Riverside County Parcel Map
When it comes time to write a check for raw land in Temecula, the GIS portal will help you understand what you are actually buying. The Riverside County TLMA (Transportation and Land Management Agency) GIS portal is the best kept secret for land research in the Temecula area, providing direct access to parcel boundaries, ownership information, zoning designations, assessor data, and property details for every square foot of Riverside County. The GIS portal is where serious due diligence begins, and it is completely free.
21,000+ Assessor Maps. Zero Cost.
The Riverside County Assessor maintains over 21,000 parcel maps covering the entire county, updated continuously to reflect subdivisions and lot splits. Search by APN, address, or coordinates. Every layer, every lookup, completely free.
The TLMA viewer lets you search by Assessor Parcel Number (APN), address, or coordinates and pulls up layers covering zoning, topography, flood zones, and jurisdictional overlays. The Riverside County Assessor maintains more than 21,000 maps delineating every parcel in the county, updated continuously to reflect subdivisions and lot splits. For the most pressing question in land buying, the county Planning Department also offers a dedicated "What's My Zoning?" lookup tool, so you can confirm whether that De Luz parcel supports agricultural use, residential construction, or something in between before you ever call a lender.
Riverside County GIS Tools at a Glance
| Tool | What It Covers | Access |
|---|---|---|
| TLMA GIS Viewer (Map My County) | Parcel boundaries, zoning, topography, flood zones, jurisdictional overlays | gis.countyofriverside.us |
| What's My Zoning? | Zoning designations, land use categories, overlay districts | planning.rctlma.org |
| RivCoView | Assessment data, tax records, sales history, permits | rivcoview.rivcoacr.org |
| Assessor Maps (PDF) | Parcel numbers, lot boundaries, recorded dimensions, acreage, street widths | rivcoacr.org/AssessorMaps |
| City of Temecula GIS | 70+ city data layers, fault zones, fire zones, land use, points of interest | gis.temeculaca.gov |
This free resource is essential for anyone considering a land purchase in the Temecula Valley, whether you are a first-time buyer verifying zoning on a hillside lot, an investor evaluating subdivision potential, or an agent running comparables on wine country acreage. Pair it with RivCoView (the county assessment and sales portal) and the City of Temecula GIS viewer for a complete picture. The data is authoritative, the access is free, and the alternative is buying land based on a listing description alone, which is not a strategy worth recommending.
Who is this best for?
- First-time land buyers verifying zoning, flood zones, and utility access before making an offer on a Temecula parcel
- Investors evaluating subdivision potential, lot splits, and recorded dimensions on large acreage
- Real estate agents running comparables, pulling assessor data, and confirming property boundaries for wine country listings
- Builders and developers checking topography, jurisdictional overlays, and fire zone designations before breaking ground
- Anyone doing due diligence on raw land in Riverside County who wants authoritative county data instead of listing descriptions
Sources: Riverside County TLMA GIS Viewer, Riverside County Assessor Maps, Riverside County Planning: What's My Zoning?, RivCoView, City of Temecula GIS
Key Features
Look Up Your Land Parcel
Search by APN or address to pull zoning, flood zone, and tax details for any Riverside County parcel.
Land Lookup Tool