Top Interior commercial and institutional building construction contractors
In the 12 months ending Oct 5, 2026, the Department of the Interior obligated $573.4M in net prime contract dollars under NAICS 236220, down 20.3% from $719.8M in the preceding 12 months. 263 prime contractors received positive obligations, and 49 of them accounted for 80% of that spend.
Prime contracts funded by the Department of the Interior. Latest 12 months: Oct 6, 2025 to Oct 5, 2026. Source: USAspending.gov.
Obligations by fiscal year
Net prime contract obligations by federal fiscal year (October to September).
Top Interior contractors for NAICS 236220
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 | Terra Site Constructors LLC | $60.1M | $582K | 10.2% | ▲ 114 |
| 2 | Tocci Construct LLC | $50.2M | $0 | 8.6% | New |
| 3 | RJS Construction Inc | $29.4M | $14.9M | 5.0% | ▲ 9 |
| 4 | Centerre Construction, Inc. | $19.2M | $0 | 3.3% | New |
| 5 | Ahtna Global LLC | $13.0M | $8.3M | 2.2% | ▲ 16 |
| 6 | Bookcliff Partners, LLC | $13.0M | $0 | 2.2% | New |
| 7 | Northern Management Services, Inc. | $12.6M | $8.3M | 2.1% | ▲ 15 |
| 8 | VIP Structures, Inc. | $12.5M | $0 | 2.1% | New |
| 9 | Lacy Mechanical Inc | $12.1M | $15.6M | 2.1% | ▲ 1 |
| 10 | Ames 1, LLC | $11.6M | $11.7M | 2.0% | ▲ 7 |
| 11 | ARK Construction Management LLC | $11.3M | $3.5M | 1.9% | ▲ 37 |
| 12 | Stone & Lime Imports, Inc | $11.2M | $18.6M | 1.9% | ▼ 4 |
| 13 | Tepa EC, LLC | $11.2M | $108.8M | 1.9% | ▼ 12 |
| 14 | Mckenzie Construction & Site Development LLC | $10.6M | $1.3M | 1.8% | ▲ 67 |
| 15 | Diversified Construction of Oklahoma, Inc. | $9.6M | $0 | 1.6% | New |
What changed in the last 12 months
Contractors with the largest change in reported obligations versus the preceding 12 months.
Largest gains
- Terra Site Constructors LLC$582K → $60.1M (+$59.5M) · now #1
- Tocci Construct LLC$0 → $50.2M (+$50.2M) · now #2
- Centerre Construction, Inc.$0 → $19.2M (+$19.2M) · now #4
Largest declines
- Tepa EC, LLC$108.8M → $11.2M (−$97.7M) · now #13
- Stronghold Engineering Inc$37.7M → $2.4M (−$35.3M) · now #56
- Medvolt - Roundhouse JV$34.3M → $119K (−$34.2M) · now #175
New to this market
78 contractors received their first obligations in this market (since FY2022) during the latest 12 months. The largest:
| Contractor | First obligation | Latest 12 mo |
|---|---|---|
| Tocci Construct LLC | Sep 16, 2026 | $50.2M |
| Centerre Construction, Inc. | Apr 7, 2026 | $19.2M |
| Bookcliff Partners, LLC | Mar 4, 2026 | $13.0M |
| VIP Structures, Inc. | Sep 22, 2026 | $12.5M |
| Diversified Construction of Oklahoma, Inc. | Apr 22, 2026 | $9.6M |
| Gideon Contracting, Limited Liability Company | Mar 4, 2026 | $3.6M |
| V. Lopez JR. & Sons General Engineering Contractors, Inc | Feb 24, 2026 | $3.5M |
| Calvin L Wadsworth Construction Company Limited Liability Company | Sep 18, 2026 | $2.6M |
Where the money comes from
Funding sub-agencies within the Department of the Interior, 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 |
|---|---|---|---|
| National Park Service | $383.8M | $407.2M | Down $23.4M (5.7%) |
| U.S. Fish and Wildlife Service | $79.7M | $94.6M | Down $14.9M (15.7%) |
| Bureau of Indian Affairs and Bureau of Indian Education | $52.8M | $89.1M | Down $36.3M (40.8%) |
| Bureau of Land Management | $32.1M | $48.9M | Down $16.8M (34.4%) |
| Bureau of Reclamation | $12.1M | $74.1M | Down $62.0M (83.6%) |
| U.S. Geological Survey | $9.1M | $5.0M | Up $4.1M (83.2%) |
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 |
|---|---|---|---|
| 140P2023C0014 | Nickerson & O'day, Inc. ACAD 151309, DEMOLISH AND CONSTRUCT NEW MAINTENANCE FACILITY (GAOA PROJECT), ACADIA NATIONAL PARK, HANCOCK COUNTY, MAINE | $35.4M | Dec 31, 2026 |
| 140G0322C0005 | Hensel Phelps Construction Co CONSTRUCTION OF USGS FACILITIES ON BIG ISLAND OF HAWAII | $118.0M | Feb 28, 2027 |
| 140P2025C0054 | Medvolt - Roundhouse JV HOSP 318915 REHABILITATE PARK BATHHOUSES | $34.4M | Mar 17, 2027 |
| 140P2023C0038 | Perini Management Services, Inc. EVER 244476, CONSTRUCT MARJORY STONEMAN DOUGLAS VISITOR CENTER, EVERGLADES NATIONAL PARK, FL | $49.1M | May 19, 2027 |
| 140P2025C0030 | Stronghold Engineering Inc PEFO 267538 REHABILITATE PAINTED DESERT COMMUNITY COMPLEX | $40.1M | Jun 1, 2027 |
| 140A1623F0007 | Cherokee CRC LLC CRYSTAL BOARDING SCHOOL DESIGN BUILD | $80.2M | Jun 15, 2027 |
| 140A1622F0158 | Tepa EC, LLC T'IIS NAZBAS COMMUNITY SCHOOL & 20 QUARTERS - DESIGN BUILD | $97.1M | Sep 21, 2027 |
| 140A1623F0064 | Cherokee CRC LLC CHI CHIL TAH SCHOOL REPLACEMENT | $87.6M | Nov 6, 2027 |
| 140A1624F0105 | Tepa EC, LLC MANY FARMS HIGH SCHOOL CONSTRUCTION BUILD. | $220.6M | Dec 7, 2027 |
| 140P2024C0054 | Tutor Perini Corporation GOGA 311373 ALCATRAZ PRISON HOSPITAL WING SEISMIC AND STABILIZE POCS: CO, JOHN_FIFE@NPS.GOV, CS, GABRIEL_CASTELLANOS@NPS.GOV | $51.2M | Apr 3, 2028 |
Common questions
Who are the top Interior contractors for NAICS 236220?
In the latest 12 months, Terra Site Constructors LLC ($60.1M), Tocci Construct LLC ($50.2M), RJS Construction Inc ($29.4M) received the most Interior obligations for commercial and institutional building construction.
How concentrated is this market?
The eight largest primes held 35.7% of positive obligations, and Terra Site Constructors LLC alone held 10.2%. 78 contractors won their first obligations in this market during the latest 12 months.
Are any large Interior NAICS 236220 contracts ending soon?
10 of the largest awards in this market reach their current end date in the next 18 months. The first is 140P2023C0014 (Nickerson & O'day, Inc., $35.4M obligated), ending Dec 31, 2026. An end date is a research lead, not a confirmed recompete: options and extensions often move it.
Related markets
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$657.8MUSDA · NAICS 236220
$367.2MFigures 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.
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