MEP Mechanical HVAC
4503 Potomac Ave NW, Washington, DC 20007
ClassificationSUPPLEMENTAL - MECHANICALResidential MEP
Reliable valueNot in source
ContractorNot in source
Permit record
Parties
- Contractor
- Not in source
- Applicant
- Wendell D. Nixon
- Owner
- Stephen Newpol
- Architect
- Not in source
- Engineer
- Not in source
- Contractor license
- Not in source
Building & lot · PLUTO
- Building class
- Not in source
- Zoning district
- Not in source
- Lot area
- Not in source
- Year built
- Not in source
- Units (total)
- Not in source
- Units (residential)
- Not in source
- Units (commercial)
- Not in source
- Floor area
- Not in source
Parcel & enrichment
- Parcel APN
- 1357-0019
- Climate zone (IECC)
- 4A
- Roof area (est.)
- Not derivable — no building-size signal for this permit
- HVAC tonnage (est.)
- Not derivable — no building-size signal for this permit
- Building type
- Not in source
- Building subtype
- MECHANICAL
Geocode & dates
- Coordinates
- 38.9074, -77.0869
- Geocode confidence
- 95%
- Geocode source
- Not in source
- Issued
- Apr 6, 2009
- Applied
- Not in source
- Work class
- Residential
Status
- Current status
- expired
- Source status
- EXPIRED
Provenance
- First seen (no changes since)
- May 18, 2026 · 23:58 UTC
Data-quality checks0 of 12 flagged
0 of 12 data-quality rules flagged anything on this permit.
Checks not flagged
- Geocode out of bounds
- Geocode is sentinel
- Issued date in the future
- Issued date parse bug
- Issued date is placeholder
- Commercial units is placeholder
- Residential units out of bounds
- Residential units is placeholder
- Total units out of bounds
- Total units is placeholder
- Valuation out of bounds
- Valuation is placeholder
Project timeline at this parcel
- Jul 1, 2009EN0900294Other · Expired
- Apr 6, 2009This permitMEP Mechanical HVAC · Expired
- Mar 17, 2009P0902645MEP Plumbing · Issued
Full permit history at this parcel · as of Aug 11, 2026.
Developer details
- Permit #
- M0900865
- Canonical ID
- 243:M0900865
- Source permit ID
- M0900865