G&S Construction specialists
G&S Construction specialists

G&S Construction specialists

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Hired 17 times

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4 employees

3 years in business

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Top pro status

Top Pros are among the highest-rated, most popular professionals on Thumbtack.

Jul - Dec

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Concrete location

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Customers rated this pro highly for responsiveness, work quality, and professionalism.

Great 4.7

15 reviews


Read reviews that mention:

Krissy A.

Concrete Installation

Jason was very quick to get back to us with questions. His team worked quickly and were very precise. I have recommended him to my brother in law. Highly recommended!
G&S Construction specialists's reply
Thank you Krissy! Were Happy your Happy!!!
May 14, 2020
Hillary D.

Brick or Stone Repair

I received a call back the same day that I had put in a request. He looked at the masonry work that needed to be done and gave a quote a day later.
G&S Construction specialists's reply
Thank you Hillary!
Nov 20, 2018
Bill n.

Concrete Installation

The team was extremely good,knowing exactly what needed to be done and was able to keep the worksite clean .very happy with the end results,
Oct 3, 2018
Thomas m.

Concrete Installation

We have a flat spot in the driveway. Water puddles towards the end of the driveway
Jun 1, 2020
John b.

Masonry Construction Services

Acting as GC on my own 10K sq. ft. home and after I set the forms, Jason Gahon of G&S and his sub-contractors poured 4400 sq. ft. (about the size of a full basketball court) of colored and stamped concrete for a drive and front walk; the pours spanned four days and took 8 concrete trucks; they also installed pavers and steps on one side and the front of this house. Unfortunately, I greatly regret hiring Jason, for the project was much too large and complex for him to complete to my satisfaction. Recently my building inspector failed (see photos 1 & 2 below) the two front steps Jason designed and installed for being over the maximum, allowed 8 inches. He also used two completely different colored mortars on it (see photo 3 below). Jason now refuses to correct the front steps unless I PREPAY him $2300. Some of the mistakes made on this job were beyond Jason’s control but most were not. I purchased and gifted to Jason the stamped concrete forms to use on this project. They were borderless forms that simply texture the concrete to look like natural stone. (example, see photo 4 below) and it is essential to imprint the forms on the concrete WITHOUT allowing the borders of the forms to leave their imprints also in the concrete for this absolutely ruins the effect of duplicating natural stone (see photo 5 below); the blue tape shows locations of the edges of forms improperly imbedded in the concrete. Unfortunately, neither Jason nor any of his subcontractors knew how to do this correctly and embedded form edges are visible everywhere, throughout the job. Also, since there were different crews on different days, my drive is a ‘hodgepodge” of radically different results from their varied and unsuccessful attempts to stamp the concrete. There is no continuity at all throughout my whole drive and walk even though they all used the same set of forms. Two independent and highly recommended (one by the Wisconsin Ready Mix Association) stamped concrete professionals upon seeing my drive said they had never seen anything ‘this poorly done’. One of these experts teaches stamped concrete techniques to contractors and he took pictures of my concrete to show his students actual examples of incorrect technique. If this wasn’t bad enough, the ready-mix company chosen by Jason neglected to tell either of us that the color I chose (LANNON STONE) was CHEMICALLY IMPOSSIBLE to achieve without substituting obscenely expensive, white Portland cement for the conventional, grey-toned cement used in everyday applications. Instead of the expected (as shown repeatedly in the concrete-color company’s beautiful booklet) creamy, yellow tone, my concrete was GREEN. A photo below (6) shows a core sample taken from one of my 8 truck-loads. Left outside in the elements over the winter, the green has faded somewhat. Hoping the green cast would fade and bleach out over time, I prohibited Jason from applying the final, darker antique color and then sealing the colors in with a solvent based sealer which penetrates the porous concrete. We tried the sealer on a corner of the drive and sure enough, it turned a lovely DARK GREEN! I am overjoyed that I resisted Jason’s repeated attempts to apply dark antique, for this would have emphasized the unwanted, stamped form edges in the concrete, and to seal the concrete, for this would have locked in the ugly green color; the drive is actually losing the green cast and soon I may have a gray-white drive like all of my neighbors; not the Lannon Stone color I paid for, but at least it is not green. Against advice from my legal counsel, I did not withhold any amount for such poor, stamped concrete results, backed-up by expert witnesses; however, I did withhold around 4600 from my final payment for this is what Jason valued the cleaning and sealing of a drive my size. This is the ‘rub’ for he is upset and feels I cheated him by doing this. The $2300 he wants before he corrects his mistakes on my front stairs is what he feels I owe him for he did pressure wash my drive, in order to try and remove the red chalk marks left in the concrete to guide the saw cuts I designed. (see Photo 7 below) I feel this is ridiculous for he would have had to remove the red chalk marks in order to call the job finished whether it was stamped concrete or just a conventional concrete drive with many saw cuts. Well, there are about 1700 linear feet (1/3 of a mile) of saw cuts and the bright red chalk marks were put on too densely and most did not come out with Jason’s pressure washing. It took over 2 days of scrubbing with myself and my two laborers on our hands and knees before we got all the red out. I feel I do not owe Jason any money. My job site is open to anyone who wants to view the stamped concrete job done by Jason Gahon of G&S. Contact me through Thumbtack and I will send the address. Sincerely, John Birck MAcc, MBA.
May 20, 2020
Background Check

Jason Gahan


  • What should the customer know about your pricing (e.g., discounts, fees)?

    I offer fair and competitive pricing for quality work.

  • What is your typical process for working with a new customer?

    meeting them in person to get a good understanding of what they are looking for.

  • What education and/or training do you have that relates to your work?

    I have 20+ years of experience in a variety of work.

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