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Techo-Bloc Home Additions & ADU: The Pasadena Owner's Guide
Here in Pasadena, a Techo-Bloc home addition or ADU typically runs $45,000 to $130,000 installed, depending on square footage, foundation work, and whether you go with a simple bump-out or a full detached unit with a kitchen and bath. We stock the Techo-Bloc pavers, wall blocks, and step units most people need, and we can usually start within a week or two of your estimate. The call usually starts the same way: a homeowner sees a cracked cap on a retaining wall, a sunken patio edge, or pavers starting to shift along the foundation line where the addition ties in. That part is the first thing to move, because it's carrying the weight of the new structure against soil that swells and settles through every Pasadena wet season. When it fails, the whole addition starts looking tired, fast.
Key takeaways:
- Techo-Bloc additions and ADUs in Pasadena typically cost $45,000 to $130,000 installed.
- We're an independent contractor. We install and repair Techo-Bloc products, but we're not affiliated with Techo-Bloc corporate.
- Most failures start at the foundation-to-paver transition, not the pavers themselves.
- You get a written price before any work starts, including parts and labor, with no change orders.
Which Techo-Bloc Models This Applies To
Techo-Bloc makes a handful of product lines that show up on Pasadena additions and ADUs: Blu 60 and Mista for patios and walkways, Para and Oterra for retaining walls and planter boxes, and Graphix or Mista bullnose caps for step edges and wall tops. The gotcha we see most often is mixing product generations. The older Mista pavers from 2015 to 2021 runs about 2 mm thicker than the current run, so if you're replacing a section after a foundation repair, you'll get a lip unless the base is re-graded. That 2 mm sounds like nothing, but it catches toes and sends water where it shouldn't go. The fix is either matching the lot number or planning a full-course layout adjustment. We always ask for a photo of the paver back face before quoting a replacement section. OEM Techo-Bloc is the right call for visible areas; for buried wall block behind the addition, a quality aftermarket unit from a local concrete producer can save you roughly 20% without giving up anything structural. The visible cap course and steps should always stay OEM so the color match doesn't announce itself from the street.
Styles & brands we work with
Signs Your Techo-Bloc Home Additions & ADU Is Failing
- Pavers sinking or tilting at the addition's foundation line. The backfilled soil next to a new ADU or bump-out settles faster than the undisturbed ground around it, and the pavers go with it.
- Gaps opening between wall blocks or between the wall and paver course. That's usually water pushing through from behind the wall. In Pasadena clay soil, water sits longer than it does in sandy ground, and every winter storm sends it looking for a seam.
- White crust (efflorescence) bleeding out of block faces. Salt and minerals leach from the concrete when water moves through it. It's cosmetic at first, but it tells you water is finding a path where it didn't before.
- Cracked bullnose caps on steps or wall tops. These are the thinnest pieces and they're the first to snap when the load shifts. Once one cracks, the adjacent ones carry more load and follow within a season or two.
- Pavers rocking under foot near downspouts or hose bibs. The base has washed out. Every additional bit of water going over that spot carves out more base material, so the wobble only gets worse.
Replacement Cost & What's Included
In Pasadena, a full Techo-Bloc addition or ADU runs $45,000 to $130,000. But if you're here because a part failed, you're probably looking at a smaller number. Replacing a failing paver section or re-laying a sinking patio edge around your addition runs roughly $3,500 to $11,000 depending on square footage and whether the base material under the pavers needs re-excavation. Rebuilding a short retaining wall with new Techo-Bloc blocks lands between $4,000 and $10,000 for a typical Pasadena side-yard or ADU enclosure. Every quote includes parts, labor, base prep, disposal, and a written price before work starts. We don't change the number at the door. The work is covered by the 365-Day Done Right Promise: if something we put in fails within a year, we fix it. That's in writing, not a handshake.
Here's how the pricing typically breaks down:
- Paver patio or walkway section repair around an addition: $3,500 – $11,000
- Retaining wall rebuild with Techo-Bloc blocks: $4,000 – $10,000
- Step caps and bullnose replacement: $800 – $2,500
- Full home addition (bump-out to full suite): $45,000 – $130,000
- Detached ADU construction: $90,000 – $220,000
See the difference
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AfterDIY or Call Us?
Here's the straight answer. You can safely inspect what's failing. Walk the paver line, note where water pools after rain, check for cracks in the caps, and take photos so you have a record. That's useful and it costs you nothing. But re-setting Techo-Bloc pavers next to a foundation is not a weekend job. You're lifting pavers that weigh 15 to 25 pounds each, re-grading base material, and compacting in lifts so the new pavers don't sink again in six months. If the failure runs along the addition's foundation line, you're also working right next to your home's structural edge. Get that wrong and water goes toward the footing instead of away from it. Retaining walls over three feet tall have real engineering needs in Pasadena's clay soil. That's the line where we tell people to call. Luca Romano has been working old Pasadena lots long enough to know when a wall just needs re-capping versus when the whole thing's leaning on borrowed time. The work tells you everything. You just have to know how to listen to it. Call (626) 657-5396 and we'll tell you straight what you're looking at, even if the answer is that you don't need us yet.
FAQs
Techo-Bloc pavers and wall blocks typically last 25 to 40 years before they need full replacement, but the base under them is the real variable here. With Pasadena's clay soil and our wet winters, a poorly drained base can fail in under 10 years and take the pavers down with it. Re-leveling and base repair will keep the same pavers in service for decades.
Yes, in most cases we can remove and re-set only the affected section without replacing the entire paver field or wall run. The catch is color matching, since Techo-Bloc runs vary slightly by batch. We'll often pull a few pavers from a less visible corner and use them in the repair area, then fill the corner with the new lot so the visible area stays uniform. Call (626) 657-5396 and we'll tell you if your section is repairable.
Most paver section repairs and cap replacements around a Pasadena addition takes one to two days on site. A full retaining wall rebuild runs three to five days depending on height and access. We give you a schedule before we start, and we stick to it with photo updates along the way.
We stock the most common Techo-Bloc pavers, wall blocks, and bullnose caps in Pasadena, and we can order any Techo-Bloc product that's in production within about a week. If your unit is from an older line that's been discontinued, we'll source a compatible match from our supplier network. You'll know the lead time and the exact price before you commit.
Talk to Us About Your Techo-Bloc Addition or ADU
If your pavers are shifting, your wall caps are cracking, or your ADU foundation line looks like it's settling wrong, don't wait until the next storm. Call (626) 657-5396 for a free estimate. We'll come out, look at what you've got, and give you a written price before any work starts. You'll know exactly who's coming, what it costs, and what we're going to do about it. No surprises, no phone tag, no disappearing act. That's how we've run every job since 2005, and it's what you get when you call Sawyer Remodel Pasadena.
Written by Luca Romano, Owner & Lead Contractor, Sawyer Remodel Pasadena at Sawyer Remodel Pasadena, serving Pasadena and nearby areas.
