Updated: May 06, 2026
Location and Projects
Address
1 Mill Race, Philadelphia, PA, 19019
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Harth Builders Photos
Harth Builders Construction
Awarded Best of Houzz for 2013, 2014, 2015 & 2016 given to only 4% of Houzz professionals!
Harth Builders is a nationally recognized, award winning, residential design-build remodeling firm serving Eastern Montgomery and Central Bucks counties in the Philadelphia suburbs. With a creative design team that includes architects, engineers, interior designers and contractors, we help our clients bring concept to reality while being mindful of their construction budget.
Over 45 years ago, after serving his country as a Marine and veteran of the Korean War, Allyn Harth chose to make homebuilding his life's work. So when he founded Harth Builders in 1996, he began with a long-held belief taught to him by his years of experience – that it takes not only the highest levels of experience, quality, workmanship, service and design to make a home special, but also a personal touch. That is why every project we design and build incorporates each client's own ideas, personalities and dreams. It is the crucial difference between creating a house and "a home with heart." And it is the foundation on which our company continues to build its reputation.
Today, Harth Builders is managed by Allyn and his son, Greg. Together, they represent more than 53 years of experience in remodeling and residential, light commercial, and heavy civil construction. Both father and son hold BS degrees in engineering (industrial and civil.)
We employ a staff of loyal employees and have nurtured strong professional relationships with a core group of subcontractors over the years.
From design and remodeling to additions and custom finishing work, we've got the reputation and the expertise to get the job done beautifully.
From BuildZoom: Harth Builders, 1 Mill Race, Philadelphia, PA (Owned by: Gregory Harth) holds a Contractor license and 3 other licenses according to the Philadelphia license board.
Their BuildZoom score of 119 ranks in the top 1% of 125,106 Pennsylvania licensed contractors.
Their license was verified as active when we last checked. If you are thinking of hiring Harth Builders, we recommend double-checking their license status with the license board and using our project planner to get competitive quotes.
Harth Builders Services
Start a project today:
Custom Home Build
New Home Construction
Other Residential New Const...
Multi-Room Remodel
Kitchen Remodel
Bathroom Remodel
Basement Remodel
Other Residential Remodel
Roofing
Hardwood Flooring
Carpets
Laminate Flooring
Other Flooring
Framing
Backsplash and Countertops
Stonework
Tile Flooring
Other Stone and Tile
Drywall
Interior Plaster
Brick and Blockwork
Other Masonry
Flatwork Concrete
Foundations
Other Concrete
Demolition
Paving, Driveways, and Side...
Excavation and Grading
Other Site Work
Garage Construction
Gutters and Flashing
Skylights
Sea Walls
Patios
Pole Barn
Harth Builders Contact Information
Phone Number: (215) 654-0364
Address: 1 Mill Race, Philadelphia, PA 19019
Harth Builders Philadelphia
Quality
119
99th percentile
Pro tip:
We generally recommend hiring a contractor with a score higher than 95.
Harth Builders has a BuildZoom score of 119, which places them above 99% of 125,106 contractors in Pennsylvania.
Activity
|
8 projects
|
2025 |
|
10 projects
|
2024 |
|
6 projects
|
2023 |
Our building permit records indicate that Harth Builders has worked on at least
24.0 projects over the past 3 years.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
This is an overview of this contractor's activity. Click here to access our complete licensing and building permit database.
Experience
|
17 projects
|
Home Additions |
|
7 projects
|
Multi-room remodels |
|
5 projects
|
Kitchen remodels |
Analyzing permits over the last 4 years shows that Harth Builders mostly works on
home addition
and multi-room remodel
projects.
Pricing
|
2 projects
|
< $5k |
|
2 projects
|
$5k-$20k |
|
8 projects
|
$20k-$50k |
|
10 projects
|
$50k-$100k |
|
3 projects
|
$100k-$250k |
|
2 projects
|
$500k-$1mil |
|
1 project
|
$1mil+ |
The typical size of their permits is approximately $60,000. This graph shows the distribution of these job values.
Pro tip:
For more details about their pricing, check out their recent activity to see how much they have charged for different types of work.
Harth Builders Reviews
3 out of 5 stars, based on
2
reviews
-
By alex179April 10, 2024Provide estimates.$0
-
AnonymousDecember 29, 2015
A wonderful experience working with Harth Builders. Extremely professional associates and a quality of work surpassed by none! Both Greg and Katie were very patient and flexible with us as we changed our minds constantly. Their only concern was making sure we had exactly what we wanted and that we would be totally satisfied with every aspect of the project.
