Cambridge Pavers Home Additions & ADU Nationwide

Cambridge Pavers Home Additions & ADU: The San Jose Owner’s Guide

If you own a Cambridge Pavers patio, walkway, or driveway in San Jose and you’re planning an addition or ADU, matching the new hardscape to your existing pavers is the part most contractors get wrong. A Cambridge Pavers-compatible home addition or ADU project in San Jose typically runs $53,100–$153,400, with the paver work accounting for roughly $4,130–$21,240 depending on grade changes, drainage, and whether we’re reusing existing material. Most homeowners discover the problem after the fact: the new foundation shifts, the old pavers don’t match the new ones, or water pools against the addition because the grading was an afterthought.

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Which Cambridge Pavers Models This Applies To

Cambridge Pavers manufactures three main lines that show up in San Jose backyards: the Ledgestone series (tumbled, irregular edges), the Maytrx series (smooth, modular), and the RoundTable collection (cobbled, circular patterns). Each runs in 60mm, 80mm, and 100mm thicknesses, and here’s the compatibility gotcha: an 80mm Maytrx paver will not sit flush next to an 80mm Ledgestone paver because the edge profiles differ by roughly 3–5mm. That gap is exactly where weeds, ants, and water start working their way in. Before we order anything, we pull a single paver from the existing surface, measure the width, length, and thickness with calipers, and match the series against Cambridge’s current catalog. OEM Cambridge Pavers are the reliable choice for color and dimension matching, but quality aftermarket equivalents from Belgard or Unilock can work when the original series is discontinued, as long as we’re matching the joint width and base depth. Penhallow Remodeling San Jose is an independent remodeler and hardscape contractor, not affiliated with Cambridge Pavers, but we’ve worked with enough of their product in San Jose yards to know what holds up.

Signs Your Cambridge Pavers Home Additions & ADU Is Failing

• Settling along the addition’s drip line. Roof runoff from the new addition concentrates in one spot and erodes the base material underneath the pavers, usually within the first two wet seasons. You’ll see a visible dip forming a shallow trough three to six inches from the foundation.
• Color mismatch between old and new sections. Cambridge Pavers fade under California UV exposure over five to seven years, so brand-new units from the same series will almost never match pavers that have been down since 2019. This is the number one complaint we hear from San Jose homeowners after a generic contractor “patched” the paver field.
• Heaving at the paver-to-foundation junction. San Jose’s clay-heavy soil expands when wet and shrinks when dry. If the addition’s foundation wasn’t isolated from the paver base with an expansion joint or proper edge restraint, the pavers will lift and crack along that seam within one full rainy season.
• Water pooling against the new wall. Grading that slopes toward the addition instead of away from it sends water under the pavers and toward the sill plate. In San Jose, where we get a few intense storms rather than steady drizzle, a single downpour can move enough water to saturate the base and start the shifting process.
• Faded or stripped paver surface texture. Older Cambridge units with a tumbled finish lose their surface grip after years of foot traffic and pressure washing. When we’re tying new pavers into a worn field, the difference in traction is as noticeable as the color difference.

Replacement Cost & What’s Included

A full Cambridge Pavers home addition or ADU project in San Jose lands between $53,100 and $153,400. On the low end, you’re looking at a single-story bump-out or garage conversion with basic finish work and minimal paver disturbance. The high end covers a detached ADU with foundation, framing, full kitchen and bath, plus a paver patio, walkway, and driveway tie-in. The paver component itself—removing and relaying existing units, adding new Cambridge Pavers to match, and compacting the base—runs $4,130 to $21,240 depending on square footage and whether we need to haul in fresh aggregate. Every Penhallow Remodeling San Jose project gets a written price before work starts, so the number you approve is the number on the invoice. There are no change orders hiding behind the word “unforeseen.” The 365-Day Done Right Promise covers the work in writing for a full year: if the pavers shift, the joint cracks, or the drainage fails inside that window, we come back and fix it at no charge.

DIY or Call Us?

There’s an honest split here. You can safely check the slope: use a four-foot level near the foundation and make sure the grade drops at least half an inch per foot away from the addition. You can also measure your existing pavers and look for the series stamp on the underside. What you shouldn’t do is start pulling pavers and rebuilding the base yourself. Heavy paver work on clay soil requires a plate compactor, the right depth of Class II road base, and an edge restraint that will hold under the weight of summer expansion and winter saturation. Get it wrong and the pavers will look fine for four months and fail inside the first real storm. If your Cambridge Pavers addition or ADU is showing signs of trouble, call (669) 274-2362 and we’ll walk the site, take measurements, and hand you a written number.