Updated: May 29, 2026
Location and Projects
Address
20233 Old York Road, Manchester, MD, 21102
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John William Ernst Electrician
John William Ernst, 20233 Old York Rd, Manchester, MD holds a Electricians license and 1 other license according to the Maryland license board.
Their BuildZoom score of 91 ranks in the top 37% of 58,058 Maryland licensed contractors.
If you are thinking of hiring John William Ernst, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
John William Ernst Contact Information
Phone Number: (410) 329-2084
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Address: 20233 Old York Road, Manchester, MD 21102
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This is a sample of this contractor's permits. Click here to access their complete permit history.
Electrical permit
Core permit for 2 story office building; areas not lised in grid are sprinkler room med/gas room stairs elevator telephone room & janitors closet ***revised 1/17/08 to change setbacks***kd canopy sq. ft. is 1024.|02/06/2008-revised permit to addition canopy sf of 1024 sf-blh
Valuation:
$5,219,000
Permit #:
65589
Status:
issued
Fee:
N/A
Permit Type:
New
Building Type:
Nonresidential bu...
Electrical permit
Sp-94-10;construct building shell icluding concrete footings, cmu foundation walls, structural steel, exterior masonry veneer, metal stud|framing/ext.gwb sheathing roof, minor electrical, minor plumbing, minor hvac, sprinkler system for shell per nfpa requirements.;electrical rm.&|mechanical rm.; **shell building 2**|***waived---system generated 130.00 fee after intering $192.00 fee p... see more
Valuation:
$1,062,000
Permit #:
22487
Status:
issued
Fee:
N/A
Permit Type:
New
Building Type:
Nonresidential bu...
Electrical permit
Construc building shell including concrete footings, cmu wall, structural steel, exterior masonry veneer, metal stud framing/ext.gwb sheathing roofing, slab on grade, minor electrical , minor plumbing, minor hvac, sprinkler system for shell per nfpa requirements; electrical room. & mechanical room. ** shell for building 1 ** shell building #1|****waived fees only a shell bldg.ha
Valuation:
$1,064,000
Permit #:
22276
Status:
issued
Fee:
N/A
Permit Type:
New
Building Type:
Nonresidential bu...
Electrical permit
Tenant fitout for western services; interior tenant fitout of shell structure to include gwb partitions gwb & acoustical ceilings floorings & misc. finish items core permit #26699 & shell permit #14287|site plan -sp-94-10||building 2|||
Valuation:
$900,000
Permit #:
42126
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
Nonresidential bu...
Electrical permit
New tenant fit out. shell permit is 48248. sp 98-36. parcel was changed for this permit (the correct tax id is 01-045687). shell was excepted before lots were recorded. assembly/bottling area in addition to others listed in grid
Valuation:
$625,000
Permit #:
62851
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
Nonresidential bu...
Electrical permit
Core permit for new office building (includes shell under this permit) this is building #2 on site plans; will include footings foundation walls exterior wall framing r-in plumbing electric; sprinkler & electrical room
Valuation:
$3,359,950
Permit #:
56755
Status:
issued
Fee:
N/A
Permit Type:
New
Building Type:
Nonresidential bu...
Electrical permit
Install insulation for exterior walls and install pertition walls for an electrical;mechanical/sprinkler rooms core permit";98 sf mech.room & 206 sf of elect. room * building 1*||shell permit #14217|site plan- sp-94-10|***declared value ref. shell permit
Valuation:
N/A
Permit #:
35341
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
Nonresidential bu...
Install insulation for exterior walls and install pertition walls for an electrical;mechanical/sprinkler rooms core permit";98 sf mech.room & 206 sf of elect. room * building 1* shell permit #14217 site plan- sp-94-10 ***declared value ref. shell permit
Valuation:
$0
Permit #:
28729
Status:
Complete
Fee:
$180
Permit Type:
Alteration
Building Type:
Nonresidential bu...
