BARRY DETWILER

Active in Frederick County
15
Permits on record
Apr 2026
First seen
Jun 2026
Last active
$2.4M
Assessed value worked on, across 15 properties

Trade activity

Fire Protection 15

Permits by year

2026 15

Properties they work on

2009
Median year built
$490K
Median assessed value
80%
Single-family
60%
Owner-occupied

Property profile is based on 15 matched county property records.

Recent permits

DateCountyTypeDescription
Jun 23, 2026 Frederick County Fire Permit Install NFPA13D wet fire sprinkler system for SFD w/ (39) sprinkler heads
Jun 9, 2026 Frederick County Fire Permit Install nfpa 13d wet fire sprinkler system with (30) sprinkler heads for SFD.Related buil…
Jun 9, 2026 Frederick County Fire Permit Install NFPA 13D wet fire sprinkler system with 36 sprinkler heads for SFD.RELATED BUILDI…
Jun 1, 2026 Frederick County Fire Permit Install fire suppression system, NFPA 13D
May 29, 2026 Frederick County Fire Permit Install wet fire sprinkler system for SFD 13D 36 Heads<div>Related Building Permit #50566…
May 21, 2026 Frederick County Fire Permit NPFA 13D with (4) Fire protection for basement fitout.<div>Related building permit #50590…
May 20, 2026 Frederick County Fire Permit Basement fit-out for sprinkler system&nbsp;<div>BP 505104&nbsp;</div>
May 12, 2026 Frederick County Fire Permit Install wet fire sprinkler system for SFD
May 8, 2026 Frederick County Fire Permit Install NFPA 13D wet fire sprinkler system with (46) sprinkler system for new SFDRelated …
May 5, 2026 Frederick County Fire Permit Install NFPA 13D wet fire sprinkler system (40) for SFDRelated building permit #492314

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.