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JMK Construction Wny

Waterproofing Company in Buffalo, New York.

JMK Construction Wny is a waterproofing contractor based in Buffalo, NY. Its Fully licensed and insured (as stated by the company, no number published) is reported by the company and not yet verified, so check it with Self-reported on company website before work starts.

4.9on Google · 264 reviews12 years in business
  • TenBestFind Reviewed
  • Top 10 Winner
  • iWhat do these badges mean?
    TenBestFind Reviewed
    Our editorial team has researched and reviewed this business.
    Verified Business
    Key business information or ownership has been verified against a primary source.
    Top 10 Winner
    The company currently appears in at least one active TenBestFind Top 10 ranking.
    Featured Partner
    A paid commercial relationship with TenBestFind. It never earns or influences a ranking position. This company holds no such relationship.

    Advertising & Sponsorship Disclosure

Quick Overview

iHow this is made

This summary is generated from the verified data on this profile: services, service area, credentials, warranty terms and the company's Google review record. It is reviewed by an editor before publishing and refreshed whenever the underlying data changes. Nothing here is asserted that is not stated elsewhere on this page.

Editorial Standards

JMK Construction Wny is a family owned concrete and construction company at 440 Northwood Dr in Buffalo that has worked in Western New York since 2014. Concrete is where the business started, and basement waterproofing sits beside it as a main service: sump pump installs, Britewall waterproof wall panels and full interior drain tile that the company says is backed by a lifetime warranty. Reviewers describe drain tile in basements and yards, a new sump pump, and a sewer line replacement, with owner John explaining repair options without pushing extras. The company holds 4.9 from 263 Google reviews, read October 20, 2026. It also pours driveways and patios, builds decks and finishes basements, so one crew can handle the dry-out and the rebuild afterward.

  • Best for basement drain tile and sump pumps from a concrete contractor
  • Opened in 2014 and family owned, with owner John in the field for 20+ years
  • The website gives little written detail on warranty terms, certifications or service areas

Company Facts

JMK Construction Wny at a Glance

By the numbers

Google rating
4.9out of 5
Customer reviews
264on Google
In business
12years

Rating and review count pulled from Google on October 28, 2026. Years counted from 2014.

The work

Best for
Basement drain tile and sump pumps from a concrete contractor
Primary service
Waterproofing

Where

Headquarters
Buffalo, NY
Service area
Buffalo
Emergency service
Not advertised

Money and guarantees

Free estimates
Yes
Financing
Not advertised
Workmanship warranty
Full interior drain tile is backed by a lifetime warranty, per the company website. Transferability and written terms are not stated.

Credentials

Fully licensed and insured (as stated by the company, no number published)
Fully licensed and insured (as stated by the company, no number published) (reported by the company, not verified)

Editorial Review

Our Take on JMK Construction Wny

JMK Construction Wny earns its place on the strength of 263 Google reviews at 4.9 and an owner who reviewers say lays out options without upselling. Its concrete background suits foundation and floor problems well. The thin website and the absence of a named waterproofing certification are the trade offs.

Best forBasement drain tile and sump pumps from a concrete contractor

What We Like

  • Opened in 2014 and family owned, with owner John in the field for 20+ years
  • Offers sump pump installs, Britewall waterproof wall panels and full interior drain tile
  • Full interior drain tile is backed by a lifetime warranty, per its website
  • Reviewers say the crew cleans up daily and the owner presents several repair options
  • Can also pour concrete, finish basements and hang drywall after the dry-out

Things to Consider

  • The website gives little written detail on warranty terms, certifications or service areas
  • Google lists it as a general contractor, and no waterproofing manufacturer certification is stated
  • Not open Sundays, and no 24 hour emergency service is advertised

Customer Ratings

Google Reviews for JMK Construction Wny

Customer ratings shown here come from Google. They are separate from our editorial review above.

Google rating

4.9

Based on 264 Google reviews

Review data updated October 28, 2026

View on Google Maps

Rating Distribution

  • 5 stars98%
  • 3 stars0%
  • 1 star2%
iAbout this distribution

The distribution reflects the 264 Google reviews available when this profile's review data was last refreshed on October 28, 2026. Ratings and counts change continuously on Google, so figures here may lag the live profile slightly. We publish only the values returned by the source, never estimates for missing bands.

