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The 10 Best Foundation Repair Services in Philadelphia (2026)
Philadelphia homeowners face a mix of older rowhouses, stone and masonry foundations, and seasonal wet weather that can expose foundation issues. This list is built from Google review data and updated for 2026 using a Bayesian-weighted score (the average rating adjusted by review count) so businesses with lots of feedback aren’t unfairly compared to newer listings. We focused on verified Google ratings to present a practical, data-driven guide for anyone researching foundation repair and waterproofing options across the Philadelphia area.
This ranking is computed from Google reviews (our method). Listings marked Partner are paid advertising spots: they sit alongside the ranking without changing its order.
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Jamison Basement Waterproofing
Jamison Basement Waterproofing tops our list thanks to a perfect 5.0 Google rating combined with a large review base of 1,827, which gives it strong weight in our Bayesian scoring method. The company is categorized as a Waterproofing service and is located in Oreland, PA, helping it stand out by review volume as well as rating. Those two factors — rating and substantial review count — are why it ranks first in this 2026 update.
The full ranking
Over the Top Waterproofing
Over the Top Waterproofing records a 5.0 rating across 188 Google reviews and appears as a Waterproofing service in Philadelphia (ZIP 19152). That combination of a perfect score and several hundred reviews places it near the top of our list.
188 reviews
Philadelphia Foundation Repair & Waterproofing
Philadelphia Foundation Repair & Waterproofing shows a 5.0 rating with 61 Google reviews and is categorized as a Waterproofing service in Philadelphia (ZIP 19106). Its local presence in the city contributes to its ranking.
61 reviews
Basement Waterproofing Scientists
Basement Waterproofing Scientists holds a 5.0 rating from 53 Google reviews and is listed as a Waterproofing service in Radnor, PA. The listing’s review count and perfect score help it rank highly in our evaluation.
53 reviews
Total Basement Waterproofing & Foundation Repair Philadelphia
Total Basement Waterproofing & Foundation Repair Philadelphia carries a 5.0 rating based on 43 Google reviews and is categorized as a Waterproofing service in Philadelphia (ZIP 19103). Its name indicates focus on both basement waterproofing and foundation repair.
43 reviews
Dry Max Basement Waterproofing
Dry Max Basement Waterproofing earns a 5.0 Google rating from 37 reviews and is listed as a Waterproofing service in Philadelphia (ZIP 19152). Its compact review total still supports a strong Bayesian score.
37 reviews
Queen Foundation Repair
Queen Foundation Repair records a 5.0 rating across 30 Google reviews and is categorized as a Waterproofing service; no address was provided in the listing data. Its perfect score is noted despite a more modest review count.
30 reviews
MBB Basement Waterproofing
MBB Basement Waterproofing has a 5.0 rating from 28 Google reviews and is listed as a Waterproofing service with no address shown in the available data. The listing’s high score helps it place on this local list.
28 reviews
NJ Foundation Repair & Waterproofing
NJ Foundation Repair & Waterproofing posts a 5.0 rating with 24 Google reviews and is categorized as a Concrete contractor in Trenton, NJ. Though based outside Philadelphia proper, its review profile earned it a spot in this ranking.
24 reviews
Quality 1st Basement Systems
Quality 1st Basement Systems holds a 4.9 Google rating from 384 reviews and is listed as a Waterproofing service in Elkton, MD. Its large review total combined with a slightly lower average keeps it competitive on the list.
384 reviews
Frequently asked questions
How should I choose a foundation repair contractor?
Start with documented credentials: check for relevant licenses, proof of insurance, and clear written estimates. Also look for recent Google reviews, ask for references, and request a written scope of work and warranty before signing a contract.
What typically affects the cost of foundation repair?
Costs depend on the type and extent of damage, the repair method required, site access, and whether structural or waterproofing work is needed. Get multiple written bids that break down labor, materials, permits, and any warranty or follow-up inspections.
What should I check before hiring a foundation or waterproofing company?
Verify insurance and licensing, read recent customer reviews, and review before-and-after photos of similar jobs. Confirm who will pull permits if needed, obtain a detailed contract, and ask about timelines and post-repair inspections.
How was this ranking of foundation repair services compiled?
The list is built from Google review data and updated for 2026 using a Bayesian-weighted score, which adjusts the average rating by the number of reviews so businesses with many reviews are appropriately represented. We did not factor in price or unverified claims — the ranking reflects publicly available Google ratings and counts.