Top DoD plumbing, heating, and air-conditioning contractors contractors
In the 12 months ending Oct 5, 2026, the Department of Defense obligated $330.6M in net prime contract dollars under NAICS 238220, down 37.4% from $527.7M in the preceding 12 months. 358 prime contractors received positive obligations, and 45 of them accounted for 80% of that spend.
Prime contracts funded by the Department of Defense. Latest 12 months: Oct 6, 2025 to Oct 5, 2026. Source: USAspending.gov.
DoD publishes contract data to USAspending with a 90-day delay, so the most recent months understate DoD activity.
Obligations by fiscal year
Net prime contract obligations by federal fiscal year (October to September).
Top DoD contractors for NAICS 238220
Ranked by positive obligations in the latest 12 months. Share is of all positive obligations in this market.
| # | Contractor | Latest 12 mo | Prior 12 mo | Share | Rank change |
|---|---|---|---|---|---|
| 1 | North State Mechanical Inc | $25.0M | $20.5M | 7.4% | — |
| 2 | Within Interior Design, Inc. | $19.1M | $587K | 5.7% | ▲ 130 |
| 3 | Copper Construction Company, Inc. | $16.8M | $0 | 5.0% | New |
| 4 | Aktarius LLC | $13.6M | $12.7M | 4.0% | ▲ 4 |
| 5 | Mechworks Mechanical Contractors, Inc | $12.6M | $9.1M | 3.7% | ▲ 7 |
| 6 | R & W Construction Company | $12.5M | $6.0M | 3.7% | ▲ 22 |
| 7 | Brymak & Associates, Inc. | $9.7M | $8.8M | 2.9% | ▲ 6 |
| 8 | Puyenpa Construction, LLC | $9.5M | $13.7M | 2.8% | ▼ 1 |
| 9 | Mija Construction Services LLC | $9.0M | $0 | 2.7% | New |
| 10 | Cody M Stevens Construction Inc | $8.8M | $7.0M | 2.6% | ▲ 13 |
| 11 | Rubicon Professional Services LLC | $8.6M | $0 | 2.6% | New |
| 12 | RCA Contracting, Inc. | $8.3M | $2.2M | 2.5% | ▲ 44 |
| 13 | Able Heating & Air Conditioning, Inc | $7.7M | $7.3M | 2.3% | ▲ 8 |
| 14 | Teamgov, Inc. | $6.7M | $14.0M | 2.0% | ▼ 9 |
| 15 | LHH Construction Services, Inc. | $6.2M | $0 | 1.8% | New |
What changed in the last 12 months
Contractors with the largest change in reported obligations versus the preceding 12 months.
Largest gains
- Within Interior Design, Inc.$587K → $19.1M (+$18.5M) · now #2
- Copper Construction Company, Inc.$0 → $16.8M (+$16.8M) · now #3
- Mija Construction Services LLC$0 → $9.0M (+$9.0M) · now #9
Largest declines
- MIK Construction Inc$19.0M → $0 (−$19.0M) · no latest-period obligations
- Kekolu Contracting, LLC$15.4M → $1.8M (−$13.6M) · now #46
- Mckenzie Construction & Site Development LLC$12.3M → $1.1M (−$11.3M) · now #63
New to this market
101 contractors received their first obligations in this market (since FY2022) during the latest 12 months. The largest:
| Contractor | First obligation | Latest 12 mo |
|---|---|---|
| Copper Construction Company, Inc. | Feb 19, 2026 | $16.8M |
| Mija Construction Services LLC | Dec 18, 2025 | $9.0M |
| Rubicon Professional Services LLC | Dec 11, 2025 | $8.6M |
| Access Communications Group, LLC | Jun 30, 2026 | $4.2M |
| JVR Southbay LLC | Dec 18, 2025 | $2.0M |
| Kaiva-Signature JV, LLC | May 29, 2026 | $1.9M |
| Kaiva Services, LLC | May 30, 2026 | $1.7M |
| Conditioned Air, LLC | Jan 15, 2026 | $1.3M |
Where the money comes from
Funding sub-agencies within the Department of Defense, latest 12 months. The funding organization can differ from the office that runs the requirement.
| Funding sub-agency | Latest 12 mo | Prior 12 mo | Change |
|---|---|---|---|
| Department of the Navy | $166.4M | $204.6M | Down $38.3M (18.7%) |
| Department of the Army | $75.9M | $134.1M | Down $58.3M (43.4%) |
| Department of the Air Force | $70.2M | $137.3M | Down $67.1M (48.9%) |
| Washington Headquarters Services | $5.2M | $22.4M | Down $17.2M (76.7%) |
| Defense Logistics Agency | $3.3M | $4.7M | Down $1.4M (29.2%) |
| Defense Health Agency | $3.2M | $1.1M | Up $2.1M (199.2%) |
Potential recompetes
Large awards in this market whose current period of performance ends in the next 18 months. Treat these as research leads: options, extensions, and follow-on vehicles often change the timing.
