 senior living table adds up to their multifamily figure to the dollar. That suggests the broader multifamily ranking also picks up senior living and, for firms like Landmark and Treehouse, likely student housing.
• Some figures include joint-venture work, and a couple of projects below were built by JVs.
• Headquarters, projects and prequalification details come from company websites, owner or developer releases, or trade press, linked inline. Where a page did not say something, we did not fill it in.

The Ranking at a Glance

Rank	Contractor	HQ	2025 multifamily revenue	2025 apartment/condo revenue
1	Suffolk	Boston, MA	$2.00B	$1.95B
2	Treehouse, a Core Spaces Company	Addison, TX	$913.2M	$158.9M
3	Clark Group	Bethesda, MD	$835.4M	$773.0M
4	Weis Builders	Minneapolis, MN	$817.1M	$677.7M
5	Summit Contracting Group	Jacksonville, FL	$810.6M	$810.6M
6	Whiting-Turner	Baltimore, MD	$809.0M	$162.4M
7	Landmark Construction	Athens, GA	$735.1M	$22.8M
8	McShane Companies	Rosemont, IL	$720.9M	$720.9M
9	Big-D Construction	Salt Lake City, UT	$662.6M	$662.6M
10	STO Building Group	New York, NY	$628.0M	$628.0M
11	PCL Construction	Colorado (U.S. head office)	$615.8M	$492.6M
12	Swinerton	Concord, CA	$608.0M	$487.2M
13	Juneau Construction	Atlanta, Miami and Tampa	$593.3M	$241.1M
14	Balfour Beatty US	Not stated on its site	$558.8M	$471.5M
15	Harkins Builders	Columbia, MD	$551.1M	$415.5M
16	W.E. O'Neil Construction	Chicago, IL	$550.5M	$388.2M
17	AECOM	Dallas, TX	$511.8M	$511.8M
18	Gilbane Building Company	Providence, RI	$508.4M	$370.2M
19	Clancy & Theys Construction	Raleigh, NC	$475.1M	$332.5M
20	Hunter Roberts Construction Group	New York, NY	$440.0M	$375.0M

Source: BD+C 2026 Giants 400 multifamily and apartment/condominium construction tables (2025 revenue, self-reported). HQ from company websites or trade press, as noted in each entry.

The Top Five: $810 Million and Up

1. Suffolk (Boston, MA)

2025 multifamily revenue: $1,995,600,000. That is about 2.2 times the No. 2 firm. Construction Dive describes the company as "Boston-based Suffolk Construction."

Recent multifamily work: In April 2026, Construction Dive reported that Suffolk will lead construction management on Cal Poly's $1.2 billion, multiphase student housing expansion in San Luis Obispo, which adds about 3,600 new beds. Onsite work began that month, with Building A due to open in fall 2026 and Building B in fall 2027. In Miami, Suffolk is building Miami Starlite, a 39-story, 517-unit Brickell tower for Focus and Group Fox Management.

For subs: We did not find a public prequalification page. Suffolk's trade partner advancement page lists a director-level contact instead.

2. Treehouse, a Core Spaces Company (Addison, TX)

2025 multifamily revenue: $913,218,867. Only $158,947,616 of that shows up as apartment/condo revenue, the biggest gap among the top five. Treehouse's site says it was born out of a partnership with developer Core Spaces and Midwest general contractor Findorff, and lists a contact address in Addison, Texas, without calling it headquarters. A Core Spaces careers page describes Treehouse Builders as a national construction management company focused on build-to-rent.

Recent work: BD+C's own ranking page pictures Hub Bloomington, a student housing development in Bloomington, Indiana, which it says was "developed and built by Treehouse/Core Spaces."

For subs: We did not find a published prequalification page.

3. Clark Group (Bethesda, MD)

2025 multifamily revenue: $835,398,085. Multifamily Dive calls it "Bethesda, Maryland-based Clark Construction," and Clark's offices page lists 7500 Old Georgetown Road there.

Recent multifamily work: In February 2025, general contractor Clark topped out Queensbridge Collective in Charlotte, a 42-story tower with 409 rental units and nearly 30,000 square feet of retail, with completion anticipated in 2027.

For subs: Clark's subcontractors page says all trade contractors complete its Subcontractor Qualification Application through TradeTapp, a BuildingConnected product.

4. Weis Builders (Minneapolis, MN)

2025 multifamily revenue: $817,053,498. The contact page lists its corporate HQ at 2 Meridian Crossings in Minneapolis.

Recent multifamily work: Weis posts its own groundbreaking updates, including Cobia Cove in Holiday, Florida, a 228-unit affordable development, and 1200 E. Diehl Rd. in Naperville, Illinois, with 306 apartments and 15,000 square feet of retail, where it names Hines on the team. The pages are undated and do not state Weis's contract role.

