Updated: Apr 20, 2026
Location and Projects
Headquarters Address
309 SAMANTHA DRIVE, Lewes, DE, 19958
Local address
10 Key Ave, Frederick, MD, 21701
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Robert Roy Frederick Jr Plumber
Robert Roy Frederick Jr, 10 Key Ave, Frederick, MD holds a Heating, Ventilation, Air Conditioning And Refrigeration license and 1 other license according to the Maryland license board.
Their BuildZoom score of 94 ranks in the top 24% of 58,058 Maryland licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Robert Roy Frederick Jr, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Robert Roy Frederick Jr Services
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Robert Roy Frederick Jr Contact Information
Phone Number: (301) 694-0299
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Headquarters Address: 309 SAMANTHA DRIVE, Lewes, DE, 19958
Local Address: 10 Key Ave, Frederick, MD 21701
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Building Permits by Robert Roy Frederick Jr
This is a sample of this contractor's permits. Click here to access their complete permit history.
2nd floor-master bath: remove whirlpool install 1-new shower move 1-toilet install 1-free floating lavatory sinks & faucet same location 1st floor: powder bath: replace only same location: 1-toilet & 1-lavy faucet
Valuation:
N/A
Permit #:
P24003111
Status:
complete
Fee:
$100
Permit Type:
N/A
Building Type:
N/A
Single family dwelling; w unfinished basement (3) car garage front and rear covered porch revision - 6/2/2019 - common driveway easement document (lw) $$$$ energy efficiency compliance method will use prescriptive values and requirements. $$$$
Valuation:
$600,000
Permit #:
196759
Status:
complete
Fee:
N/A
Permit Type:
Plumbperm
Building Type:
N/A
Accessory building pool house & work shop -bldg a/p# 194992 detached accessory structure; 40 x 30 to be used as personal workshop and garage; 24 x 32 to be used as pool house; w 12 x 32 covered porch and wet bar (full bathroom - kgc) house building a/p# 194989
Valuation:
$200,000
Permit #:
196760
Status:
complete
Fee:
N/A
Permit Type:
Plumbperm
Building Type:
N/A
Sfd: instaall gas and plumbing fixtures: (second floor) 1 - water closet 1 - lav 1- shower (basement) 1 - water closet 1- lav 1- shower replace and relocate fixtures in kitchen: 1- sink 1- dishwasher 1 - ice maker gas: 1 - range (in kitchen) **amendment - 5/5/22 - 1- grinder pump**
Valuation:
N/A
Permit #:
P21003418
Status:
complete
Fee:
$227
Permit Type:
N/A
Building Type:
N/A
Single family dwg; **certificate of potability required prior to issuance of coo** *revised 4/15/19 (scw) addition rough-in bathroom in bsmt.* $$$$ energy efficiency compliance method will follow the approved rescheck report attached to the field plans. $$$$ ^^^^this property contains wet soils. see engineer's mitigation report and requirements attached to file in ole and field plans.... see more
Valuation:
$534,452
Permit #:
194477
Status:
complete
Fee:
$500
Permit Type:
Plumbperm
Building Type:
N/A
Well line-bldg a/p# 187806 single family dwg; **certificate of potability required prior to issuance of coo** *revised 4/15/19 (scw) addition rough-in bathroom in bsmt.* $$$$ energy efficiency compliance method will follow the approved rescheck report attached to the field plans. $$$$ ^^^^this property contains wet soils. see engineer's mitigation report and requirements attached to f... see more
Valuation:
$534,452
Permit #:
199016
Status:
complete
Fee:
$146
Permit Type:
Plumbperm
Building Type:
N/A
Plumbing for replacement dwg 2, 497 sf replacement dwg. w/unfin. basement demolish ap# 191069 **4/8/19 revision; changed placement of house; changed setback and submitted revised site plan/building plans-mc** revision 5/22/2019 - wet soils documents (lw) ^^^^this property contains wet soils. see engineer's mitigation report and requirements attached to file in ole. inspector to verify... see more
Valuation:
$200,000
Permit #:
196880
Status:
complete
Fee:
N/A
Permit Type:
Plumbperm
Building Type:
N/A
1 stry. addition w/renovations including new roof on entire building. & 8x23 deck on front & 7x10 bathroom addition; also new windows & siding 264 sf addition area
Valuation:
$212,581
Permit #:
194479
Status:
complete
Fee:
$154
Permit Type:
Plumbperm
Building Type:
N/A
Replace fixtures. kitchen powder and bathroom addition new gasline to fireplace and laundry room -bldg a/p# 191463 interior alterations to exisitng finished area; remove laundry room from exisitng first floor mud room and relocated to exisiting second floor walk-in closet & linen closet to convert them into laundry room move wall between existing mudroom and powder to increase size of... see more
