2026-10-28 · 4 min read · Orange County
What Should We Check in the Backyard Before We Buy a House in Orange County?
The short answer
What should you check in the backyard before you buy a house in Orange County? Start with how water drains away from the house, then look at fences and gates, large trees near the sewer line, the irrigation system, any slopes or retaining walls, permits for structures like patio covers or an ADU, and pool features if there is one. Then read the Natural Hazard Disclosure and use your inspection period to ask questions.
Why Does the Backyard Deserve Its Own Walk-Through?
What should you check in the backyard before you buy a house in Orange County? More than most buyers expect. Grading, drainage, the sewer line and the walls that hold back soil all live out there, and you can't see them from the living room.
I'm Jeanette Nelson, a REALTOR® with Jeanette Nelson Real Estate, Keller Williams Realty, serving Orange County, Huntington Beach, Costa Mesa, Fountain Valley, and surrounding areas. When a grassy yard is a big reason you're leaving a condo, look at it as closely as the kitchen.
Your home inspection covers part of the yard, and the inspector may suggest a specialist for anything it flags.
How Do We Check Drainage, Grading and Slopes?
Water should move away from the house, not toward it. Walk the yard and look for:
- Soil or hardscape that slopes toward the foundation
- Water stains or soil lines on walls and the base of the house
- Low spots, eroded areas or patches that stay soggy
- Downspouts that empty right next to the house
- Yard drains that are clogged or broken
Retaining walls deserve a slow look. Leaning, bowing or long cracks are worth asking an engineer about before you remove your inspection contingency. On a hillside lot, ask whether each slope belongs to the owner or an HOA.
What Should We Know About Fences, Trees and Sewer Lines?
Fences and gates. Check that gates close and latch on their own and that posts and boards are solid. A fence line doesn't always match the property line. California's Good Neighbor Fence Act, Civil Code Section 841, presumes that adjoining owners share the reasonable cost of a boundary fence equally unless they agree otherwise in writing. It also requires 30 days' written notice before an owner incurs those costs. This is general information, so talk with a real estate attorney about a specific fence question.
Trees and roots. Large trees give shade, and their roots can also find their way into the sewer line. The City of Huntington Beach notes that frequent cleaning or root removal may point to a lateral break or root intrusion, and in Huntington Beach the owner pays to repair the part of the lateral on private property. A sewer lateral inspection uses a camera to see inside the line.
What About Irrigation and Water Use?
Turn on each sprinkler zone and watch it run. Look for broken heads, overspray onto walls and a controller that works.
A grass yard uses water. The California Department of Water Resources says the Model Water Efficient Landscape Ordinance sets water efficiency standards for new development and retrofitted landscapes. Local agencies must adopt it or an ordinance at least as effective, so if a yard project needs a permit, ask your city which standards apply.
If the home is in an HOA, California Civil Code Section 4735 says governing documents can't prohibit low water-using plants as a group or as a replacement for existing turf. The association can still set landscaping rules.
Do Patio Covers, Pools or an ADU Need a Permit Check?
Yes, check permits for the specific property. Patio covers, block walls, outdoor kitchens and accessory dwelling units (ADUs) often need permits. In Huntington Beach, you can request building records for an address, and other cities have their own process. The California Department of Housing and Community Development's ADU handbook explains state ADU rules, and the city handles the permits. See buying a home with unpermitted work if records don't match what you see.
Pools and spas. Under the California Swimming Pool Safety Act, Health and Safety Code Section 115922 requires at least two of seven drowning prevention safety features when a permit is issued to build or remodel a pool or spa at a private single-family home. Ask your home inspector to note which of these features the pool or spa has. See buying a home with a pool for more.
What Hazard Information Should We Read?
The seller provides a Natural Hazard Disclosure Statement showing whether the property sits in mapped zones, such as a FEMA flood hazard area or a seismic hazard zone. The California Geological Survey says seismic hazard zones cover areas mapped for liquefaction and earthquake-induced landslides, which matters on a sloped lot. Our Natural Hazard Disclosure article explains the report.
Easements matter too. A utility easement along the back fence can limit where you add a pool or an ADU. Recorded easements appear in your preliminary title report.
Let's Start With a Conversation
If you're moving from a condo to your first house, I'd love to help you plan which inspections make sense for the yard. Call or text me at 714.366.8575 | DRE: 01397168, or contact me. Jeanette Nelson is a REALTOR® with Jeanette Nelson Real Estate, Keller Williams Realty, serving Orange County, Huntington Beach, Costa Mesa, Fountain Valley, and surrounding areas.
Frequently asked questions
Does a home inspection cover the backyard?
Partly. Inspectors usually look at grading near the house, visible drainage and some exterior structures, and may recommend a specialist.
Who pays for a shared fence in California?
Civil Code Section 841 presumes neighbors share the reasonable cost equally unless they agree otherwise in writing. For a specific situation, talk with a real estate attorney.
Should we get a sewer camera inspection if the yard has big trees?
Many buyers do, since roots can grow into the line. It's an optional inspection you can add during your contingency period.
Can we replace the grass if the home is in an HOA?
Civil Code Section 4735 says governing documents can't prohibit low water-using plants as a replacement for existing turf. The HOA can still set landscaping rules.
How do we know if a patio cover was permitted?
Ask the city for the building records on that address and compare them to what you see in the yard.