A concrete patio in San Diego should sit on prepared soil and a compacted base, slope slightly away from the house, and have control joints plus an isolation joint at the foundation. Keep irrigation off the slab edges, since uneven soil moisture is a leading cause of lifted corners. Check HOA rules, and ask whether local landscape rules apply.
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San Diego's climate makes a patio usable most of the year, so many homeowners treat it as an extra room: a dining area, an outdoor kitchen, a fire feature or a shaded lounge. A poured concrete patio is a common way to build that space. What makes it last is the same here as anywhere, a stable base, good drainage and smart joints, but the local soil and water habits change the details.
Planning the patio
- Size for how you'll use it. Lay out furniture, a grill or an outdoor kitchen and leave room to walk around it.
- Sun and heat. Inland patios facing south or west get hot in summer. Lighter colors, textured finishes and shade structures all help.
- Access. Many backyards on hillside or tract lots have no truck access, so concrete is pumped or wheeled in. That affects cost and scheduling.
- Future plans. If you might add a patio cover, pergola, outdoor kitchen or spa, say so now. Posts and heavy loads may need footings, and covered structures usually need a building permit.
Drainage and irrigation
A patio should slope slightly away from the house. In San Diego, the bigger daily threat is often irrigation. San Diego County's geology review notes that expansive soils can be aggravated by how a property is watered, and a lawn or planter that is watered right up to a slab edge keeps that soil wetter than the soil under the middle. That difference is a common reason patio corners lift or crack. Keep spray heads aimed away from the concrete, consider drip irrigation in nearby beds, and plan where the patio's runoff goes.
Water-wise landscaping
California's Model Water Efficient Landscape Ordinance (MWELO), adopted locally by cities and counties, applies to new landscapes of 500 square feet or more and to rehabilitated landscapes of 2,500 square feet or more when a permit, plan check or design review is involved. If your patio is part of a larger yard makeover, ask your city whether its landscape rules apply and how the patio fits the plan. Replacing thirsty lawn with hardscape and low-water plants is a common San Diego project, and local water agencies have offered turf replacement programs; check current terms with your water provider before you count on one.
Base, thickness and joints
Patios are commonly about four inches thick over a compacted base. Soil near the house is often backfill from the original construction and can settle. Control joints divide the slab into roughly square panels, and an isolation joint where the patio meets the house lets each move on its own.
Finish options
- Broom finish: simple and slip-resistant.
- Exposed aggregate: textured, good traction, hides dirt.
- Salt finish: a lightly pitted texture common around pools in Southern California.
- Stamped or colored: see our stamped and decorative concrete page.
Permits and HOAs
Whether a ground-level patio needs a permit depends on the city and the project. Many San Diego County neighborhoods, especially master-planned communities, have HOA architectural review for patios, colors and covers. Coastal properties may also have coastal zone rules. Check with your HOA and city before the pour.
Questions to ask
- How will the slab drain, and how will you handle irrigation near the edges?
- Is the soil here expansive, and how will you prepare it?
- Where will joints go, including at the house?
- How will concrete get to the backyard?
Ready to plan it? Request a patio contractor and share a photo of the space.
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Frequently asked questions
Do I need a permit for a concrete patio in San Diego County?
A simple ground-level slab often doesn't, but it depends on the city, the size and whether it's part of a larger project. Patio covers, outdoor kitchens with gas or electrical, and work in coastal zones often need permits. Check with your city and HOA.
Does MWELO affect my patio?
California's water-efficient landscape rules apply to landscape projects above certain sizes that need a permit or plan review: 500 square feet for new landscapes and 2,500 for rehabilitated ones. A patio alone usually isn't the trigger, but a full yard redo might be. Ask your city.
Why are my patio corners lifting?
On San Diego's expansive clay, soil that is watered more at the edges than under the middle can swell and push corners up. Redirect sprinklers, use drip in nearby beds and make sure runoff moves away from the slab.
Sources and further reading
- American Concrete Institute (ACI)
- Portland Cement Association (PCA)
- California Contractors State License Board: C-8 Concrete Contractor
- CSLB: License requirement for minor work increases to $1,000 (AB 2622)
- County of San Diego General Plan Update EIR: Geology and Soils (expansive soils)
- City of San Diego Development Services: Information Bulletin 165, Public Right-of-Way Permits
- City of San Diego Transportation Department: Sidewalk maintenance responsibility
- City of San Diego Stormwater
- California Department of Water Resources: Model Water Efficient Landscape Ordinance
- County of San Diego: Excavation Permit Brochure (DigAlert notice)
- DigAlert: Underground Service Alert of Southern California (811)