Permit Record

Alteration Commercial

4543 Alton Pl NW, Washington, DC 20016

ClassificationAlteration
Reliable valueNot in source
ContractorNot in source
Permit record
Parties
Contractor
Not in source
Applicant
Stephanie Erwin
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
ALTERATION AND REPAIR
Geocode & dates
Coordinates
38.9472, -77.0904
Geocode confidence
95%
Geocode source
Not in source
Issued
Dec 5, 2017
Applied
Not in source
Work class
Residential
Description
Source description

Alteration and repair to existing single family home to include mechanical, electrical, and plumbing

Status
Current status
issued
Source status
PERMIT ISSUED
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, 2017P1802445MEP Plumbing · Expired
  4. Dec 5, 2017This permitAlteration Commercial · Issued

Full permit history at this parcel · as of Jul 8, 2026.

Developer details
Permit #
B1802315
Canonical ID
243:B1802315
Source permit ID
B1802315
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