Updated: May 22, 2026
Location and Projects
Address
10 KEY AVENUE, Frederick, MD, 21701
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Key Construction Company Architect
Key Construction Company, 10 Key Ave, Frederick, MD (Owned by: James E Yonetz) holds a Home Improvement 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.
Their license was verified as active when we last checked. If you are thinking of hiring Key Construction Company, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Key Construction Company Services
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Key Construction Company Contact Information
Address: 10 KEY AVENUE, Frederick, MD 21701
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Building Permits by Key Construction Company
This is a sample of this contractor's permits. Click here to access their complete permit history.
Plumbing permit
Permit #149656|install new bar sink shower toilet & lavatory sink|convert part of ex rec room into a 1/2 bathroom & a wet bar; addition windows & laminate flooring; remove ex closet in master bathroom & install a shower base w/ceramic tile on walls to 6
Valuation:
$65,100
Permit #:
152153
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
Single family dwe...
Plumbing permit
To complete work on ap# 83644 is listed on application and drawings;|covered porch 60sf; part of existing bedroom to be full bathroom and closet 100 sf to create master bedroom;remove one set of interior stairs in kitchen area and addition new stairs to basement. in living room area|
Valuation:
$20,000
Permit #:
153904
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
Single family dwe...
Plumbing permit
***revised by pfay on 7/1/14 to make changes to exisitng plans.***|sfd w/2 car attached garage.|paid extension fee 06/04/13 thru 12-04-13 lw|***9/11/13 revision =change in size of dwg, location of dwg & driveway, new setbacks; no garage; deleting retaining wall; change of disturbed area & cut/fill; submission of new dwg plans; house # added to address|*permit extension fee paid online... see more
Valuation:
$100,000
Permit #:
141254
Status:
issued
Fee:
N/A
Permit Type:
New
Building Type:
Single family dwe...
Plumbing permit
Plumbing for addition over crawl space to include - (1) bathroom tub (2) bathroom sinks (1) shower bathroom (1) toilet (1) washing machine|||344 sq ft addition to master bedroom and master bathroom
Valuation:
$58,730
Permit #:
152854
Status:
issued
Fee:
N/A
Permit Type:
Addition
Building Type:
Single family dwe...
Plumbing permit
Plumbing for finished basement to include bathroom sink sewage pump shower/tub and toilet. ||1, 152 sf of finished basement to be rec.rm office sewing room and full bathroom
Valuation:
$59,775
Permit #:
152853
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
Single family dwe...
Plumbing permit
Single family dwelling 4000, no gas, building permit 147124 for single family dwg||$$$$ energy efficiency compliance method will use prescriptive values and requirements. $$$$
Valuation:
$250,000
Permit #:
148063
Status:
issued
Fee:
N/A
Permit Type:
New
Building Type:
Single family dwe...
Plumbing permit
***revised by pfay on 5/19/2015 to addition a 7.5x10 deck to the rear***|sfd w/1 car attached garage||$$$$ energy compliance method will use prescriptive values and requirements. $$$$
Valuation:
$131,500
Permit #:
131171
Status:
issued
Fee:
N/A
Permit Type:
New
Building Type:
Single family dwe...
Plumbing permit
Assoc. permit #152761|full bathroom with toilet shower lav & ejector pump||alteration of unfinished basement to a finished bathroom to include shower/tub toilet and sink/vanity 70 sqft
Valuation:
$6,500
Permit #:
153055
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
Single family dwe...
Plumbing permit
Single family dwelling w/unfin bsmt; 1-car garage; front porch||$$$$ energy efficiency compliance method will use prescriptive values and requirements. $$$$
Valuation:
$175,000
Permit #:
154188
Status:
issued
Fee:
N/A
Permit Type:
New
Building Type:
Single family dwe...
Plumbing permit
Single family dwelling w/unfin bsmt; 1-car garage; front porch||$$$$ energy efficiency compliance method will use prescriptive values and requirements. $$$$
Valuation:
$200,000
Permit #:
154187
Status:
issued
Fee:
N/A
Permit Type:
New
Building Type:
Single family dwe...
Plumbing permit
Single family dwelling w/unfin.bsmt.; 3-car garage||$$$$ energy efficiency compliance method will follow rescheck report attached to the plans. $$$$
Valuation:
$379,040
Permit #:
153799
Status:
issued
Fee:
N/A
Permit Type:
New
Building Type:
Single family dwe...
Plumbing permit
Existing tenant change to space (suite 100). existing area was storage to now be converted to labs/office area. original occupancy for suite is under #97062
Valuation:
$295,000
Permit #:
140057
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
Nonresidential bu...
Removing all plaster and replacing w/drywall; replace electric & plumbing; no change to layout of dwelling
Valuation:
$70,000
Permit #:
151227
Status:
complete
Fee:
N/A
Permit Type:
Plumbperm
Building Type:
N/A
Plumbing permit
Replacement dwg; demolish permit ap# 133562||$$$$ energy efficiency compliance method will use prescriptive values and requirements. $$$$
Valuation:
$170,000
Permit #:
134498
Status:
issued
Fee:
N/A
Permit Type:
Replace
Building Type:
Single family dwe...
Plumbing permit
Replacement dwg; demolish permit ap# 133562||$$$$ energy efficiency compliance method will use prescriptive values and requirements. $$$$
Valuation:
$170,000
Permit #:
134239
Status:
issued
Fee:
N/A
Permit Type:
Replace
Building Type:
Single family dwe...
Plumbing permit
Assoc. permit #152685|install shower toilet lav to finish basement bath|finish basement of dwg built under #142163
Valuation:
$20,000
Permit #:
153056
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
Single family dwe...
Install plumbing & gas in new single family dwelling 5-bathtubs/2-showers/8-lavs/7-water closets/1-kitchen sink/1-dishwasher/2-wash mach conn/1-laundry tray/1-sump pump/1-floor drain/1-condensate drains/4-sill cocks gas - 1-furnace/1-water heater/1-dryer/2-fireplaces rough-in
Valuation:
N/A
Permit #:
P10003003
Status:
complete
Fee:
$309
Permit Type:
N/A
Building Type:
N/A
Plumbing permit
Replace expired permit ap# 78152|addition with front porch w/unfinished basement extending under porch; adding rear porch & elevated covered walkway to existing dwelling||10/30/2009-rough-in fixtures in basement for future-blh
Valuation:
N/A
Permit #:
147388
Status:
issued
Fee:
N/A
Permit Type:
Addition
Building Type:
Single family dwe...
Removing a wall between the master bedroom closet to make a larger master bedroom closet. removing a wall in the master bathroom to open up the space
Valuation:
$40,740
Permit #:
134187
Status:
Permit Issued
Fee:
$92
Permit Type:
Alteration
Building Type:
Single family dwe...
Plumbing permit
Replacement dwg. (demo #142162)|unfinished basement; front porch||$$$$ energy efficiency compliance method will use prescriptive values and requirements. $$$$
Valuation:
$5,000
Permit #:
143041
Status:
issued
Fee:
N/A
Permit Type:
New
Building Type:
Single family dwe...
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Verified License
BuildZoom confirmed this contractor's license
Key Construction Company License info
Verified License
| License # | 16560 |
| Status | Active |
| State | Maryland |
| Type | Home Improvement |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Key Construction Company at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
Verified License
| License # | 16560 |
| Status | Active |
| State | Maryland |
| Type | Architects |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Key Construction Company at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
91
BuildZoom Score
33
Permits
- Building permit records show that Key Construction Company has worked on 33 permitted projects.
Key Construction Company Employees
JY
James E Yonetz
Owner