Colonias: what homebuyers should know
Updated October 27, 2026
Colonias are subdivisions, mostly along the Texas–Mexico border, that were sold without some of the basics: safe water, sewer, paved roads, drainage or a legal plat. Hundreds of thousands of Texans live in them. If you're buying land or a home in the border region, check whether it's in one and what services it has.
How the state classifies them
| Class | Meaning (Texas Attorney General) |
|---|---|
| Red | Lacks safe drinking water, adequate wastewater service or a legal plat. |
| Yellow | Has water and wastewater but lacks paved roads, drainage or trash service. |
| Green | Has water, wastewater, paved roads and a legal plat. |
What can go wrong
- No water or sewer hookup. Without a legal plat, utilities may be barred from connecting a lot, and a septic permit may be refused on a small lot.
- Contract for deed. Many lots were sold this way: you pay in installments and get the deed at the end. Texas law requires the seller to record the contract and send yearly statements, but missed payments can still cost you the property.
- Flooding. Some colonias sit in floodplains with little drainage.
What to check
- Is the lot in a recorded, approved subdivision plat? Ask the county.
- Can it connect to water and sewer? Ask the utility in writing.
- If there's a contract for deed, is it recorded with the county clerk, and is there a title policy?
- Is the lot in a FEMA flood zone, and does an irrigation district charge it?
For border-region addresses, HouseDirt checks the Attorney General's colonia map and, where a county publishes its own colonia survey or irrigation districts, those too.
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Common questions
- What is a colonia in Texas?
- A colonia is a residential area, usually rural and near the Texas–Mexico border, that lacks some basic services such as safe drinking water, sewer, paved roads, drainage or a legal plat. Many were sold lot by lot under contracts for deed.
- What do red, yellow and green colonias mean?
- The Texas Attorney General classifies colonias by services. Red: lacks safe drinking water, adequate wastewater service or a legal plat. Yellow: has water and wastewater but lacks paved roads, drainage or trash service. Green: has water, wastewater, paved roads and a legal plat.
- What is a contract for deed?
- A contract for deed (an executory contract) lets a buyer pay the seller in installments while the seller keeps legal title until the end. Texas Property Code chapter 5, subchapter D, adds protections, such as recording the contract and an annual statement, but buyers can still lose the property if payments are missed.
Sources
- Texas Attorney General, colonias
- Texas Secretary of State, colonias
- Texas Property Code, chapter 5 subchapter D (executory contracts)
- Texas Water Development Board, Economically Distressed Areas Program
More explainers
- MUD and PID taxes in TexasSpecial districts that can add thousands a year to a tax bill, and the notices sellers owe you.
- FEMA flood zones: AE, VE, X and DWhat each zone on the flood map means, and when a lender requires flood insurance.
- TWIA windstorm insurance on the Texas coastWhy coastal homes often need a separate wind and hail policy, and the certificate it depends on.
- Unpaid property taxes and tax liens in TexasA Texas tax lien stays with the house. How penalties grow and how to make sure it's paid at closing.
- The Texas homestead exemptionThe $140,000 school-tax exemption, the 10% cap, and how to apply after you move in.
- Buying a Texas home with a septic systemPermits, aerobic maintenance contracts and inspections for on-site sewage systems.