Valuation:
$180,000
Permit #:
194052
Status:
complete
Fee:
$240
Permit Type:
Plumbperm
Building Type:
N/A
2, 484 sf single family dwelling with unfin. basement revision 8/1/19-adding finished bathroom to permit per revision to building permit -dt $$$$ energy efficiency compliance method will use prescriptive values and requirements. $$$$
Valuation:
$200,000
Permit #:
195031
Status:
complete
Fee:
$488
Permit Type:
Plumbperm
Building Type:
N/A
New single family dwelling -bldg a/p# 178580 new sfd; with unfinished basement (finished bathroom in basement) walkout egress 2 car attached garage 3 bedroom 3 bathroom and covered porch $$$$ energy efficiency compliance method will use prescriptive values and requirements. $$$$
Valuation:
$300,000
Permit #:
179681
Status:
complete
Fee:
$385
Permit Type:
Plumbperm
Building Type:
N/A
New sfd; unfinished basement with w/o egress covered porch 3 bedroom 3 bathroom plus 1 rough in in basement. $$$$ energy efficiency compliance method will use prescriptive values and requirements. $$$$
Valuation:
$200,000
Permit #:
183383
Status:
complete
Fee:
N/A
Permit Type:
Plumbperm
Building Type:
N/A
Single family dwelling w/unfin bsmt.; 1-car garage plumbing & utilities for new single family dwelling $$$$ energy efficiency compliance method will use prescriptive values and requirements. $$$$
Valuation:
$200,000
Permit #:
190579
Status:
complete
Fee:
$461
Permit Type:
Plumbperm
Building Type:
N/A
Single family dwg; 2 story home w/a 15 x 24 garage; r-in bathroom in basement; covered porch $$$$ energy efficiency compliance method will use prescriptive values and requirements. $$$$
Valuation:
$200,000
Permit #:
200617
Status:
complete
Fee:
$472
Permit Type:
Plumbperm
Building Type:
N/A
*this permit replaces expired ap #153144* basement finish; 2 rooms are completed by previous owner ( craft room closet & bathroom were completed) new areas to be done are game room tv area & library; this permit covers previous work not done by this owner and the new areas; no case on this permit
Valuation:
$3,500
Permit #:
203555
Status:
complete
Fee:
$98
Permit Type:
Plumbperm
Building Type:
N/A
Interior alteration; convert ex unfinished area into finished area; work is done on 2nd floor; 1st floor bedroom to become stairs to 2nd floor; areas not included in grid are library and unfin mechanical room
Valuation:
$75,000
Permit #:
190751
Status:
complete
Fee:
$154
Permit Type:
Plumbperm
Building Type:
N/A
Buildingapplication
2019-02-26
Install wall mounted laundry tub water cooler drinking fountain and replace vanity sink to wall mount sink for new tenant/change of use-minor building construction and finishing plumbing and electrical for microblading salon/nail spa. demolish a/p# 181820 revision 9/24/18 (kv) - submission for plan review comments
Valuation:
$3,500
Permit #:
189092
Status:
complete
Fee:
$125
Permit Type:
Plumbperm
Building Type:
N/A
Plumbing work for bathroom fixures. 10 x 20 front entry covered porch 10 x 24 right side addition and 66 sq ft of bathroom rennovations
Valuation:
$100,857
Permit #:
203935
Status:
complete
Fee:
$157
Permit Type:
Plumbperm
Building Type:
N/A
508sf of 2nd floor addition to be master bedroom with full bathroom & closet modified existing kitchen dining with new cabinets & lighting & flooring 263sf
Valuation:
$152,135
Permit #:
194481
Status:
complete
Fee:
$154
Permit Type:
Plumbperm
Building Type:
N/A
Plumbing permit
Tenant fit out-demo (1) bathroom relocate drains for (2) new install (2) baths||new tenant fit out for fitness studio; will remove ex bathroom and replace with (2) new bathrooms|(previous occupant was under #87412-great moments)
Valuation:
$100,000
Permit #:
170529
Status:
issued
Fee:
N/A
Permit Type:
Alteration
Building Type:
Nonresidential bu...
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Verified License
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Robert Roy Frederick Jr License info
Verified License
| License # | 79485 |
| Status | Active |
| State | Maryland |
| Type | Heating, Ventilation, Air Conditioning And Refrigeration |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Robert Roy Frederick Jr 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 # | 67846 |
| Status | Active |
| State | Maryland |
| Type | Plumbers |
- BuildZoom verified this license was active as of April 2026.
Verify this license's status for Robert Roy Frederick Jr at the Maryland Department of Labor, Licensing & Regulation.
This is a sample of licensing data; click here to access a complete history.
94
BuildZoom Score
561
Permits
- Building permit records show that Robert Roy Frederick Jr has worked on 561 permitted projects.
Robert Roy Frederick Jr Employees
RJ
Robert Roy Frederick Jr
Owner