Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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Before
AfterTecho-Bloc Home Additions & ADU: The Mountain View Owner’s Guide
We stock and install Techo-Bloc-compatible hardscape systems for home additions and ADU projects in Mountain View, with typical installed pricing from $45,000 to $130,000 for additions and $90,000 to $220,000 for detached ADUs. Most homeowners discover their Techo-Bloc system needs attention when patio pavers settle unevenly after winter rains, or when the permeable base beneath a new addition fails to drain the clay-heavy soil common in Old Mountain View and the Monta Loma neighborhood. We carry the full Techo-Bloc catalog, including the Eva, Blu, and Villagio series, and can match existing installations for seamless expansion work.
Which Techo-Bloc Models This Applies To
Techo-Bloc organizes its residential hardscape lines by application thickness and edge profile, and getting the match right matters when you’re tying a new ADU patio into an existing home addition walkway. The Eva series, Blu 60mm and 80mm pavers, and Villagio flagstone-style slabs are the most common matches we see in Mountain View, particularly in the Cuesta Park and Blossom Valley areas where Techo-Bloc first gained traction with builders in the 2015-2020 cycle. To identify your exact match, flip a loose paver and check the stamped manufacturing code, which includes the series abbreviation and production batch. The color name alone won’t suffice, Techo-Bloc’s “Greyed Nickel” has shifted formulation twice since 2018, and the 2021 batch runs noticeably cooler than earlier lots.
We source OEM Techo-Bloc direct from the manufacturer for color-critical expansion work, and we stock Belgard equivalents for budget-conscious repairs where an exact match isn’t structurally necessary. The Belgard Catalina line interlocks at the same 60mm height as Blu, though the chamfer edge differs by 2mm, a gap that shows under low-angle morning light if you’re not prepared for it.
Signs Your Techo-Bloc Home Additions & ADU Is Failing
- Pavers rock underfoot or sit proud of adjacent slabs. This usually means the bedding sand layer has washed out or the geotextile fabric beneath has torn, allowing the native Mountain View clay to migrate upward and create voids. We see this most often where downspouts discharge directly onto the hardscape without a splash block.
- Standing water that persists more than 30 minutes after rain. Techo-Bloc’s permeable systems rely on an open-graded stone base, when this clogs with sediment or was installed too shallow, water backs up at the surface. In the San Antonio neighborhood, where lots grade toward the foundation, this can funnel water into a new addition’s stem wall.
- Chipped corners or spalling surface texture. Techo-Bloc’s high-density concrete holds up well, but the Villagio series in particular is vulnerable to impact from metal-edged snow shovels or pressure washer wand tips held too close. Once the face seal is compromised, freeze-thaw cycling accelerates the damage, even in Mountain View’s mild climate.
- Weeds growing through joints despite polymeric sand. The sand bed has degraded or the initial installation skipped the compaction step, leaving voids where organic matter collects. This is a symptom, not the disease, the underlying base needs assessment before re-sanding.
- Expansion joints that have closed completely or opened beyond 3/4 inch. Techo-Bloc systems need room to move with seasonal temperature swings, when adjacent concrete footings or addition slabs constrain this movement, pavers buckle outward or crack at their weakest point.
Before
AfterReplacement Cost & What’s Included
| Scope | Price Range in Mountain View | What’s Included |
|---|---|---|
| Partial patio/walkway reset (under 400 sq ft) | $4,500-$12,000 | Lift and regrade, new bedding sand, polymeric sand joints, 1-year workmanship warranty |
| Full base reconstruction (permeable system) | $8,000-$18,000 | Excavation to 8-inch depth, open-graded base, geotextile, re-lay existing pavers where color-matched, photo documentation |
| Home addition with integrated Techo-Bloc hardscape | $45,000-$130,000 | Written scope, flat price, signed change order protocol, 365-Day Done Right Promise |
| Detached ADU with full hardscape package | $90,000-$220,000 | Permit coordination, utility tie-ins, documented photo record on every visit |
What drives the range: soil condition at excavation, access for equipment, and whether we’re matching existing Techo-Bloc color lots or starting fresh. Under Clause 1 of the Haven Standard, the price is written before anyone starts, every time, on every trade. No change proceeds without a signed change order, the discipline that has kept our projects within a few percent of the agreed cost across 4,000-plus jobs since 2007. The 365-Day Done Right Promise applies to all work, if it’s not done right, we make it right, backed by printed terms, not an asterisk.
DIY or Call Us?
There’s a short list of checks any Mountain View homeowner can make safely: verify the downspout isn’t dumping onto the hardscape, look for visible edge restraint separation, and photograph any stamped codes on loose pavers for reference. What goes wrong fast is the excavation, lifting a 60mm Techo-Bloc paver without disturbing the bedding course takes a suction cup or paver extractor, and digging blind with a spade in this clay soil guarantees an uneven reset that fails again in two seasons. The base layer, typically 3/4-inch clean crushed stone over geotextile, must be compacted in lifts with a plate compactor, hand-tamping won’t achieve the 95% Proctor density Techo-Bloc specifies for residential traffic loads.
We’re not affiliated with Techo-Bloc, we’re an independent contractor with direct sourcing relationships and the tools to do this once, correctly. Call (669) 215-4852 to schedule your free estimate, we’ll bring sample boards and measure your existing installation on the first visit.
FAQs
A properly installed open-graded base with geotextile separation typically lasts 20-25 years in Mountain View’s mild, wet-winter climate, though clay soil migration can cut that to 12-15 years if the initial excavation didn’t reach stable subgrade. The 2016-2019 building boom in the Jackson Park area produced several shortcuts we now repair regularly. Call (669) 215-4852 for an exact assessment, estimates are free.
Most Techo-Bloc pavers can be lifted, cleaned, and re-laid if the surface isn’t spalled and the color lot is still available for any replacements. We inventory the most common Mountain View colors, Greyed Nickel, Chocolate Brown, and Beige Cream, and can source OEM matches within 10 business days for discontinued lots. Call (669) 215-4852 to schedule your free estimate.
A partial reset under 400 square feet takes 2-3 days, full base reconstruction runs 4-6 days depending on access and whether we need to protect adjacent landscaping. Home additions and ADU projects span 8-16 weeks from permit to final walkthrough, with hardscape integration scheduled in the final phase. Call (669) 215-4852 for a written timeline with your scope.
We maintain a running inventory of Techo-Bloc’s Blu and Eva series in the three most common Mountain View colorways, plus Belgard equivalents for faster-turn repairs. For color-critical expansion work, we order OEM direct with a 7-14 day lead time and confirm the lot match before any excavation begins. Call (669) 215-4852 to check current stock against your stamped paver code.
Measure twice, write it down, then build it that way. Grant Rowan learned that discipline at Los Angeles Trade-Technical College, where he spent two years on framing, concrete, and finish work before ever picking up a paycheck on a real site. He’s applied it across Mountain View for years now, from projects near Castro Street to additions in the surrounding downtown blocks, and the crew still delivers a documented photo record on every visit, included as standard, not an upgrade.
Ready to price your Techo-Bloc home addition or ADU project? Call (669) 215-4852 to schedule your free estimate. We’ll bring sample boards, review your existing hardscape match, and deliver a written price before any work starts, because Clause 1 of the Haven Standard is the whole point.
Written by Grant Rowan, Owner, Rowan Construction Group Mountain View at Rowan Construction Group Mountain View, serving Mountain View and nearby areas.