Local Roofers Who Know Lambertville's Historic Homes and Flood-Prone Blocks

Much of Lambertville’s downtown housing is well over a century old and sits inside a historic district, while the low-lying blocks near the river carry drainage problems most of Hunterdon County never deals with. A roofing contractor in Lambertville has to read that difference.

William Penn Roofing & Exteriors has worked here and across the surrounding river towns since 2008, from the downtown core out to West Amwell, Hopewell, and across the bridge into Solebury. We are licensed in New Jersey and Pennsylvania, we know how the permit and historic review process works, and every project carries manufacturer and workmanship warranties.

“Really great experience the whole way through with this company.” Elyse G.

What Lambertville Owners Say About Our Work

Most of our work here comes from neighbors passing our name down the street. Read the reviews and judge the pattern yourself: fast answers on active leaks, repair-first assessments, and job sites left clean.

    
 
 
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   G Aldridge 
 
 
 
 Trustindex verifies that the original source of the review is Google. Amazing beyond our expectations. Project Specialist, Kim was very professional, great follow through and knowledgeable. He took his time to thoroughly explain the new roof installation process and proposal.  The on-site project manager, Will kept us updated throughout the project and his crew were punctual and finished on time. Great clean up after job completion. Also, the office manager, Ashley was responsive and very accommodating.  Highly recommend.
  
 
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   Megan Lynch 
 
 
 
 Trustindex verifies that the original source of the review is Google. Dave with WPR replaced the roof on our sunroom as well as siding and trim on the front of our house. His crew arrived on time, were professional & cleaned up after they finished. My husband & I are extremely happy with the finished product. We would recommend WPR to anyone needing roofing, trim, siding or gutters. You can trust this company.
  
 
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   Ian Smith 
 
 
 
 Trustindex verifies that the original source of the review is Google. I had the pleasure of working with the owner David of William Penn Roofing. He was very helpful with making all of the tough choices with having so many options. The work was completed on time, even in the bad weather. They were very thorough in their cleanup as well. I would highly recommend them for any of your roofing or siding needs! Even there show van as all of the options inside so you can see them in person.
  
 
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   Mike 
 
 
 
 Trustindex verifies that the original source of the review is Google. I had roof damage from high winds and reached out for help. Dave responded quickly, arrived promptly, and thoroughly inspected the roof. He identified that the damage was isolated to one area and was able to repair it on the spot. His professionalism, efficiency, and attention to detail were outstanding. I truly appreciated his quick response and quality workmanship. Highly recommend his services to anyone in need of a reliable and skilled roofer!
  
 
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   Rich Gleeson 
 
 
 
 Trustindex verifies that the original source of the review is Google. Did my roof and banged it out in a single day.  Super professional and great communication on the process and timing. Would recommend and use again.
  
 
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   Jethro Pepe 
 
 
 
 Trustindex verifies that the original source of the review is Google. We recently had William Penn Roofing replace our roof and they did an incredible job from top to bottom. The representative, Kim, did a great job of getting our quote and presenting options to us. The roofing team did a superb 1-day job and cleaned up our yard well. The project manager on the job was there the whole time to answer our questions also! I highly recommend.
  
 
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   Sven Hedberg 
 
 
 
 Trustindex verifies that the original source of the review is Google. Our roof replacement on 274 East Court Street, Doylestown, was expertly done by William Penn Roofing with a minimum of disturbance to neighbors and traffic. David La Salle’s initial inspection of the failing roof was thorough and quickly followed by a quote. Scheduling and execution were efficient and communication between crew, tenants, neighbors and owners courteous and effective, avoiding all misunderstandings. Supervisors and crew were very professional and friendly and they thoroughly cleaned the job site, side walk and street after completing the job.
It is a pleasure to recommend William Penn Roofing, based on quality of work, cost and work crew performance.
  
