Typical Phase 1 ESA cost in District of Columbia
$2,700–$6,075
per standard commercial parcel
Compiled from published 2026 industry cost guides (+35% vs. the $2,000-$4,500 national baseline). Full methodology on the cost data page.
Phase 1 Environmental Site Assessment Cost in District of Columbia
Phase 1 Environmental Site Assessment work in the District of Columbia follows the same federal standard as everywhere else in the country: ASTM E1527-21 and the EPA's All Appropriate Inquiries rule. The District carries a premium of about 35% above the national baseline in the published 2026 cost guides, and every consultant working here still has to complete the same records review, site visit, and interviews the standard requires nationwide before a lender or a CERCLA liability-protection buyer will accept the report.
What tends to drive cost up in District of Columbia
What changes jurisdiction to jurisdiction is whose records sit alongside the federal sources (CERCLIS/Superfund, RCRA) every Phase 1 ESA checks. In the District of Columbia, that's the District of Columbia Department of Energy and Environment. A consultant working in DC should already have an established process for pulling those records; confirming they have done so before is a reasonable question to ask when comparing quotes.
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Frequently asked questions: District of Columbia
What does a Phase 1 ESA cost in the District of Columbia?
Published 2026 cost guides put the District of Columbia about 35% above the national baseline, putting a typical standard commercial parcel in the $2,700 to $6,075 range. See the full 50-state table for how that compares to neighboring states.
Does the District of Columbia have its own environmental review process?
Yes. The District of Columbia Department of Energy and Environment runs DC's environmental programs separately from the federal AAI process. A Phase 1 ESA still has to meet the ASTM E1527-21 standard for CERCLA liability protection regardless; the agency's records come into play as one more source a consultant checks, and separately if contamination is found or a disclosure requirement applies.
How long does a Phase 1 ESA take in the District of Columbia?
The standard national turnaround of 2 to 4 weeks from authorization to final report applies in DC the same as elsewhere. Rush service in 5 to 10 business days is commonly available from most firms for a premium, and the completed report is valid for 180 days from the site inspection under ASTM E1527-21.
Other states
Compare the state-level Phase 1 ESA cost range in other active commercial real estate markets.