Certainly our builder of choice from here on out!
This is a sample of this contractor's permits. Click here to access their complete permit history.
Alteration of 1st and 2nd floors including existing kitchen powder room primary bathroom and primary walk in closet. alteration of existing covered porch into new office. alteration of portion of existing garage into new mudroom. relocation of laundry from basement to 2nd floor. no change to impervious building coverage and yard setbacks
Valuation:
$889,470
Permit #:
R-2025-93
Status:
filed
Fee:
N/A
Permit Type:
N/A
Building Type:
N/A
For the construction of a detached structure with covered porches. for use as single-family household living with two (2) accessory interior parking spaces. as per approved plans
Valuation:
$1,116,879
Permit #:
RP-2025-000368
Status:
issued
Fee:
N/A
Permit Type:
New construction
Building Type:
N/A
For alterations to an existing attached structure. alterations to include the erection of partition walls provide finishes/furnishings and new framing members. all work to be done per approved plans. if field conditions vary contact design engineer prior to the start of any work. separate permits to be obtained for all other work
Valuation:
$242,008
Permit #:
RP-2024-003447
Status:
issued
Fee:
N/A
Permit Type:
Addition and/or a...
Building Type:
N/A
For interior alterations to an existing semi-detached single-family dwelling as per approved plan. *separate permits required for electrical plumbing and mechanical work* **underpinning is not part of this permit**
Valuation:
$59,026
Permit #:
RP-2025-003746
Status:
complete
Fee:
N/A
Permit Type:
Addition and/or a...
Building Type:
N/A
For the erection of a detached structure for use single-family household living with three (3) accessory interior parking spaces. building is not required to be sprinklered. separate permits required for mep work
Valuation:
$931,887
Permit #:
RP-2024-008029
Status:
issued
Fee:
N/A
Permit Type:
New construction
Building Type:
N/A
For interior alterations to an existing three-story detached structure as per approved plan; for continued use as single-family household living. *separate permits required for electrical plumbing and mechanical work* **underpinning is not part of this permit**
Valuation:
$53,949
Permit #:
RP-2022-005257
Status:
complete
Fee:
N/A
Permit Type:
Addition and/or a...
Building Type:
N/A
Interior renovations and for the second floor (dormer) addition of an existing single family detached structure details as shown on the plans
Valuation:
$125,117
Permit #:
RP-2025-004402
Status:
issued
Fee:
N/A
Permit Type:
Addition and/or a...
Building Type:
N/A
For the erection of an addition and for interior and exterior alterations to an existing attached single-family dwelling per plans. separate permits are required for all associated mechanical electrical and plumbing work
Valuation:
$65,000
Permit #:
RP-2024-006443
Status:
complete
Fee:
N/A
Permit Type:
Addition and/or a...
Building Type:
N/A
For interior alterations to a first floor kitchen bathroom and second floor bathroom in an existing detached structure used as a single-family dwelling as per building application/plan
Valuation:
$34,225
Permit #:
RP-2025-004502
Status:
complete
Fee:
N/A
Permit Type:
Addition and/or a...
Building Type:
N/A
For interior alterations to a semi-detached structure as per approved plan; for use as single-family household living. *separate permits required for electrical plumbing and mechanical work* **underpinning is not part of this permit**
Valuation:
$191,483
Permit #:
RP-2021-009973
Status:
complete
Fee:
N/A
Permit Type:
Addition and/or a...
Building Type:
N/A
For interior alterations and structural modifications to an existing attached single family dwelling per plans. separate permits are required for all associated mechanical electrical and plumbing work. no work proposed on the basement level
Valuation:
$26,195
Permit #:
RP-2023-004955
Status:
issued
Fee:
N/A
Permit Type:
Addition and/or a...
Building Type:
N/A
For the construction alterations throughout an existing attached structure. for a single- family household living. as per plans. *************************no underpinning on this application. separate permits are required for plumbing mechanical. or electrical work. *********************
Valuation:
$64,867
Permit #:
RP-2022-007108
Status:
issued
Fee:
N/A
Permit Type:
Addition and/or a...
Building Type:
N/A
For the construction alterations throughout an existing detached structure to include the replacment of existing deck. for a single- family household living. as per plans. *************************no underpinning on this application. separate permits are required for plumbing mechanical. or electrical work. ********************
Valuation:
$60,832
Permit #:
RP-2021-018407
Status:
complete
Fee:
N/A
Permit Type:
Addition and/or a...