 
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   Joe E 
 
 
 
 Trustindex verifies that the original source of the review is Google. William Penn Roofing did great work on our new roof.  Thorough and accurate estimate and scheduled quickly.   Roof looks great and they were in and out (and cleaned up) in a day.   Whole team was a pleasure to work with.   Highly recommend.
  
 
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   Elyse Gerwick 
 
 
 
 Trustindex verifies that the original source of the review is Google. Really great experience the whole way through with this company. They are excellent with communication, returning calls/emails. Ashley got everything all setup. On the first visit, Kim was very thorough, explaining the whole process, and he had everything with him to be able to show us what we'd be buying (gutter size options, roof colors, and the vents). There was even a folder he left with me with literature and samples I could share with my husband. When the roofers came out they were polite, tidyand did an excellent job with cleanup. It's been 10 days and we have not found a single piece of roofing remnants. The gutters were installed the following day, we opted for 6 inch gutters and downspouts with the gutter guards and couldn't be happier. Again, very professional team and impeccable cleanup. I'd absolutely recommend going with this company for your project and hope to work with them again when we need future work on the house.
  
 
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   Patricia Kohlhepp 
 
 
 
 Trustindex verifies that the original source of the review is Google. William Penn Roofing came to give me a complete inspection of my roof. He explained in detail everything about the roofing from the attic area to the outside. Extremely helpful!

See the Work Before You Commit

Photos tell you more about a roofer than a warranty page does. Our gallery shows completed tear-offs, repairs, and exterior work across Lambertville and the surrounding river towns, with before and after shots of each job.

Complete Residential Roofing Solutions Built for Lambertville Homes

Downtown row houses bring party walls, steep pitches, and no margin for error on flashing, while newer township builds face open wind off the river. Our residential roofing services cover both, from a single flashing repair to a full replacement.

Our Proven Roofing Process From Inspection to Final Walkthrough

1. Free on-site inspection

A specialist walks the full roof, photographs everything, and pins down whether you need a repair or a replacement.

2. Written scope and transparent estimate

You get a digital estimate emailed to you with materials, labor, and scope broken out. No pressure to sign on the spot.

3. Materials, permits, and approvals

We help you select the system, then handle the permit filing and any city approvals before scheduling.

4. Scheduling and property protection

We book around weather windows, coordinate dumpster and material drops, and protect landscaping, siding, and outdoor features first.

5. Installation with one accountable lead

The same project lead oversees the crew start to finish, following manufacturer installation standards.

6. Cleanup, walkthrough, and warranty

Debris removal, magnetic nail sweeps, a final walk of the work with you, then warranty registration and documentation for your records.

Understand the Investment Before Work Begins

What a roof costs comes down to size, pitch, material, and what we find under the old shingles. Here is how to get a realistic picture before you commit.

Roofing Cost Calculator

Our roofing cost calculator gives you a ballpark in a couple of minutes based on roof size, material, and whether you need repair or replacement. On older homes where slate or a matched profile is required, treat it as a starting point we confirm on site.

Financing Options

Roof financing spreads the cost into monthly payments instead of one lump sum. That matters most on full replacements, slate and cedar work, or storm repairs that cannot wait for next year's budget.

Commercial and Flat Roofing Expertise for Lambertville Businesses

Downtown storefronts and mixed-use buildings mostly run low-slope systems that fail quietly until they leak into inventory. Our commercial roofing work covers repair, replacement, restoration, and maintenance across the river towns, including Frenchtown upstream.

High-Performance Roofing Systems Engineered for New Jersey Conditions

The right system depends on your roof design, budget, and what the neighborhood expects. We install across Hunterdon and Mercer counties, from riverfront period homes to newer construction near Princeton.

Asphalt Shingles

A practical choice for most pitched residential roofs, with strong value and a wide range of profiles and colors.

Metal Roofing

Standing seam and metal systems handle wind and heavy rain well, shed snow quickly, and last decades with little maintenance.

Cedar Roofing

Chosen for natural character and premium appearance, cedar suits period homes when it is properly ventilated and maintained.

