Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Tremron Home Additions & ADU: The San Jose Owner’s Guide
Home additions and ADU construction in San Jose typically run $53,100 to $153,400 depending on square footage, site prep, and finish level, and a properly scoped project is usually completed within 4 to 9 months once permits clear. If you have a Tremron paver product tied into your addition or ADU, what most people actually call about is not a failed “part” in the mechanical sense – it’s a failed detail: a settling paver base under a new doorway, a retaining edge that shifted after the first winter rains, or a hardscape transition that was never flashed correctly where the new slab meets the old house. Bradford Remodeling Co San Jose handles both sides of that job: the structural addition or ADU itself, and the Tremron hardscape details that make it hold up in San Jose’s clay-heavy, wet-winter-dry-summer soil cycle.
We’re an independent general contractor, not a Tremron dealer or affiliate. What that means for you is we’re not married to one product line, and when we spec Tremron pavers, retaining blocks, or wall systems, we’re doing it because the numbers work for your specific site, not because a distributor told us to push it.
Key Takeaways:
- Full home addition or ADU in San Jose: $53,100 – $153,400, written price before work starts
- Tremron hardscape details usually fail at transitions: where paver meets slab, where retaining wall meets foundation, where drainage wasn’t accounted for
- We pull permits, manage inspections, and document every scope item in writing
- All completed work carries the 365-Day Done Right Promise
- Call (669) 272-2637 for a free estimate on your addition, ADU, or the hardscape that ties it together
Which Tremron Models This Applies To
Tremron manufactures a wide range of concrete pavers, retaining wall blocks, and segmental wall systems, and the compatibility question on a home addition or ADU in San Jose is more about the application than the model number. The most common Tremron products we work with on additions and ADUs are their Holland Stone and Olde Towne paver lines for walkways and patios, and their retaining wall block systems for grade changes where a new ADU sits lower than the main house. What matters more than the paver name is the base spec: for any pedestrian hardscape tied to a new structure, we spec a minimum 4-inch compacted Class II aggregate base with a 1-inch bedding sand layer, and in San Jose’s clay soil, we recommend geotextile fabric under the base. Skip the fabric and you will see pavers sink within two to three wet seasons.
One gotcha we see regularly on San Jose ADU jobs: the homeowner or a previous contractor matched the paver color to the house, but nobody checked batch consistency. Tremron runs color through their paver lines in different batches, and if you need to extend an existing patio to meet a new ADU door, the new pavers will not match the old ones exactly, even with the same color name. The fix is either to pull pavers from a less visible area of the property and blend them into the new section, or to design the new hardscape with a deliberate border course so the color shift reads as intentional, not sloppy.
For segmental retaining walls, Tremron’s block systems come in different face finishes and structural capacities. A 3-foot gravity wall is a different animal than a 6-foot wall that needs geogrid reinforcement and an engineered setback. If you’re building an ADU on a sloped San Jose lot, the retaining wall is part of the structural package, and that means an engineer’s stamp, not a guess on block size.
Styles & brands we work with
Signs Your Tremron Home Additions & ADU Hardscape Is Failing
- Settling or sunken pavers near the new foundation. This usually means the base was never properly compacted or the fabric was skipped. In San Jose’s adobe clay, water gets under the pavers, the clay expands and contracts, and the base loses its bearing capacity. You’ll see a dip forming within the first two winters.
- Water pooling against the addition’s stem wall or the ADU’s sill plate. Hardscape should slope away from any structure at a minimum 1/4 inch per foot. If pavers slope toward the house, you’re feeding water into the foundation, which leads to efflorescence, framing rot, and in bad cases, slab movement.
- Cracks running through the paver field in a straight line. This is typically a failed base seam or a utility trench that was backfilled without proper compaction. A straight crack means something below the pavers moved, and the pavers just followed it.
- Separation at the transition where pavers meet the new concrete slab. Concrete and pavers expand and contract at different rates. Without a proper expansion joint or a flexible transition detail, the pavers will push against the slab, pop, and create a trip hazard at the door.
- Retaining wall blocks leaning or bulging after a wet season. Gravity walls lean when drainage behind the wall fails. Water builds up, hydrostatic pressure pushes the wall forward, and the blocks shift. On an ADU built into a slope, a leaning wall is a structural warning, not just a cosmetic issue.
Replacement Cost & What’s Included
For Tremron hardscape replacement or repair tied to a home addition or ADU in San Jose, paver patio installation runs $4,130 to $12,980, and a new paver driveway is $8,260 to $21,240. The full home addition itself runs $53,100 to $153,400, while ADU construction is $106,200 to $259,600. What drives the range is not mystery pricing: it’s square footage, the condition of the existing pad or foundation, soil stability on your specific lot, the finish level you specify, and whether the job needs an engineered retaining wall or drainage remediation before any aesthetic work starts.