Building Type:
N/A
For the erection of a detached structure; for use as a single family dwelling with three (3) accessory parking spaces as per approved plans. for the installation of mechanical work as per ez permit standard
Valuation:
$1,109,219
Permit #:
RP-2021-007521
Status:
issued
Fee:
N/A
Permit Type:
New construction
Building Type:
N/A
For interior alterations to an existing attached single-family dwelling per plans. separate permits are required for all associated mechanical electrical and plumbing work. basement to remain non-habitable to be used for storage and utilities only
Valuation:
$35,266
Permit #:
RP-2023-010129
Status:
complete
Fee:
N/A
Permit Type:
Addition and/or a...
Building Type:
N/A
Single family dwelling addition and interior renovations - separate permit required for patio replacement revision: combine (2) garage doors into (1) larger door. approved- 10/20/21
Valuation:
$627,408
Permit #:
R-2021-1072
Status:
filed
Fee:
$5,707
Permit Type:
N/A
Building Type:
N/A
For the erection of a 2nd floor addition above the rear one-story attached garage of an existing detached single-family dwelling as per approved plan
Valuation:
$81,162
Permit #:
RP-2024-008748
Status:
complete
Fee:
N/A
Permit Type:
Addition and/or a...
Building Type:
N/A
For the alterations/remodeling of kitchen and dining room to an existing structure. nonstructural work to interior space. for use as a single-family household living. as per approved plans
Valuation:
$40,637
Permit #:
RP-2023-008075
Status:
issued
Fee:
N/A
Permit Type:
Addition and/or a...
Building Type:
N/A
Interior remodel only. kitchen breakfast nook and laundry room renovation. see attached plans for details
Valuation:
$114,258
Permit #:
RP-2024-006313
Status:
complete
Fee:
N/A
Permit Type:
Addition and/or a...
Building Type:
N/A
For interior alterations to an existing single family dwelling per plans. alterations to include installation of a header and lvl beam to expand openings in a bearing wall
Valuation:
$50,000
Permit #:
RP-2021-010001
Status:
complete
Fee:
N/A
Permit Type:
Addition and/or a...
Building Type:
N/A
Verified License
BuildZoom confirmed this contractor's license
Harth Builders License info
Verified License
| HIC # | 055478 |
| Status | Active |
| City | Philadelphia |
| Type | Contractor |
| Business Type | Design Build Remodeler |
- BuildZoom verified this license was active as of May 2026.
Verify this license's status for Harth Builders at the City of Philadelphia Licensed Contractors.
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| HIC # | PA000249 |
| Status | Active |
| State | Pennsylvania |
| Business Type | Design Build Remodeler |
- When BuildZoom last verified this license, it had an expiration date of November, 2025. Check the current license status of Harth Builders with the Pennsylvania Office of the Attorney General
This is a sample of licensing data; click here to access a complete history.
License Not Verified
| HIC # | PA000249 |
| Status | Active |
| State | Pennsylvania |
| Type | 2nd Generation Residential Design-Build Remodeler Providing Concept Through Completion For Your Remodeling Projects. Our Work Includes Additions, Kitchens, Bathrooms, Attic Renovations, House Lifts, Sunrooms, Decks And Whole House Remodeling. |
| Business Type | Design Build Remodeler |
- When BuildZoom last verified this license, it had an expiration date of November, 2023. Check the current license status of Harth Builders with the Pennsylvania Office of the Attorney General
This is a sample of licensing data; click here to access a complete history.
Inactive License
| HIC # | NAT-26795-3 |
| Status | Inactive |
| Nation | Environmental Protection Agency |
| Type | Renovation |
| Business Type | Design Build Remodeler |
- According to the United States Environmental Protection Agency, the status of this license was at one point cancelled. However, this information may have changed.
Check this license's status for Harth Builders at the United States Environmental Protection Agency.
This is a sample of licensing data; click here to access a complete history.
119
BuildZoom Score
Insured
| Insurer | Donegal |
| Insured up to | $5,000,000 |
Insured
| Workers Comp Provider | Donegal |
| Workers Comp Value | $1,000,000 |
45
Permits
- Building permit records show that Harth Builders has worked on 45 permitted projects.
Harth Builders Employees
Allyn Harth
Founder & CEO
Gregory Harth
Owner
Two people from this company, Amy Fisher and Jim Semen, came to my home to inspect some damage and provide estimates for a lawsuit against my condo association. I was going to pay them $950 for the estimates. I was supposed to hear from them within a few days to make the payment. It's been over a month, and I haven't heard from them.
I found another company to provide the estimates for half the cost and even appear up to two times in court to back up the estimates for no extra charge. I was afraid the estimates from Harth Builders would have been overblown and caused me a problem in court anyway.