For subs: The prequalification page is one of the most specific on this list. Every sub prequalifies annually and uploads a financial statement, W-9, additional insured endorsements, OSHA 300/300A, an EMR letter, safety manual, bondability letter, supervisor resume and a succession plan.

5. Summit Contracting Group (Jacksonville, FL)

2025 multifamily revenue: $810,630,000, all of it reported as apartment/condo work. Summit's homepage says it is headquartered in Jacksonville, at 7595 Baymeadows Way.

Recent multifamily work: Summit is leading construction of 675 Morgan, a 336-unit garden-style community on a 27-acre site in Savannah, Georgia, scheduled for completion in the second quarter of 2028. In February 2026 it broke ground on Olea on 126, three four-story affordable buildings in Largo, Florida.

For subs: The subcontractors and vendors page asks for references, a COI, a surety letter, three years of financials or tax returns and OSHA logs, and says it is not currently processing applications from framers or cleaning crews.

Ranks 6 to 10: $628 Million to $809 Million

6. Whiting-Turner (Baltimore, MD)

2025 multifamily revenue: $808,957,005. Whiting-Turner's contact page lists headquarters at 300 East Joppa Road, Baltimore. Only $162,380,928 of its multifamily total is apartment/condo work, and the firm is No. 1 on BD+C's 2026 senior living table, which accounts for much of the difference.

Recent multifamily work: Whiting-Turner lists Cadence on Canal in New Haven, Connecticut, 176 affordable apartments that won a 2025 Connecticut Building Council project team award. Construction Dive also reports Whiting-Turner is part of the Cal Poly student housing program alongside Suffolk.

For subs: The prequalification page runs through BuildingConnected and posts a sample questionnaire.

7. Landmark Construction (Athens, GA)

2025 multifamily revenue: $735,112,644. Landmark is the in-house construction arm of student housing developer Landmark Properties, which says it is headquartered in Athens, Georgia. Its apartment/condo figure is just $22,797,744, which fits a firm whose work is mostly student housing.

Recent multifamily work: In October 2026, Landmark Properties delivered The Mark Philadelphia, a 34-story, 363-unit, 909-bed tower in University City, with Landmark Construction as general contractor. A month earlier it delivered The Standard at Syracuse, 210 units and 635 beds.

For subs: The trade partners page does not describe a prequalification platform or document list.

8. McShane Companies (Rosemont, IL)

2025 multifamily revenue: $720,923,685, all of it apartment/condo work. The contact page lists corporate headquarters in Rosemont, Illinois.

Recent multifamily work: In January 2025, McShane announced completion of The Lacy at South Main in Kennesaw, Georgia, 318 units with a structured parking garage, built for repeat client Highpoint Development.

For subs: The subcontractors page uses TradeTapp by BuildingConnected and says there is no cost for subcontractors to submit.

9. Big-D Construction (Salt Lake City, UT)

2025 multifamily revenue: $662,639,530. Big-D's about page timeline notes its headquarters move to a historic downtown Salt Lake City building in 2004.

Recent multifamily work: Big-D's portfolio includes The Nest @ Rio Grande in Salt Lake City, 220 affordable units in a five-story building, where it says it self-performed the structural and site concrete. It also lists Momentum Apartments in West Jordan, a five-story, wood-framed building with 243 units. Neither page is dated.

For subs: The subcontractors page links straight to a BuildingConnected prequalification invite.

10. STO Building Group (New York, NY)

2025 multifamily revenue: $628,000,000. STO's locations page lists its New York headquarters at 330 West 34th Street. Its companies include Structure Tone, Layton Construction, Pavarini and LF Driscoll.

Recent multifamily work: STO company Layton lists the Central Station redevelopment in Phoenix in its multi-unit residential portfolio, describing it as a roughly one-million-square-foot redevelopment. The page is undated.

For subs: Per the subcontractor page, STO companies prequalify through COMPASS, a paid subscription, plus an STOBG supplemental form, with uploads that include EMR, OSHA 300/300A and financial statements.

Ranks 11 to 15: $551 Million to $616 Million

11. PCL Construction (Colorado U.S. head office)

2025 multifamily revenue: $615,753,275. PCL's U.S. head office page says it supports U.S. operations "through a central location in Colorado," and the company describes itself as 100 percent employee-owned.

Recent multifamily work: In October 2025, PCL topped out The Harrison in downtown Tampa, a 20-story mixed-use building with 294 market-rate apartments. A month earlier, PCL and Columbia Ventures broke ground on Summit House, a $117 million, 12-story student housing building with over 550 beds for MSU Denver, set to open in 2027.