Editorial Standards

Recent Google Reviews

  • Grace5.0

    Excellent experience working with this home improvement company! John and his team replaced our front walkway and front stoop with new exposed aggregate concrete in a timely and professional manner! It looks stunning, truly exceeding my expectations! Highly recommend them!

    October 2026Google
  • D D5.0

    My mother had work done at her house last week. She needed her foundation sealed. The crew of Adam and Doug were professional and courteous. They explained everything to my Mom and myself. My mom has used JMK in the past, and is very happy with the service they provide.

    September 2026Google
  • Angel Bre5.0

    The team at JMK has shown up for us time and again. Glad that we took a chance on the truck we saw in the TOPS parking lot! New front windows and porch door installed. Had shower redone (by someone else-shame on us) and when John came to quote other jobs he reassured us that the job was subpar on shower install. We were able to get it completely redone by the original company during warranty period with his help. John is very understanding and when I mentioned the updates are mainly for safety, he jumped to the same page with our need of a new back porch. Thankful for them! Always has suggestions for work they dont directly do, and the referred people show up! Excited to see once everything else is completed...Will follow up with photos when done.

    September 2026Google
  • Marian Rizzo5.0

    They repaired my front cement stairs. Timely, efficient , neat. Highly recommend. I wouldn't think twice about calling for future projects

    September 2026Google
  • Joe5.0

    We hired JMK to rip out an old deck and replace it with a stamped concrete patio. From the very beginning John and his crews were excellent. They did high quality work, showed up as promised each and every time which is much appreciated when so many contractors nowadays fail to follow through, or just blow you off altogether. They even offered to return when we were ready to hang a porch swing which we just did yesterday. I highly recommend them.

    September 2026Google
  • Mathias5.0

    I’ve had water in my basement ever since I bought my house. Their crew was here for 2 days replacing the fresh water sewer line outside my house and installing a new sub pump and with the heavy rains we have been having my basement is dry for the first time. Great crew highly recommended. Crew was on time, worked efficiently and never saw them even take a break. Even did a great job on cleanup after they were finished.

    September 2026Google

View more Google reviews

Ranked#5of 5 waterproofing companies in Buffalo, NYre-checked October 2026

Editorial Ranking

Why JMK Construction Wny Made Our Top 5

It holds position 5 in 5 Best Waterproofing Companies in Buffalo, NY (2026).

See the Full Buffalo RankingPositions cannot be bought

Areas Served

Based in Buffalo, NY.

iAbout service coverage

Coverage is as the business describes it, cross-checked against where its recent documented work is. A company will often travel beyond the areas listed here for a large job and decline a small one at the same distance, so confirm your address before scheduling.

Editorial Standards

Company Background

About JMK Construction Wny

JMK Construction Wny begins with concrete, which is why its crew understands where water gets into a Buffalo basement: cracked slabs, failed footings, settled walls and soil that never drains away from the house. The family owned company has operated from 440 Northwood Dr since 2014, led by owner John, who has worked in the field for more than 20 years. The website describes the business as fully licensed and insured and lists basement waterproofing among its main services, alongside concrete, yard drainage and home improvement.

On the waterproofing side, the site names sump pump installation, Britewall waterproof wall panels and full interior drain tile backed by a lifetime warranty. Reviews fill in the detail. Clinton hired JMK to replace the drain tile in his basement and install I-beams, and chose the company over Frank's Basement Systems because John laid out several repair options with honest pros and cons and did not push extra work. He also credits Adam and the crew for a tidy 1.5 weeks of work. Another homeowner had drain tile and bubblers put in the basement and both yards, with Adam's crew cleaning up each night and Jeff hanging the drywall afterward. A third had water in the basement since buying the house, and a two day job replacing the fresh water line and adding a new sump pump kept it dry through heavy rain.

JMK says it serves Western New York, and its Google listing places it in the Buffalo and Tonawanda area. The company has also done decks, porches, railings and finished basements, which helps when waterproofing leads to a rebuild.

JMK has 4.9 from 263 Google reviews, read October 20, 2026. The reviews we read were all positive, so the fair concern is the website: it is short on written detail about warranty terms, certifications and service areas, and Google classes the company as a general contractor rather than a waterproofing specialist.

