Several months ago I actually contacted a few fabricators about enlarging the cutout for my sink, and all of them refused to do it. Said I needed a new slab of granite if I wanted a new sink. So am I just asking the wrong folks? Should it be reasonably easy to find somebody to enlarge a granite cutout? For what it's worth, I am in the Raleigh-Durham, NC area.

Check with your cooktop dealer, if you bought it locally. They might have a local fabricator contact for you.

You have problems in both dimensions. Your cutout is both too wide (which you can't fix) and too shallow (which you can) for most induction cooktops. The Frigidaire Gallery Series FGIC3666TB ($943) will fit if you are able to increase the depth of the cutout to somewhere between 19-1/8" and 20-1/2". Also at Home Depot.

I did an Internet search and found that the cutout can be enlarged with an angle grinder.

Yep, an angle grinder with a diamond blade. I'm familiar with the process and could probably do it myself without destroying anything, but I'd happily pay somebody else to do it. I guess if I end up having to do it myself, I could go ahead and do my sink cutout while I'm at it.

I wouldn't do a cutout myself for an undermount sink as the edge must precisely follow the shape of the sink. For a drop-in sink it would probably be okay if the sink allowed some play in the cutout dimensions (because your cuts aren't going to be perfect). Fortunately, that Frigidaire cooktop does.

If I do the sink myself it will definitely be a drop in. Not only would the cutout need to be too precise for an undermount, but I'd also have to polish the edges of my cut. No thanks. hah

I am a fabricator. Enlarging a cooktop cutout is not a big deal. Find a cooktop that works for you that's larger than the existing one. Note you need to check the size of the cabinet so you don't pick a cooktop bigger than the opening in the cabinetry. Enlarging a sink cutout is far more work if the sink is an undermount as the cutout has to be polished. Most shops wouldn't do it on site; you 'd need a restoration specialist.

Page 6 of the increase the Frigidaire cooktop installation instructons says there's an installation kit for granite countertops.

Interesting thread as this is my exact problem as well. Current Viking professional gas cooktop with cut out of 34.5 x 18.5. Considering the BlueStar induction cooktop that lists recommended cut out of 34 x 18. Will this be ok being 0.5" too large in each dimension? The BlueStar spec sheet does not give a variance on cut out dimensions.

It depends upon the width of the appliance flange. Page 21 of these Blue Star induction installation instructions specify a 35" x 20 1/2" cutout, so you'd be in luck. A rail saw with a diamond blade and vacuum and you'll have a relatively dust-free project.

You must have been looking at page 4. The appliance flange looks plenty large enough to easily cover the larger-than-specified cutout.

Thank you for that I realize that the cooktop will easily cover the cut out i was concerned more about supporting the weight of the cooktop with pots and pans i heard from someone else thah the cut out needs to be more precise for induction tops

For instance, Viking ranges will give a cutout width of 34 3/8 to 35 1/2” but i don't see a range for the Bluestar cuitout it only says 34” width Just wanted to make sure 34.5” wasnt too wide.

Since it's covered anyway, you could have the material epoxied back on. It would be structural, but silly.

Ok good to know theres an option in case Bluestar says we need the cutout smaller Thank yiu so much for your answers!