Copper Roofing

A high-end option for accents, bays, and porch roofs, valued for longevity and the patina it develops over time.

Slate Roofing

Slate provides exceptional durability and long service life, making it a strong choice for high-end homes.

TPO Flat Roofing

TPO is an energy-efficient membrane designed for durable protection on flat and low-slope commercial roofs.

EPDM Rubber Roofing

EPDM offers flexible, waterproof protection suited for long-term performance on low-slope systems.

Modified Bitumen Roofing

Modified bitumen systems provide dependable, multi-layer protection for commercial flat roofing applications.

Exterior Improvements That Protect and Enhance Your Property

Roof work is often the right moment to fix the systems around it, especially on older homes where water has been finding its way in for years.

Why Lambertville Property Owners Choose William Penn Roofing & Exteriors

Plenty of regional roofers will drive out to Lambertville. Far fewer know how the local approval process runs, or how little margin the steep attached rooflines downtown leave on flashing detail. Here is what stands behind the work:

Straight Answers to the Roofing Questions Homeowners Ask Most

Do skylights or solar panels need historic district approval in Lambertville?

If they are visible from the street and your property sits in the district, expect them to go through review with the rest of the exterior work. Rear-facing installations are usually a much easier conversation.

My block floods. Does that change how you approach the roof?

The roof sits above the problem, but drainage does not. On low-lying properties we size gutters for heavy runoff and move discharge points well away from the foundation.

How do you handle dumpsters and staging on narrow Lambertville streets?

We plan placement before the crew arrives and coordinate with the city when a street-side drop is the only option. On attached homes we protect the neighbor’s property line too.

Is it worth repairing an original slate roof or replacing it?

Slate is often repairable long past the point most people assume, and a matched repair costs far less than a replacement. We will tell you when a slate roof is genuinely finished.

Why do older Lambertville homes get ice dams, and can a new roof stop them?

Heat escaping into the attic melts snow that refreezes at the eaves, which is common in older homes with retrofitted insulation. Correcting attic ventilation and adding ice and water shield during a replacement solves most of it.

Stop Small Leaks Before They Become Major Repairs

A roof problem never gets cheaper by waiting. A stain spreading across the ceiling, a drip in the attic, or shingles in the yard after a storm are all worth a look now rather than next spring.

Reach out for a free estimate and we will give you an honest read on what is happening and what your options cost, with no pressure and no scare tactics.

Serving Lambertville and Neighboring New Jersey and Pennsylvania Communities

We proudly serve Lambertville and surrounding communities throughout Hunterdon County and nearby Pennsylvania towns with dependable residential and commercial roofing services backed by experienced local crews.

Burlington County
Bordentown
Burlington
Cinnaminson
Evesham
Florence
Maple Shade
Medford
Moorestown
Mount Laurel
Willingboro
Camden County
Audubon
Camden
Cherry Hill
Collingswood
Gloucester Township
Haddon Heights
Haddonfield
Pennsauken
Voorhees
Winslow
Cape May County
Avalon
Cape May
Dennis Township
Lower Township
Middle Township
North Wildwood
Ocean City
Sea Isle City
Stone Harbor
Wildwood
Essex County
Belleville
Bloomfield
East Orange
Irvington
Livingston
Maplewood
Montclair
Newark
Short Hills
West Orange
Hunterdon County
Clinton
Flemington
Frenchtown
High Bridge
Lambertville
Lebanon
Raritan Township
Readington Township
Stockton
Tewksbury Township
Mercer County
East Windsor
Ewing
Hamilton Township
Hightstown
Hopewell
Lawrence Township
Pennington
Princeton
Robbinsville
Trenton
Somerset County
Bernardsville
Bound Brook
Bradley Gardens
Bridgewater
Franklin Township
Green Brook Township
Green Knoll
Hillsborough
Martinsville
Somerville
South Bound Brook
Warren Township

Roofing Contractors in Lambertville, New Jersey