It suits homeowners who want interior drain tile or a sump pump from a contractor with concrete skills and a straight talking owner. It suits less well anyone who needs a manufacturer certified waterproofing system or a written warranty before the first call. New York has no statewide waterproofing or home improvement contractor licence, so ask whether the company holds an Erie County home improvement licence and request the number, confirm insurance and workers compensation, and check City of Buffalo permit rules with the Division of Permit and Inspection Services. Ask for the warranty in writing and whether it transfers.

iWhere this information comes from

Company history, ownership and capability details on this page are provided by the business and reviewed by our editors for plausibility and consistency. They are not the same as the credentials block, where each item carries its own verification status and source.

Editorial Standards

Credentials

  • Fully licensed and insured (as stated by the company, no number published)Self-reported on company websiteReported
iWhat verified means here

Verified means we checked the credential against the authority that issues it and recorded the date. Reported means the business told us and we could not independently confirm it. We publish both, labelled, rather than dropping what we could not check.

Editorial Standards

Other Sources

Reputation by Source

We show each source separately rather than blending them into a single score, because they measure different things.

  • Google

    4.9/ 5

    264 customer reviews

  • TenBestFind

    Editorially reviewed

    Ranked #5 in Buffalo waterproofing, October 2026

Pricing

Company Pricing & Estimates

What this company publishes about its own pricing.

Free estimates
Yes
Workmanship warranty
Full interior drain tile is backed by a lifetime warranty, per the company website. Transferability and written terms are not stated.

Gallery

Project Photos

Business-submitted, reviewed by our editors

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JMK Construction Wny FAQs

  • Is JMK Construction Wny licensed and insured to waterproof basements in Buffalo?

    JMK Construction Wny describes itself as fully licensed and insured on its website, but it does not publish a licence number. New York State has no statewide waterproofing or home improvement contractor licence, so ask whether the company holds an Erie County home improvement licence and request the number. Also ask for proof of insurance and workers compensation, and check City of Buffalo permit requirements with the Division of Permit and Inspection Services.

  • What are JMK Construction Wny's hours, and does it do emergency basement work?

    JMK Construction Wny is open Monday to Saturday from 7:00 AM to 5:00 PM and closed on Sunday, according to its Google listing. Its website does not advertise 24 hour emergency service, so call (716) 908-4830 during business hours and ask how quickly a crew can respond to active flooding.

  • Does JMK Construction Wny offer a warranty, free estimates and financing?

    Yes to the first two. The company website says full interior drain tile is backed by a lifetime warranty and invites homeowners to call for a free estimate. Financing is not mentioned, and the site does not say whether the warranty transfers to a new owner, so get the terms in writing. The company says it serves Western New York, including Buffalo and Tonawanda.

  • Is JMK Construction Wny licensed and insured?

    We checked 0 of 1 credentials against the issuing authority. Verified items carry the date we checked; reported items are what the business told us and we could not independently confirm.

  • What areas does JMK Construction Wny serve?

    Buffalo. Coverage is as the business describes it, cross-checked against where its recent documented work is. Confirm your address before scheduling, particularly at the edge of a service area.

  • Does JMK Construction Wny offer emergency service?

    Emergency availability is not listed for this company. If you need an urgent call-out, check the ranking for companies that do list it.

  • What warranty do they offer?

    Full interior drain tile is backed by a lifetime warranty, per the company website. Transferability and written terms are not stated.. There are usually two warranties on a job: the manufacturer covers materials, the contractor covers workmanship. Get both in writing and check whether the workmanship coverage transfers if you sell.

  • How was this profile built?

    Credentials come from issuing authorities, ratings from the company's Google Business Profile with the date we read them, and the editorial take from our own review of estimates, warranty documents and public feedback. Anything the business told us is labelled as reported.

  • Can a business pay to improve its profile?

    A business can subscribe to manage its own listing details, and it can buy a labelled sponsored placement. Neither changes a ranking position or the editorial assessment on this page.

Is Something Incorrect?

Business information changes. Tell us about an address, phone, website, service area, credential or ownership change, or let us know if this company has closed.

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How We Rank

About This Business Profile

Last reviewed
October 2026
Profile last updated
November 11, 2026
Google review data updated
October 28, 2026
Sources checked
Issuing authorities, Google Business Profile, Company website
Could not verify
Fully licensed and insured (as stated by the company, no number published) (reported only)
Sponsorship status
No commercial relationship
JMK Construction Wny4.9 on Google · Buffalo, NYVisit Website