East Bay's Premier Design-Build Specialist
Bespoke East Bay
Bathrooms. Engineered
to Last a Lifetime.
We blend luxury resort aesthetics with the rigorous structural engineering of the Paragon Standard — a flawless, stress-free design-build experience tailored for the East Bay's finest homes.
Call a Design Expert
(209) 502-5997
Private Consultation
Request Your Design & Structural Assessment
We do not deliver blind estimates. Every engagement begins with a comprehensive in-home consultation — no guesswork, no surprises.
Why ParagonCA
In the East Bay, a Beautiful Bathroom Is Expected.
A Structurally Flawless One Is Rare.
Don't hire a contractor who cuts corners behind the tile. Hire the expert who literally wrote the book on waterproofing methodology.
ParagonCA's founder, Antonio Topete Diaz, is the author of the Paragon Standard Remodeling Series — published guides documenting the exact failure patterns behind leaking showers, failed shower pans, and faulty waterproofing. Every project is held to the standard he documented. Not a marketing claim. The actual standard.
“We are not the lowest bid. We are the last contractor you will ever need to hire.”Meet the Team & Our Standard
True Luxury Design Is Only as Good as the Engineering Beneath It
The six failure patterns below are not rare edge cases. They are the predictable result of improper construction — and they are what we eliminate before a single finish material is selected.
Waterproofing Skipped or Compromised
A membrane applied without proper overlap, pre-sloped mortar, or sealed penetrations is not a system — it is a delay. Water moves through grout, around drains, and behind fixtures continuously. The question is only where it ends up.
Risk: Structural rot · Mold · Full rebuild
Tile Set on the Wrong Foundation
Tile adhered to standard drywall, improperly gapped backer board, or an unsupported mortar bed will crack and delaminate. No amount of regrouting addresses the underlying movement. The substrate must be correct before the first tile goes down.
Risk: Cracked tile · Delamination · Water intrusion
Penetrations Left Unsealed
Drains, supply lines, niches, and fixture backing are each a gap in the waterproofing envelope. When they are not sealed as part of the system, water finds them — and follows the path of least resistance into the framing and subfloor.
Risk: Hidden moisture · Subfloor damage · Mold
Drainage That Does Not Drain Completely
A shower floor with insufficient slope holds water after every use. Chronic standing water breaks down grout, saturates the substrate, and creates conditions for mold growth inside the wall cavity — none of which is visible from the outside.
Risk: Chronic moisture · Grout failure · Mold
Structural Work That Was Never Done
Grab bar blocking not installed in the framing. Subfloor not assessed before new tile adds weight. Tub deck not properly supported. These are not finish problems — they are structural decisions that determine whether the bathroom holds up for five years or twenty-five.
Risk: Safety hazards · Premature failure
The Patch That Bought Time
Recaulking over active moisture. Replacing surface tile without addressing what is underneath. These are not repairs — they are postponements. And the longer the underlying problem continues, the more expensive the eventual correct repair becomes.
Risk: Compounding damage · Higher future cost
Every ParagonCA project begins with a structural assessment that identifies these risks before scope is finalized — before a single tile is selected.
Request a Structural AssessmentThe Paragon Private Design & Structural Consultation
We do not deliver blind, rushed estimates. Our comprehensive in-home consultation is the foundation every project is built on.
We plan for perfection before a single line item is priced. Affluent homeowners deserve an expert who understands the full picture — not a contractor who shows up with a clipboard and a number.
Schedule Your Private ConsultationWe accept a limited number of projects each season to ensure every client receives our full attention.
Your Consultation Includes
Structural Layout Integrity Assessment
We evaluate the existing framing, substrate, and waterproofing envelope — not just what is visible on the surface.
Moisture-Vulnerability Diagnostic
We identify every active and latent moisture risk in your existing space before any scope is committed.
Conceptual Design Overview
We discuss layout, material direction, and finish strategy — aligned to how you actually live in the space.
Written Findings & Honest Scope
You receive a documented summary of what we found and exactly what it takes to do it correctly. No surprises after work begins.
Verified Client Results
Serving Discerning Homeowners Across the East Bay
Danville · Blackhawk · Walnut Creek · Lafayette · Orinda · Alamo · Pleasanton
“We had a shower that three contractors looked at and none could explain why it kept failing. ParagonCA found the source on the first visit — the liner had never been properly installed. They rebuilt it correctly and documented everything. Two years later, not a single issue.”
Sandra & Jim K.
Orinda, CA
Forensic Investigation & Full Rebuild
“I was skeptical about the premium pricing until I watched them work. The substrate preparation alone took longer than my previous contractor spent on the entire job. Now I understand why. This is what a bathroom remodel is supposed to look like.”
David R.
Danville, CA
Master Bathroom Reconstruction
“We had water damage behind the tile that our first contractor missed entirely. ParagonCA opened the wall, showed us exactly what had been happening for years, and fixed it properly. The finished bathroom is beautiful — but more importantly, it is built correctly.”
Margaret T.
Walnut Creek, CA
Water Damage Correction & Remodel
How We Work
A Process Built Around Getting It Right
01
Private Consultation
In-home structural assessment, moisture diagnostic, and conceptual design overview — before any scope is priced.
02
Written Scope
Detailed proposal: scope, materials, timeline, and pricing. No vague estimates. No mid-project surprises.
03
Correct Preparation
Full substrate preparation and waterproofing installed as a system — not rushed, not skipped.
04
Precision Build
Every phase executed to the Paragon Standard. Materials installed to spec. Nothing is cut short.
05
Documentation & Warranty
Phase-by-phase photography, written documentation package, and a warranty on all work performed.
Ready to Do It Right?
Stop Patching. Start Solving.
Whether you have a failing shower, hidden water damage, a botched remodel, or a bathroom that simply needs to be done right — we can help.
ParagonCA is not the right fit for every budget. We are the right fit for homeowners who understand that quality costs less in the long run.