Buying a home is complicated. Buying land can be even more so, because you aren't just buying what's there. You're buying everything it will take to turn it into what you want.
A house comes with answers built in. The water is connected, the driveway exists, and someone already got the permits. With vacant land, every one of those questions is still open, and the answers can add tens of thousands of dollars, or more, to what you'll actually spend.
Over the past few years, most of the vacant land I've seen with buyers has come with very little information. Often, it's a listing photo, an acreage figure, and an invitation to "do your own due diligence." That's good advice. The problem is that many buyers don't know what that due diligence should include.
Here's where I'd start.
1. Find Out Who Actually Has Jurisdiction
A property's mailing address doesn't tell you who approves your permits. Plenty of land with an El Cajon, Escondido, or Ramona address actually sits in unincorporated San Diego County, which means the County, not the city, sets the zoning, reviews your plans, and issues your permits.
That distinction matters. Cities and the County have different zoning rules, fees, processing times, and requirements. Before you fall in love with a lot, confirm its jurisdiction and its zoning, and make sure what you want to build is actually allowed there.
2. Confirm the Lot Is Legal and Buildable
It sounds obvious, but not every parcel was legally created, and not every legal parcel can easily support a home. Ask whether the parcel appears on a recorded parcel map or has a certificate of compliance. Then look at what could limit where, or whether, you can build: slopes, drainage, protected habitat, or setbacks from roads and property lines.
3. Understand Your Access, Legally and Physically
This is the issue I see buyers underestimate most. A lot can look reachable from the road and still have no legal right of access. You need to know:
- Is there a recorded easement that gives the property access, and does it run to your parcel?
- What does that easement actually allow? Road use only, or utilities too?
- Is the road built, or is it still dirt?
- Who pays to build and maintain it?
Many recorded easements say nothing about maintenance or cost-sharing. When there's no written agreement, California law generally expects the owners who use a private road to share its upkeep, but "generally" is a long way from an agreement your neighbors have signed. If several parcels share one access road, find out who has already committed to what.
4. Get Real Numbers on Utilities
Utilities are where vacant land budgets most often fall apart. For each one, find out what's available, how far away it is, and what it will cost to bring it to your site.
Water: San Diego County is served by many different water districts, each with its own fees. Connection and capacity fees alone can be significant, and the district may require a fire hydrant or other improvements before it will serve your lot. Ask the district for a written cost estimate, and check its expiration date, since fees change.
Sewer or septic: If sewer isn't available, you'll likely need a septic system, which requires soil testing and approval through the County's Department of Environmental Health and Quality. Not every lot passes, and that result can change what you're able to build.
Electricity: Ask SDG&E what it will take to extend service to your site. The distance from existing lines can make a big difference.
5. Plan for Grading and Site Work
Most lots need some grading before a foundation can go in, and steep or uneven land can need a lot of it. Grading often requires its own permit and engineered plans, and a soils or geotechnical report may be needed as well. If a seller already has grading plans, ask who prepared them, what they cover, and whether they've been approved or are still in review.
6. Know Your Fire and Insurance Picture
Much of San Diego County sits in designated fire hazard areas. That can affect your building requirements, including how wide your access road needs to be and what materials you'll use, and it can affect whether you can get insurance and what it will cost. Talk to an insurance agent before you're in contract, not after. Fire requirements change, so confirm current standards with the fire authority that serves the property.
7. Read the Preliminary Title Report
A preliminary title report shows what's recorded against the property: liens, easements running through it, restrictions, and any rights others have to use part of your land. Read the exceptions carefully. An easement that benefits your lot is good news. One that lets someone else cross through the middle of your future backyard is not.
Add It All Up Before You Make an Offer
The price of the land is only the beginning. Before you decide what a lot is worth to you, estimate the cost of everything it will take to make it buildable: access, utilities, grading, permits, and fees. Two lots with the same asking price can have very different true costs once those are included.
It also helps to plan how you'll pay. Land loans typically require larger down payments than home loans, and many land buyers pay cash, so talk to a lender early.
What a Complete Due Diligence Package Looks Like
When a seller has done the homework ahead of time, it makes all of this much easier. For two residential lots I'm currently representing on Euclid Avenue in El Cajon, buyers can review the recorded parcel map, the preliminary title report, the recorded easement documents, engineered grading plans, and water district cost estimates before they ever schedule a showing. You can see the full package at 2255euclid.com.
Even with that information in hand, every buyer should still do their own due diligence. A complete package doesn't replace that work. It just gives you a much better place to start.
Thinking About Buying Land?
If you're considering buying vacant land in San Diego County, I'd be happy to help you think through the questions that matter for your specific property, before you commit. Reach out anytime at 760-715-6434 or Jessica@legacyhomesandestates.net.
Jessica Adams, Realtor® | Legacy Homes & Estates | eXp Realty | DRE #01986731
