Holtzolpe inc.

Active in Frederick County
9
Permits on record
Apr 2026
First seen
Jul 2026
Last active
$4.1M
Assessed value worked on, across 8 properties

Trade activity

Electrical 4
Accessory Structure 3
HVAC 2

Permits by year

2026 9

Properties they work on

1985
Median year built
$489K
Median assessed value
88%
Single-family
100%
Owner-occupied

Property profile is based on 8 matched county property records.

Recent permits

DateCountyTypeDescription
Jul 11, 2026 Frederick County Electrical Permit Existing 2 car garage to be converted into bedroom and bathroom .1 -60 amp sub panel .
Jul 11, 2026 Frederick County Electrical Permit remodel existing finished basement .
Jun 2, 2026 Frederick County Electrical Permit Repair existing 200 amp electrical service after lighting strike damage . Replace servic…
May 27, 2026 Frederick County Electrical Permit Install 24kw standby generator .<div>W/o #777508270</div>
Apr 22, 2026 Frederick County Electrical Permit Wire Tesla EV Charger in garage .
Apr 16, 2026 Frederick County Electrical Permit Replace existing Heat pump system with LP Gas furnace .Related plumbing permit #506322
Apr 15, 2026 Frederick County Electrical Permit Install EV charger in garage .Charging pedestals are not allowed to be constructed in the…
Apr 3, 2026 Frederick County Electrical Permit Wire 1 to 1 mini split heat pump .
Apr 1, 2026 Frederick County Electrical Permit Wiring for finished basement .Related building permit #505498

Contractors working in Frederick County see new permits in their service area the week they are filed, with property details attached.

See how it works

Source: county permit records. Updated monthly. Not every filing names a contractor, so these counts are a floor; actual permit activity is usually higher.