Electrical permit
Install insulation for exterior walls and install interior partitions|for electrical and sprinkler/mechanical rooms.|98sf mech.room, 206sf elect.room; core permit"|shell permit #14287|site plan -sp-94-10|declared value ref. #14287|building 2|||
Valuation:
N/A
Permit #:
35342
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
Nonresidential bu...
Install insulation for exterior walls and install interior partitions for electrical and sprinkler/mechanical rooms 98sf mech.room, 206sf elect.room; core permit shell permit #14287 site plan -sp-94-10 declared value ref. #14287 building 2
Valuation:
$0
Permit #:
28730
Status:
Complete
Fee:
$180
Permit Type:
Alteration
Building Type:
Nonresidential bu...
Residential electrical low voltage permit
2014-01-16
Single family dwelling install (45) low voltage devices - (6) video cable outlets (4) telephones. (10) audio (25) security b13002960 4104840363
Valuation:
N/A
Permit #:
E14000285
Status:
complete
Fee:
$72
Permit Type:
N/A
Building Type:
N/A
Install 10 video 5 phone 5 audio & 15 security devices 7/12/12 address corrected to 2945 burrows lane per ded (was sunnyside lane)**b12002120 4104840363
Valuation:
N/A
Permit #:
E12005584
Status:
complete
Fee:
$72
Permit Type:
N/A
Building Type:
N/A
3-sty medical office building w/parking garage below-carroll hospital ctr
Valuation:
$7,708,124
Permit #:
BP-07-2528A
Status:
issued
Fee:
$34,290
Permit Type:
N/A
Building Type:
N/A
New-2 story bldg-slab-dining hall, classrms;covered walkway to ex.bldg
Valuation:
$1,503,599
Permit #:
BP-07-2362
Status:
issued
Fee:
$9,539
Permit Type:
N/A
Building Type:
N/A
New commercial building (shell only) knorr brake"-int.fit out 12-1533
Valuation:
$7,986,461
Permit #:
BP-12-0500
Status:
issued
Fee:
$39,648
Permit Type:
N/A
Building Type:
N/A
Install 10 video 5 phone & 10 audio devices2-story full basement 10r 3fb 1hb & garage (4br) opt fp & deck finish l/l b12002178 4104840363
Valuation:
N/A
Permit #:
E12005585
Status:
complete
Fee:
$72
Permit Type:
N/A
Building Type:
N/A
Addition w/int.renovations to walmart to convert to super walmart
Valuation:
$3,000,610
Permit #:
BP-10-0122B
Status:
issued
Fee:
$17,531
Permit Type:
N/A
Building Type:
N/A
1st presbyterian church install 45 low voltage receptacles 9 receptacles 2 flourescent light fixtures & 2 switches no list 4103292084 b11003151
Valuation:
N/A
Permit #:
E11005534
Status:
complete
Fee:
$210
Permit Type:
N/A
Building Type:
N/A
Interior fit out for knorr brake (bp-12-0500 shell only)
Valuation:
$18,000,000
Permit #:
BP-12-1533
Status:
issued
Fee:
$6,600
Permit Type:
N/A
Building Type:
N/A
Electrical permit
Core permit for 1-story new bldg; bldg#1 in westview south; electrical & sprinkler room included on this permit.|*** structural revision 03/29/2007*** lw
Valuation:
$3,100,000
Permit #:
56754
Status:
issued
Fee:
N/A
Permit Type:
New
Building Type:
Nonresidential bu...
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Verified License
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John William Ernst License info
Verified License
| Status | Active |
| State | Maryland |
| Type | Electricians |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for John William Ernst at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| Status | Active |
| State | Maryland |
| Type | Qualified Agent Master Electrician |
- When BuildZoom last verified this license, it had an expiration date of November, 2014. Check the current license status of John William Ernst with the Maryland Department of Labor, Licensing & Regulation
This is a sample of licensing data; click here to access a complete history.
91
BuildZoom Score
220
Permits
- Building permit records show that John William Ernst has worked on 220 permitted projects.
John William Ernst Employees
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John William Ernst
Owner