Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Unilock Home Additions & ADU: The Sacramento Owner’s Guide
Unilock paving stone and retaining wall products fail most often at the base layer, not the stone itself. If your Sacramento paver patio, walkway, or Unilock retaining wall is shifting, sinking, or separating, the problem is almost always the base preparation or edge restraint, and the fix typically runs $3,500 – $11,000 for a full paver patio rebuild in the Sacramento market. Most homeowners discover the failure after the first heavy winter rain, when a low spot turns into a puddle and a puddle turns into a sunken paver field.
We’re an independent Sacramento remodeling contractor, not affiliated with Unilock. That matters because we have no incentive to sell you a full teardown when a targeted base repair will hold. Sometimes it won’t, and we’ll tell you that too, with a written price before any work starts.
Which Unilock Models This Applies To
Unilock systems fall into a few broad families: paver products (Brussels Block, Courtstone, Town Hall, Richcliff, Thornbury), wall products (U-Cara, Lineo, Pisa, Brussels Dimensional), and permeable lines (Eco-Priora, Town Hall Permeable). The failure mode is similar across all of them because they share one thing: a manufactured concrete unit sitting on a compacted base of road base aggregate and bedding sand in Sacramento’s expansive clay soils.
Here’s the compatibility gotcha most people miss: Unilock units are manufactured to specific dimensional tolerances, and if your installer mixed Unilock with a different manufacturer’s paver, the joint widths won’t match and the pattern will drift. If you’re repairing an existing Unilock installation, we need to identify the exact unit, its color, and its age before we order. Older Unilock colors fade slightly with UV exposure, so a new unit in the same “color name” from a different production year may not match. We pull a unit from an inconspicuous spot to match against the current production run before we order replacement material.
OEM Unilock material versus aftermarket equivalent: for pavers and walls, there isn’t really an aftermarket. You either buy Unilock units that match your existing field, or you accept a color drift. For the parts underneath, though (geotextile fabric, edge restraints, drainage pipe, base rock), the aftermarket products from reputable brands perform identically and cost less. We’ll use Unilock units for the visible layer and proven trade products underneath, and we’ll itemize the difference on your written estimate.
Styles & brands we work with
Signs Your Unilock Home Additions & ADU Is Failing
- Sunken or birdbath areas after rain. Water sits in a low spot for more than a few hours after Sacramento rain. This is the base layer failing, not the paver. The original install likely skipped proper compaction or used too much sand. The fix is lifts of compacted aggregate under that section, not just tossing more sand on top.
- Edge pavers sliding outward. The outer row is creeping into your lawn or garden bed. Your plastic or aluminum edge restraint is failing or was never installed. Without a solid edge, the whole field loses interlock and the pattern walks apart. This is the earliest warning sign, and it’s usually cheap to fix if caught before the field shifts.
- Weeds sprouting through joints in dense clusters. A few weeds are normal. Dense clusters mean the joint sand has washed out and the base is exposed. That open base erodes with every Sacramento downpour, and the pavers start moving.
- Retaining wall tilting forward or bulging at the face. A Unilock wall that leans more than a half inch off vertical is in structural trouble. This is usually a drainage failure behind the wall: no weep holes, clogged geotextile, or the wrong backfill. Water pressure is a force that wins every time. Any leaning wall over 3 feet tall should be addressed before the next storm season.
- Pattern drift or uneven joint widths. The field is no longer locked together. The visual cue is a zigzag where there should be a straight line in the pattern. Unilock units rely on interlock (the friction between units), and once that’s gone, every unit is free to move. This is a rebuild, not a patch.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
For a Unilock patio or walkway repair in Sacramento, you’re looking at $3,500 – $11,000 for a full paver patio rebuild, depending on square footage, access, and how much of the base needs rework. A spot repair of a small sunken area with edge restraint replacement can run $800 – $2,500. The big variable is what we find underneath once we open the area: if the original base is 2 inches of sand over dirt, we’re rebuilding the base from scratch, and that’s a larger job with a larger price, but we’ll show you what we found and explain it before we spend another dollar.
Every quote includes removal and disposal of the old material, base excavation and compaction, geotextile fabric, bedding sand, Unilock units matched to your existing color, polymeric joint sand, new edge restraints, and clean-up of the job site. The work carries our 365-Day Done Right Promise in writing. If the repair fails inside a year, we come back at no charge. And if we have to come back twice for the same issue, the second return visit is free too.
DIY or Call Us?
You can safely check a few things yourself: Is the edge restraint exposed or cracked? Is water actively ponding in one spot? Is a single wall block cracked? Those checks tell us a lot before we even arrive. What you should not do is start pulling pavers up and re-leveling them yourself. The temptation is real, the cost of a YouTube mistake is worse. Once you disturb the interlock of a Unilock field, you can’t get it back without recompacting the base, and a hand tamper in Sacramento clay won’t get you there.
If you’re near East Sacramento, Land Park, or the Arden area, we can usually look at a paver problem within a few days and give you a written price the same day. Call us at (279) 300-1177 and ask for a hard number, not a handshake.
FAQs
A properly installed Unilock paver patio on a compacted aggregate base should last 25 – 40 years in Sacramento without major structural work. The pavers themselves will survive. What fails early is the base, and that’s almost always an installation problem, not a product problem.
Yes, if the failure is localized. A single sunken area, an edge row sliding, or a wall section with a drainage issue can usually be repaired without a full teardown. If the base has failed across more than half the field, or the pattern has lost its interlock, you’re looking at a rebuild. We’ll show you exactly what we’re seeing and give you a written price for both options, so you can decide with real numbers.
Most Unilock repairs we do in Sacramento take 2 – 5 working days from demo to final compaction and sand. A full paver patio rebuild in a standard backyard runs 3 – 7 days depending on access and weather. We give you a written start date and a defined arrival window before the crew shows up.
We stock a limited set of common Unilock units and edge restraints for quick touch-ups, but matching a specific color and production run usually requires an order from the Sacramento Unilock distributor. That order takes 3 – 10 days. If your unit is a current production color, we can usually turn it around faster. Call us at (279) 300-1177 and we’ll check availability while you’re on the phone.
If you’ve got a Unilock patio, walkway, or wall that’s moving on you, don’t wait through another Sacramento winter. Water is the enemy, and every storm carries more of your base out with it. Call (279) 300-1177 for a free estimate. We’ll give you a written price before any work starts, and we’ll stand behind the repair in writing. That’s the Kingswell Way, and it’s how Trevor Nash has run every Penhallow Remodeling Sacramento job since day one. Tell me what you want the room to feel like, and I’ll tell you what it actually takes to get there.
Written by Trevor Nash, Owner, Penhallow Remodeling Sacramento at Penhallow Remodeling Sacramento, serving Sacramento and nearby areas.
