Permit Record

MEP Plumbing

4543 Alton Pl NW, Washington, DC 20016

ClassificationSUPPLEMENTAL - PLUMBING AND GASResidential MEP
Reliable valueNot in source
ContractorNot in source
Permit record
Parties
Contractor
Not in source
Applicant
David L. Hahn
Owner
Niels J Martens
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
1566-0833
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
PLUMBING AND GAS
Geocode & dates
Coordinates
38.9472, -77.0904
Geocode confidence
95%
Geocode source
Not in source
Issued
Dec 29, 2017
Applied
Not in source
Work class
Residential
Status
Current status
expired
Source status
EXPIRED
Provenance
First seen (no changes since)
May 19, 2026 · 00:09 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

4 permits at this parcel (parcel 1566-0833) · Dec 5, 2017 – Mar 6, 2023

  1. Mar 6, 2023P2304939MEP Plumbing · Issued
  2. Jan 1, 2018E1802778MEP Electrical · Expired
  3. Dec 29, 2017This permitMEP Plumbing · Expired
  4. Dec 5, 2017B1802315Alteration Commercial · Issued

Full permit history at this parcel · as of Aug 11, 2026.

Developer details
Permit #
P1802445
Canonical ID
243:P1802445
Source permit ID
P1802445
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