We understand
Renovating a Bathroom or Shower?
"Can't I just pick one up at the tile store?"
✓ If It Fits, Yes.
Stock comes in limited sizes and a handful of colors. If none of those work for your bathroom, send us your measurements and we'll make the parts.
See the parts we make"Who's doing what on a job like this?"
✓ We Do the Slab Work.
We fabricate the pieces: bench top, shower curb, threshold, niche, jambs. Installing them is your tile setter's job.
Talk to the shop"Can I order just one piece?"
✓ No Job Too Small.
Every job is a job to us. A threshold or a shelf takes a fraction of a slab, and a lot of times that's what our remnants are for.
How It Works
Shower Parts Fabrication, Start to Finish
Small piece, same steps. Nothing here gets a shortcut.
Visit & Select
We Handle Everything
Enjoy Your New Shower
Materials
Best Shower Threshold, Curb, Jamb, Niche and Bench Materials
Marble
The classic threshold material, and the one most homeowners picture. Comes honed or polished, and that choice matters more in a shower than anywhere else.
Granite
Dense and hard. A shower curb takes a foot on it every day and shrugs that off.
Quartz
Engineered slabs, non-porous, never needs sealing. Color runs consistent, so a bench top matches the vanity exactly.
Quartzite
Natural stone with the marble look and real hardness behind it. Handles daily water without much thought.
Soapstone
Naturally non-porous, so sealing never enters the picture. It darkens with time, and in a shower it does that evenly.
Porcelain
Completely non-porous and unbothered by water. Large format slabs mean a tall jamb comes out of one piece.
Not sure yet? That's normal. Come in and we'll narrow it down together.
Thresholds
Shower Curbs
Door Jambs
Shower Niches
Wall Caps
Bench and Seat Tops
Why Choose granite guy
Your Shower Parts Fabricator
One Team, One Facility, Start to Finish
Showroom, slab warehouse, and fabrication shop, all in one building and run by one team.
A Shop Built for Precision
CNC, waterjet, and digital templating, the right tool for every cut. That's how your parts come out accurate.
Hand-Pick the Exact Slab You'll Get
Walk our indoor warehouse and choose the actual slab for your shower parts, in steady light any month of the year.
Slabs for Your Bathroom Parts, In Stock in Southborough
The Slab Concierge
Can't Find Your Slab? We'll Find It.
We keep a wide selection of slabs in Southborough, but your options go well beyond the warehouse. If we don't have the material you want, we send you to our partner slab galleries and stay with you the whole way, from pick to fabrication.
You hand-pick your own slab, and we handle the inspection, transport, and fabrication. One point of contact, start to finish.
The Slab Concierge: You pick it; we bring it to life.
Fill out the form and access 34+ slab galleries across MA, NY, NJ & CT, in your email.
What Our Customers Say
Bathroom Installations We're Proud Of
"The Countertop, Backsplash, threshold, wall cap and shower bench for our renovated bathroom came out perfectly."
— Beth DaniellGoogle Review
"They have done quartz counter tops for vanities, an undermount tub deck, and shower thresholds."
— Sue RamseyGoogle Review
"The granite guy fabricated a bathroom vanity counter top with backsplash and shower curb pieces."
— Michael DeMicheleGoogle Review
Don't take our word for it — See what our customers are saying.
Timing
Your Shower Parts Are Needed Before Your Countertops
Tile and flooring finish first, cabinets go in on top of the floor, and countertops come last. But your niches, benches, and jambs come off the same slab as your countertops, and your tile setter needs them back at the tile stage. That means the material decision lands months before the counters do.
Just updating one shower?
In the middle of a bathroom remodel?
Custom build with more than one bathroom?
Before you visit
Make the Most of Your Visit
Everyone's welcome, whether you're ready to choose or just gathering ideas, no pressure.
If you've already got the project in mind, a few things make the visit more useful.
Your measurements
Whatever you're matching to
How you'll use it
Don't have all of this? No problem. Just come in and we'll figure it out together.
What We Do
We Don't Stop at the Countertop
Pricing
How Much Do Shower Parts Cost?
Pricing matters. It's the first question everybody asks, and we get it.
But there's no price list in this business. Two suppliers can charge different prices for the same slab, and the work you want done changes the rest of it.
On a small part, square footage isn't what you're paying for. A threshold is a couple of square feet with finished edge running its whole length, and that edge is the work. Same material as a countertop, same shop, same machines. Different ratio.
We work with every supplier to find the best value, and we keep remnants from bigger jobs. A threshold or a shelf often comes straight off one.
Our quotes spell it out line by line: material, fabrication, edges, and whatever else the job adds. You see exactly what you're paying for.

About Granite Guy
Your Shower Parts Fabricator in Southborough, MA
Granite Guy is a full-service fabrication shop in Southborough: showroom, indoor slab warehouse, and fabrication floor, all in one building. From the slab you pick to the finished edge, one team handles it in-house at our countertop store on Route 9. Countertop store.
"I'd rather walk you through a decision than push you to one. The more you understand before we start the job, the fewer surprises later. That's how I work, and it's how I train my crew."
Maintenance
Living With Your New Bathroom
The full guides:
Marble care → Granite care → Quartz care → Quartzite care →