| Award | Incumbent | Obligated | Current end |
|---|---|---|---|
| W911KB24C0025 | Alcan Builders Incorporated EIE430 REPAIR FIRE SUPPRESSION SYSTEM IN HANGAR, EIELSON AFB, ALASKA | $22.9M | Oct 31, 2026 |
| W912HN22C4005 | GCI-SAC JV LLC CONTRACT IS TO REPAIR/REPLACE HEATING, VENTILATION, AND AIR CONDITIONING SYSTEMS IN BUILDINGS 3405 AND 3425 AT FORT BENNING GEORGIA. | $30.6M | Dec 1, 2026 |
| W912QR24C0040 | Butt Construction Company, Incorporated WRIGHT PATTERSON AIR FORCE BASE REPLACE CHILLERS 88CG F/10271 | $8.4M | Dec 7, 2026 |
| W519TC25CA004 | Ryan & Associates, Inc. THIS REQUIREMENT IS TO PROVIDE NON-PERSONAL SERVICES FOR HEATING, VENTILATING, AIR CONDITIONING AND REFRIGERATION SYSTEMS MAINTENANCE AND REPAIR FOR APPROXIMATELY 100 BUILDINGS… | $10.4M | Jan 13, 2027 |
| N4008526F0297 | Within Interior Design, Inc. LC-3601 SHIELDS HALLS UEH, REPLACE HVAC | $18.5M | Jan 26, 2027 |
| HDEC0325CE001 | Ahtna USA, LLC FT. LEE DECA HQ HVAC PROJECT PERIOD OF PERFORMANCETHE PERIOD OF PERFORMANCE SHALL BE FOR 18 MONTHS. | $7.4M | Mar 24, 2027 |
| W912PL25CA009 | MIK Construction Inc REPLACE EXISTING CHILLERS, REFURBISH COOLING TOWERS, REPLACE PRIMARY/SECONDARY CHILLED WATER PUMPS, CONDENSER WATER PUMPS, RELATED PIPING/CONTROLS, AND PRESSURE DIFFERENTIAL… | $16.0M | Apr 12, 2027 |
| N4008526F0136 | R & W Construction Company MULTIPLE LOCATION DIESEL PUMP REPAIRS | $8.1M | Jun 3, 2027 |
| W9123825CA018 | Mckenzie Construction & Site Development LLC USACE SACRAMENTO DISTRICT HAS A REQUIREMENT FOR DESIGN-BUILD (DB) CONSTRUCTION SERVICES TO REMOVE AND REPLACE THE EXISTING HVAC SYSTEM WITH A NEW GEOTHERMAL HEAT PUMP SYSTEM AT… | $9.6M | Jul 23, 2027 |
| W912QR26C0003 | Rubicon Professional Services LLC REPLACEMENT OF THE HVAC SYSTEM IN F/20824 AT WRIGHT-PATTERSON AIR FORCE BASE (WPAFB), OHIO. | $8.6M | Aug 5, 2027 |
Common questions
Who are the top DoD contractors for NAICS 238220?
In the latest 12 months, North State Mechanical Inc ($25.0M), Within Interior Design, Inc. ($19.1M), Copper Construction Company, Inc. ($16.8M) received the most DoD obligations for plumbing, heating, and air-conditioning contractors.
How concentrated is this market?
The eight largest primes held 35.4% of positive obligations, and North State Mechanical Inc alone held 7.4%. 101 contractors won their first obligations in this market during the latest 12 months.
Are any large DoD NAICS 238220 contracts ending soon?
10 of the largest awards in this market reach their current end date in the next 18 months. The first is W911KB24C0025 (Alcan Builders Incorporated, $22.9M obligated), ending Oct 31, 2026. An end date is a research lead, not a confirmed recompete: options and extensions often move it.
Related markets
NAICS 238220 across all agencies
VA · NAICS 238220
$338.1MUSDA · NAICS 238220
$81.5MDOJ · NAICS 238220
$52.7MHHS · NAICS 238220
$46.5MDHS · NAICS 238220
$30.2MInterior · NAICS 238220
$29.9MState Department · NAICS 238220
$22.4MDOT · NAICS 238220
$21.7MFigures are net obligations on prime contracts (award types A–D) from USAspending.gov, grouped by funding agency and the NAICS code on each award. Net obligations include deobligations and corrections, so they can differ from positive-obligation totals. See methodology.
Ready to connect your pursuit work?
GovEagle gives BD directors, capture managers, and proposal teams one AI workspace from pipeline through proposal, with CMMC/FedRAMP Certified compliance built in.