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Belgard Home Additions & ADU: The Houston Owner’s Guide
Belgard home additions and ADU projects in Houston typically run $45,000 to $130,000 installed, depending on foundation work, square footage, utility rough-ins, and the Belgard paver or wall systems you integrate into the build. A detached ADU lands higher, $90,000 to $220,000. We schedule a site walk within days, not weeks, and the written price you get before any work starts is the number you pay at close.
Most homeowners don’t discover a failing part on a Belgard addition or ADU the way they’d notice a cracked paver. What tips them off is usually a door that won’t square, a hairline crack running along the paver course near the foundation line, or water pooling against the Belgium block retaining wall after a hard Houston rain. The part isn’t one component, it’s the integration: the substrate under the pavers, the edge restraint, the drainage plane behind the wall. When one of those fails, the visible Belgard surface is the last thing to show it.
We’re an independent Houston remodeling contractor. We install and repair Belgard hardscape systems, but we are not a Belgard company and do not claim to be.
Key Takeaways:
- Installed Belgard home addition or ADU work in Houston runs $45,000 – $130,000; detached ADUs start around $90,000.
- Most “Belgard failures” on additions and ADUs trace back to the substrate, drainage, or edge restraint, not the paver itself.
- We pull permits, schedule inspections, and hand you a written 365-Day Done Right Promise at job close.
- Call (940) 289-7658 for a free site walk and a written scope.
Which Belgard Models This Applies To
Belgard’s paver and wall lines run deep. On Houston additions and ADUs, the products we see most are from the Cambridge Cobble, Catalina Slate, and Bergerac collections for pavers, with Dublin and Highland wall blocks handling retaining and knee walls. The compatibility gotcha: Belgard pavers are manufactured in different thicknesses, and the 60mm paver rated for a patio will not carry vehicle or structural load. If your addition includes a paver driveway approach or a load-bearing wall, you need the 80mm product or a structural wall block, not the thinner aesthetic profile.
Identifying the right replacement part means finding the manufacturer stamp on the underside of a loose paver or the end of a wall cap. It lists the collection name and lot number. Lot numbers matter because color blends shift between production runs. A Catalina Slate paver from a 2022 lot won’t perfectly match a 2025 lot, and in full sun that mismatch shows. When we can’t match a discontinued lot, we order the closest current run and blend the replacement course across the entire section so the repair doesn’t read as a patch.
On the OEM-versus-aftermarket question for Belgard specifically: there isn’t a true aftermarket for Belgard pavers. Anything claiming to be a “compatible equivalent” is a different manufacturer’s paver with a different dimensional tolerance and color blend. We install OEM Belgard on repairs. For substrate and drainage components like geotextile fabric, gravel bases, and perforated pipe, we source rated materials that meet or exceed the Belgard installation spec, because that’s where long-term failure lives in Houston.
Styles & brands we work with
Signs Your Belgard Home Addition or ADU Is Failing
- Hairline cracks running along the paver course at the foundation line. This is almost always substrate settling. Houston’s clay soil expands and contracts with moisture, and a thin or poorly compacted base shifts. The paver didn’t fail, the prep under it did.
- Water pooling against a Belgard retaining wall after rain. The drainage plane behind the wall is clogged or was never installed with the right gravel and pipe. In Houston’s monsoon stretches, that hydrostatic pressure will bow the wall within two or three seasons.
- Paver edges spreading or separating at the perimeter. The edge restraint failed or was omitted. Without a rigid border, the interlock degrades from the outside in, and you’ll see the course start to walk.
- A door or window on the addition no longer squares. On a slab-on-grade addition, this often means the slab has moved. It’s not a cosmetic issue. Call a contractor before you have a structural problem.
- Efflorescence, that white chalky residue, that keeps returning on wall block. Persistent efflorescence means water is moving through the wall, not around it. Sealing the face won’t fix it, the water source behind the wall has to be addressed.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
For Houston, a full Belgard addition or ADU build runs $45,000 to $130,000. A detached ADU is $90,000 to $220,000. Smaller scoped repairs inside those projects, like a paver course reset, edge restraint replacement, or drainage correction, typically fall between $1,500 and $7,000 depending on square footage and access. Every number we give comes as a written line-item price before work starts. That’s not a courtesy, it’s how we run the job.
| Scope | Houston Installed Range |
|---|---|
| Home addition (attached, slab-on-grade) | $45,000 – $130,000 |
| Detached ADU (full utility rough-in) | $90,000 – $220,000 |
| Garage conversion | $30,000 – $80,000 |
| Belgard paver course reset / edge repair | $1,500 – $4,500 |
| Drainage correction behind Belgard wall | $2,000 – $7,000 |
What drives the range is foundation condition, utility distances for ADUs, and the Belgard product line you choose. A Cambridge Cobble patio is not the same cost as a Bergerac paver driveway rated for vehicle load. Parts and labor are separated on the written quote, and every completed project carries the 365-Day Done Right Promise. If the work fails inside a year, we come back and fix it at no charge. That’s in writing, signed, in your hand at close.
DIY or Call Us?
There’s not much safe DIY on a Belgard failure that’s tied to your home’s structure or drainage. You can pull a loose paver and check the base depth under it. You can look for visible edge restraint. You can clear surface debris from drainage outlets. That’s about where the homeowner lane ends. Resetting a settled course means cutting out the section, recompacting the base to spec, and relaying the interlock, and if the issue is behind a retaining wall, you’re moving soil and stone with a wall that’s under load. That’s not a weekend project, and getting it wrong in Houston clay just means you pay for the repair twice.
If the paver surface is failing, the problem is underneath it. We’ll scope the full repair and give you a straight number. Call (940) 289-7658 and we’ll schedule the walk.
FAQs
A properly installed Belgard paver system on a compacted base should carry 20 to 30 years in Houston before any meaningful repair. The pavers themselves won’t be the failure point. Houston’s clay soil and wet-dry cycles attack the base and drainage first, and most “paver failures” we see are actually base failures showing through the surface. If your base was done right, the course stays true for decades. Call (940) 289-7658 and we’ll tell you straight whether your base is the problem.
Yes, in most cases the hardscape can be repaired section by section without touching the structure. We cut out the failed section, fix the base or drainage issue that caused it, and relay the pavers using the closest matching lot. The repair is invisible when done right. Call (940) 289-7658 for a free assessment and a written price on just the repair.
A scoped paver or drainage repair typically takes 2 to 4 working days. A full home addition or ADU build runs 3 to 8 months depending on permits, foundation work, and utility rough-ins. We put the timeline in the written scope before you sign anything, and we hold to it. Call (940) 289-7658 to get a straight timeline for your project.
We order OEM Belgard pavers and wall block directly for each project, matched by collection name and lot number. We do not keep pallets of every Belgard line sitting in a Houston yard, and neither does anyone else who is honest about it. What we do keep on hand are the substrate and drainage materials that fail first: geotextile fabric, gravel, edge restraint, and perforated pipe. Call (940) 289-7658 and we’ll verify stock and lead time for your Belgard collection.
Straight scope, straight number, that’s the whole conversation. Curtis Lane reads a project the same way every time, and the written price you get is the price we build to.
Written by Curtis Lane, Owner, Bradford Remodeling Co Houston at Bradford Remodeling Co Houston, serving Houston and nearby areas.
