Cambridge Pavers Home Additions & ADU Nationwide

Cambridge Pavers Home Additions & ADU: The Palo Alto Owner’s Guide

Cambridge Pavers home additions and ADU construction in Palo Alto typically runs $45,000-$130,000 for standard additions and $90,000-$220,000 for detached ADUs, with most Cambridge Pavers-compatible hardscape integration completed within the foundation and exterior phase. We stock Cambridge Pavers in popular Peninsula colors and patterns, and we match existing Cambridge installations when expanding outdoor living space into a new addition or ADU footprint. Most Palo Alto homeowners discover their Cambridge Pavers hardscape needs attention during the pre-construction survey, when we find settling, drainage failure, or pattern mismatch that would compromise the new structure’s integration.

Call (650) 446-9092

Which Cambridge Pavers Models This Applies To

Cambridge Pavers produces several product lines common to Palo Alto properties built or renovated between 2005 and 2020: the ArmorTec paving stones (standard 2-3/8″ thickness, 4″ x 8″ and 6″ x 6″ modular patterns), the Kingscourt Series for courtyard applications, and the Sherwood Ledgestone retaining wall system used for grade transitions around hillside additions in Old Palo Alto and Professorville. The critical compatibility gotcha is thickness matching: ArmorTec’s 60mm profile must pair with a 60mm edge restraint and bedding course depth, or the finished elevation throws off door thresholds by a half-inch that becomes expensive to correct.

To identify your existing Cambridge product, check the spacer nibs on the paver edges (ArmorTec has three small rectangular nibs; generic competitors use round dots) and measure the exact thickness with a caliper, not a ruler. We source Cambridge direct from authorized Northern California distributors, though we also stock Belgard and Techo-Bloc equivalents when the original pattern is discontinued. For ADU projects in Palo Alto’s R-1 zones, we verify the paver’s permeability rating against current stormwater requirements; Cambridge’s Permeable Pave line carries the necessary certification, while older non-permeable installations often require redesign for code compliance.

Signs Your Cambridge Pavers Hardscape Is Failing

• Sunken or tilting pavers near the addition footprint - The bedding course has washed out or compacted unevenly, usually from inadequate edge restraint or French drain failure. In Palo Alto’s clay-heavy soils, seasonal expansion accelerates the settling, and the gap becomes a trip hazard that also channels water toward the new foundation.
• White haze or efflorescence that won’t clean off - Calcium hydroxide migration from the concrete base, common in Cambridge Pavers with gray concrete bedding. The paver itself isn’t failing, but the aesthetic clash with new construction makes replacement or treatment necessary before the addition is occupied.
• Chipped corners on ArmorTec surface layer - The ceramic-dust wear surface has delaminated from freeze-thaw cycling, even in our mild climate, when drainage is poor. Cambridge warranties this for structural integrity but not surface cosmetics, so chipped pavers in visible areas need selective replacement.
• Weeds growing through joints despite polymeric sand - The sand bed has degraded or was never properly compacted in the original install. For ADU projects, this signals the base prep won’t support the load of construction traffic without further degradation.
• Pattern mismatch where old meets new - Cambridge has revised dye lots and mold textures three times since 2010. The “Cobble” pattern from 2012 uses a slightly smaller aggregate exposure than current production, and the difference is visible within ten feet in Palo Alto’s strong afternoon light.

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After

Replacement Cost & What’s Included

The range depends on three factors: access (can our mini-excavator reach the site, or are we wheelbarrowing through a Barron Park side yard?), base condition (salvageable crushed rock or full replacement), and pattern availability. Under Clause 1 of The Haven Standard, you get the written price before anyone picks up a tool, and no change proceeds without a signed change order. Our 365-Day Done Right Promise covers the installation; Cambridge’s own limited lifetime warranty covers paver structural integrity against manufacturer defect.

DIY or Call Us?

What you can safely check yourself: measure the affected area, photograph the paver pattern from directly above in natural light, and note any drainage patterns during the next rain. What goes wrong with DIY: base preparation requires plate compaction in 6″ lifts with a machine that weighs 150 pounds and costs $80 daily to rent, and the 1″ bedding course must be screeded to within 1/8″ over ten feet or the finished surface waves. For ADU-adjacent work, incorrect slope toward the foundation voids your waterproofing warranty and can redirect subsoil moisture into the new crawl space.

We’re not affiliated with Cambridge Pavers, but we’ve installed and replaced their products across the Peninsula since 2007. If you’re planning an addition or ADU and the existing hardscape is questionable, call (650) 446-9092 and we’ll survey it during your free estimate. Measure twice, write it down, then we talk.

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