For subs: We did not find a published subcontractor prequalification page on PCL's U.S. site.

12. Swinerton (Concord, CA)

2025 multifamily revenue: $608,000,000. A Swinerton news post describes the firm as "headquartered in Concord, California."

Recent multifamily work: Charlotte has been busy for Swinerton. REBusiness reported in April 2024 that general contractor Swinerton was underway on Oxbow, a $97.8 million, six-story community for developer Space Craft. In November 2025, Swinerton and Space Craft topped out Cordo, a $111 million, 287-unit building framed largely in cross-laminated timber, targeted for delivery by summer 2027.

For subs: The prequalification page uses CMiC registration and asks for a financial statement, bonding letter, COI, OSHA 300/300A, three-year EMR history, a line of credit letter and a W-9.

13. Juneau Construction (Atlanta, Miami and Tampa)

2025 multifamily revenue: $593,304,578. Juneau's contact page labels offices in Atlanta, Coral Gables and Tampa as headquarters, so we list all three.

Recent multifamily work: In April 2025, Juneau and Property Markets Group broke ground on One Twenty Brickell Residences in Miami, with 266 residences in Tower 1 and 537 rental units in Tower 2, expected to finish in 2028. Juneau is also general contractor on Hub Clemson, a seven-story, 394-unit, 1,303-bed student housing community near Clemson University for developer and owner Core, slated for completion in early summer 2027.

For subs: The trade partners page runs prequalification through a Procore questionnaire, renewed every year.

14. Balfour Beatty US (headquarters not stated)

2025 multifamily revenue: $558,824,592. Balfour Beatty's U.S. about page does not name a U.S. headquarters, so we are not listing one.

Recent multifamily work: In February 2024, Balfour Beatty topped out 2000/2001 South Bell Street in Arlington, Virginia, for JBG SMITH, a 25-story tower with 355 units and a 19-story tower with 420. In June 2026, a Balfour Beatty and ANDRES Construction joint venture was selected to build 8300 Douglas in Dallas, which includes a 16-story multifamily tower, with completion anticipated in January 2029.

For subs: The partner page says TradeTapp has been its prequalification platform since March 13, 2023.

15. Harkins Builders (Columbia, MD)

2025 multifamily revenue: $551,100,000. The Harkins homepage lists its Baltimore/Washington HQ at 10490 Little Patuxent Parkway in Columbia.

Recent multifamily work: In July 2025, Harkins celebrated the groundbreaking of Ranleagh Court (82 units) and Waverly Winds (123 apartments) in Columbia with Enterprise Community Development, all four-story wood frame. In May 2025 it broke ground on Witter Place in Alexandria, Virginia, 94 homes over a one-story garage.

For subs: The trade portal handles registration and prequalification updates on Harkins' own portal.

Ranks 16 to 20: $440 Million to $551 Million

16. W.E. O'Neil Construction (Chicago, IL)

2025 multifamily revenue: $550,539,859. O'Neil's Chicago office page says its headquarters has been at 1245 W. Washington Blvd. in the Fulton Market/West Loop area since 2012.

Recent multifamily work: In February 2025, O'Neil completed Arden Englewood, a 302-unit community in Englewood, Colorado, for Fifield Companies, with a four-story residential building and a six-story parking structure.

For subs: The subcontractors page sends prequalification through Vertikal.

17. AECOM (Dallas, TX)

2025 multifamily revenue: $511,800,000. The contact page lists global headquarters at 13355 Noel Road, Dallas. Its building work in New York runs under AECOM Tishman.

Recent multifamily work: In July 2026, REBusiness reported that AECOM Tishman is leading construction of One Montague Place in Brooklyn Heights, an estimated $550 million project with 46 condos, 90 rental units and 40,000 square feet of retail, scheduled for 2029. AECOM Tishman is also the builder on 7 Platt Street, a 250-unit tower in Manhattan's Financial District that topped out in November 2024.

For subs: AECOM's supply chain page covers a corporate supplier portal; we did not find a trade prequalification page for AECOM Tishman.

18. Gilbane Building Company (Providence, RI)

2025 multifamily revenue: $508,384,000. Gilbane's history notes it broke ground on its corporate headquarters in Providence in 1978.

Recent multifamily work: Construction Owners reported in October 2026 that Gilbane is general contractor on 1920 Turnbull in the Bronx, a $175 million, 22-story building with 228 apartments, including 137 supportive units, due in March 2029. In Charlotte, a Gilbane and Clancy & Theys joint venture built Radius Dilworth, a 26-story tower with over 600 apartments (announced December 2023).

For subs: The become-a-subcontractor page uses COMPASS and lists financial statements, EMR, OSHA 300/300A and bank, bonding and insurance references.