Every Bradford Remodeling job gets a written line-item price before a single tool comes out. That price includes the materials, labor, permits where required, site protection, and job-site cleanup. No number moves at the door. If the scope changes because you change your mind, we write a change order and you sign it before we proceed. All completed work carries our 365-Day Done Right Promise: if it fails within one year, we return and correct it at no charge. That covers paver settlement, drainage failures we installed, or any workmanship defect we own.
See the difference
Before
After
Before
After
Before
AfterHow We Build a Tremron-Adjacent Addition or ADU
On a home addition or ADU project, the Tremron product is rarely the headline: the sequence is what matters. We start with demolition and site prep, including root removal and grade correction, because San Jose lots with mature trees have root structures that will lift pavers and crack slabs if they’re left in place. We then pour footings and foundation per the approved structural plans, frame the addition or ADU, and run rough-in for plumbing, electrical, and HVAC before any drywall goes up. The hardscape comes last: compacted base, edge restraint, paver field, and a proper drainage detail that moves water away from the foundation. The edge restraint is a small piece of the material bill, but it’s where most hardscape failures start, because a paver field without a solid edge will spread under load.
We install Tremron products alongside documented brands like Belgard and Unilock when the spec calls for it, and we also work with KraftMaid, Cambria, and Silestone on the interior side when your addition includes a kitchen or bath. The point is traceability: every material has a manufacturer spec and a warranty that stands behind our own guarantee.
DIY or Call Us?
If you have a small paver settlement issue, say a 2-foot by 3-foot dip in a walkway, you can safely check whether the base sand has washed out and whether the edge restraint is still intact. But pulling up a whole paver field, recompacting the base, and reinstalling without knowing what caused the failure in the first place is how you spend a weekend building a problem that will return next winter. On any hardscape tied to a foundation or a retaining wall, the stakes are higher: a retaining wall over 3 feet in San Jose requires an engineered design and a permit, and a paver surface that slopes toward your ADU is actively damaging the structure. That is not a weekend project.
For anything involving foundation drainage, structural retaining walls, or hardscape transitions tied to a new addition, call (669) 272-2637. We’ll come out, look at what’s actually happening, and give you a written price. Straight number, written scope, done when we said done.
FAQs
Tremron pavers themselves typically last 25 to 30 years, but in San Jose the base under them often fails in 10 to 15 years if the original install was done on clay without proper compaction and aggregate depth. The paver surface is rarely the thing that fails; the supporting base is. Call (669) 272-2637 and we’ll evaluate your base before we talk about replacing pavers.
Yes, in most cases a localized settlement can be corrected by pulling up the affected section, recompacting or replacing the base material, and reinstalling the same pavers, provided the pavers themselves are intact. If the problem is a failed base across the entire field, spot repair buys you time but not a fix. We’ll tell you which one you’re looking at after we open up a section and check what’s underneath.
An ADU in San Jose typically runs 5 to 9 months from permit approval to final inspection, and a home addition runs 4 to 8 months depending on size and finish level. San Jose’s permitting and inspection schedule has a real effect on timeline, which we account for in the written project schedule. Call (669) 272-2637 for a realistic timeline on your specific job.
We order Tremron pavers per job to match your existing field as closely as possible and to ensure the batch you receive is consistent across the entire install. We do keep base materials, edge restraint, and common drainage components stocked for repair work, so smaller hardscape corrections can often be completed without a long material lead. For a full addition or ADU, we place material orders against the written scope at contract signing.
No. The price you sign is the price we build to, unless you change the scope. If we find a condition under the surface that no one could have reasonably known about, like an undocumented sewer line or a buried root mass, we write a change order, you approve it, and only then do we proceed. No numbers move at the door. That commitment is part of The Garrison Standard, the framework Bradford Remodeling operates under as a member of the Garrison Partners family since 2004.
Written by Curtis Lane, Owner, Bradford Remodeling Co at Bradford Remodeling Co San Jose, serving San Jose and nearby areas.
Contact Bradford Remodeling Co San Jose
If you’re planning a home addition, an ADU, or the Tremron hardscape that ties it to the rest of your San Jose property, call (669) 272-2637 for a free estimate. We’ll put every price, every scope item, and every guarantee in writing before work begins, and you’ll have it in your hand when the crew arrives. That’s how we run every job, and it’s why San Jose homeowners who’ve been burned by flaky contractors call us first.
