Patio pavers sinking or uneven — San Francisco, California
Patio pavers that have sunk, shifted, or become uneven are usually caused by a poorly compacted or eroded base layer underneath. When the gravel-and-sand base settles unevenly — from water washing away sand through the joints, poor drainage directing water under the patio, tree roots pushing from below, or simply insufficient compaction during original installation — individual pavers drop, creating trip hazards and pooling water. The fix depends on the extent: for a few sunken pavers, a landscaper or mason lifts the affected pavers, adds and compacts fresh base material, re-levels the sand bed, and resets the pavers ($200–$800 for a small area). For widespread sinking, the entire patio may need to be lifted and the base re-graded and compacted ($2–$5 per square foot). Adding polymeric sand to the joints after repair prevents future washout. Addressing the drainage issue that caused the erosion is critical — otherwise the pavers will sink again.
Waarom dit veel voorkomt in San Francisco
Tight urban lots, rooftop gardens, and fog-tolerant plantings define SF landscaping, while California drought rules push drought-tolerant and water-efficient designs. Steep hillside lots frequently need retaining-wall and drainage work to manage winter runoff.
Who to call
For this problem in San Francisco, call a: Hovenier
Vind een Hovenier in San FranciscoSymptoms to look for
- Individual pavers have dropped below the surrounding level, creating uneven edges
- Water pools on the patio surface after rain instead of draining away
- Gaps between pavers have widened — sand has washed out of the joints
- Pavers wobble or rock when stepped on
- A visible slope or dip has developed where the patio was once flat
Spoeddienst in San Francisco
Emergency home services in San Francisco are available 24/7 at premium rates — expect $150–$300+/hour for after-hours plumbing or electrical, the highest tier in the US. Response times average 45–90 minutes given hilly terrain and parking scarcity. Always verify an active CSLB license and proper DBI permits.