19. Clancy & Theys Construction (Raleigh, NC)

2025 multifamily revenue: $475,101,889. The Clancy & Theys homepage says the firm established its corporate office in Raleigh, at 421 N. Harrington St.

Recent multifamily work: Clancy & Theys lists The Sterling at Center Point in Wilmington, North Carolina, 265 residences with a parking structure for The Beach Company, plus the Radius Dilworth JV with Gilbane noted above. The project page is undated.

For subs: The trade partners page starts with an interest form before any bidding.

20. Hunter Roberts Construction Group (New York, NY)

2025 multifamily revenue: $440,000,000. The contact page lists 55 Water Street in New York first, ahead of Philadelphia and Newark.

Recent multifamily work: Hunter Roberts handled preconstruction and construction for The Noble at 200 Spring Garden in Philadelphia, a 13-story, 360-apartment building completed in 2024.

For subs: The specialty contractors page has you register an authorized user to complete its web-based prequalification, with a BuildingConnected link.

What the List Tells Subcontractors

Read the prequal pages side by side and three things stand out.

BuildingConnected is the closest thing to a common door. Clark, Balfour Beatty and McShane use its TradeTapp module, and Whiting-Turner, Big-D and Hunter Roberts link to it. COMPASS is the second shared system, used by STO Building Group and Gilbane. Juneau uses Procore, Swinerton uses CMiC, O'Neil uses Vertikal, and Weis and Harkins run their own forms.

The paperwork barely changes from firm to firm. Weis, Swinerton, Summit and Gilbane publish their lists, and they overlap heavily: financial statements, a bonding or bondability letter, COI, EMR and OSHA 300 logs. Keep one current package and you can turn most of these around in an afternoon.

Several of the biggest names build mostly for one developer or one product. Treehouse ties to Core Spaces, Landmark Construction builds for Landmark Properties, and both lean toward student housing. Getting on those bid lists often starts with the developer's own project teams.

On the jobsite side, a lot of the projects above are four- and five-story wood frame or podium buildings. If you are pricing that work, our podium apartment construction cost breakdown and apartment building cost per square foot give you benchmarks to check your number against, and the apartment construction cost per unit guide works from 2025 permit data.

Where Multifamily Construction Is Heading

The Census Bureau's construction spending release for September 2026, published November 2, 2026, puts private new multifamily spending at a seasonally adjusted annual rate of $115.9 billion, per its private construction table. That is essentially flat against $116.1 billion in September 2025. Census counts new apartments and condominiums in that line.

Spending measures work put in place, so it lags new starts by months. We track the starts side, which slowed in the third quarter, in multifamily construction starts for 2026. From the list above, the work that is breaking ground keeps tilting toward student housing (Cal Poly, Hub Clemson, Summit House) and affordable or supportive housing (Olea on 126, Ranleagh Court, 1920 Turnbull).

Bottom Line

Multifamily construction is less concentrated than most sectors. Suffolk took about 14 percent of the top 20's combined revenue, and ranks 11 through 20 together reported more than 2.7 times what Suffolk did. Lots of builders at the $500 million to $900 million level means lots of doors for a trade contractor.

If I were working my way onto these lists, I would pick the three or four that are actually building in my region, get my prequal file current on the platform each one uses, and ask for a smaller first scope. Run the number through our bid calculator before you send it. A clean first job on a 300-unit building is how you get the next one.

FAQ

What source is this multifamily contractor ranking based on?

Building Design+Construction's Top 115 Multifamily Construction Firms for 2026, part of its 2026 Giants 400 Report, published September 29, 2026. Firms are ranked by self-reported 2025 multifamily revenue.

Who is the largest multifamily construction contractor in the U.S.?

Suffolk, with $1.996 billion in 2025 multifamily revenue on BD+C's list. Suffolk is also No. 1 on BD+C's apartment and condominium table, at $1.946 billion.

Why is a firm's apartment/condo revenue so much lower than its multifamily revenue?

BD+C's multifamily ranking appears to include more than apartments and condos. For Weis Builders and W.E. O'Neil, apartment/condo plus senior living revenue equals the multifamily figure exactly. Firms like Landmark Construction and Treehouse, which build student housing, show the widest gaps.

How do subcontractors get prequalified with multifamily contractors?

Most firms here use BuildingConnected or its TradeTapp module. STO Building Group and Gilbane use COMPASS, Juneau uses Procore and Swinerton uses CMiC. Expect to submit financial statements, a bonding letter, insurance certificates, your EMR and OSHA 300 logs.

Will this list change next year?

Almost certainly. It reflects 2025 revenue, and BD+C publishes a new Giants 400 each year. Since the Nos. 2 through 9 firms are within about $260 million of each other, a few big project starts can reshuffle the middle of the list.