A home loan in Katy, TX is a residential mortgage in the sprawling area west of Houston that spans three counties and two school districts. Most of what people call Katy lies outside the small incorporated city, in unincorporated Harris, Fort Bend and Waller counties — which means the loan questions here are about which ZIP, which district, which MUD, and whether the property sits inside a reservoir flood pool.
Key Takeaways for Katy Buyers
- Katy closed roughly 6,481 single-family homes in 2025 — more than any other market in Greater Houston.
- The four Katy ZIP codes are genuinely different markets. Medians run from $268,000 in 77449 to $485,000 in 77494.
- Nearly all growth is in 77493, which added roughly 700 closings a year since 2023 while 77449 declined.
- Addicks and Barker Reservoirs sit at Katy’s eastern edge. Homes inside their flood pools flooded during Harvey despite sitting outside the 100-year floodplain.
- Since September 2019, Texas sellers must disclose floodplain, flood pool and reservoir status — a disclosure that did not exist when many Katy homes last changed hands.
- Katy ISD and Lamar Consolidated ISD split the area roughly along FM 1463. Zoning follows the address, not the mailing city.
Katy Is Four Markets, Not One
This is the single most useful thing to understand before you shop here. A “Katy median price” is close to meaningless, because the four Katy ZIP codes behave like separate cities.
Source*
About this figure. Closing counts and median prices come from MLS records that update on a rolling basis, and recent months can revise upward as late closings post. Treat these as approximate and current as of the last available data.
Where the Market Is Moving
77493 is the story. It closed 2,651 homes in 2023 and 3,373 in 2025 — growth of more than a quarter in two years, and more volume by itself than any other suburb in the metro except the rest of Katy. That is where Elyson, Sunterra, Cane Island and Katy Manor are absorbing new construction.
77449 moved the opposite direction, falling from 1,229 closings to 973 over the same period. Same mailing address, opposite trajectory, and a median roughly $70,000 below the next-cheapest Katy ZIP. If you are comparing Katy to another suburb using a single median, you are comparing an average of four markets that have little in common.
For a buyer, this is genuinely good news. Very few Houston-area markets let you shop a $270,000 starter home and a $500,000 move-up home under the same school district reputation and the same commute. It does mean the first conversation should be about which band you actually belong in, based on the full payment rather than the list price — because a $340,000 home in a new high-rate MUD section can cost more per month than a $400,000 home in an established one.
What Is a Reservoir Flood Pool, and Why Does It Matter Here?
Addicks and Barker Reservoirs were built in the 1940s to protect downtown Houston from Buffalo Bayou flooding. They are not lakes. Most of the year they are fields, parks and golf courses. They fill only during major storms — and the land they fill is the flood pool.
Over the decades, subdivisions were built inside those pools. During Hurricane Harvey, homes in and around the reservoirs took on water — including properties that sat entirely outside the 100-year floodplain and therefore carried no flood insurance and no lender requirement to have any. Litigation followed, and federal courts found the flooding of upstream properties amounted to a compensable taking.
The lending consequence is direct: flood zone status and flood pool status are two different questions. A property can be outside the FEMA floodplain, require no flood insurance from your lender, and still sit inside a reservoir pool. If you rely only on the lender’s flood determination, you will never learn that.
The disclosure that now exists
Effective September 2019, Texas expanded the residential seller’s disclosure notice to cover floodplain, flood pool and reservoir status, along with flood history and related definitions. If a seller fails to disclose and had actual knowledge, a buyer may have grounds to terminate or to pursue a claim. Read Section 5 of the disclosure carefully, and understand that homes which last sold before 2019 changed hands without it.
Which Katy Are You Buying In?
Give us the ZIP and the community. We will build the payment from the right district rates, check the flood picture properly, and shop the file across multiple lenders — no upfront credit pull required to start.
LET’S TALKThree Counties, Two School Districts
The City of Katy itself is small and straddles Harris, Fort Bend and Waller counties. The vast majority of what carries a Katy address is unincorporated, spread across all three. Which county your address falls in determines the appraisal district, where you file your homestead exemption, and the county and drainage rates on your bill.
Katy ISD carries strong name recognition and drives real demand — but it does not cover everything with a Katy address. The Katy ISD and Lamar Consolidated ISD boundary runs roughly along FM 1463, and communities on the Fulshear side of that line are Lamar CISD even where the mailing address says Katy. Cinco Ranch proper sits east of the line and is entirely Katy ISD.
Because Katy ISD zoning affects both price and resale demand, this is not a detail to verify after you are under contract. Confirm campuses by exact address, and remember the district rezones as it grows — an assignment from three years ago may not hold.
One more county-level wrinkle worth knowing: homestead exemption amounts and appraisal practices are not identical across Harris, Fort Bend and Waller. If you are moving within the Katy area and crossing a county line, do not assume your tax bill will scale proportionally with your purchase price. Run it fresh.
Which Katy Communities Do We Finance?
New construction has moved north and west. The established communities now trade almost entirely as resale.
Cinco Ranch
The defining Katy master plan, now considered built out and trading as resale. Entirely Katy ISD. Some sections — notably Canyon Gate — sit within the Barker Reservoir flood pool, so verify by address.
Elyson
One of the main destinations for new-construction buyers in 77493, with a deep builder lineup and active sections. Expect newer MUD debt and correspondingly higher rates.
Cane Island & Sunterra
Amenity-driven newer communities on the north and west edges. Sunterra’s crystal lagoon is a genuine differentiator; both carry assessments worth confirming in writing.
Seven Meadows & Firethorne
Established west-side communities in the upper price tier, where 77494’s $485,000 median comes from. Some files here reach jumbo territory.
Nottingham Country & Bear Creek
Older established neighborhoods on the eastern side, closer to the reservoirs. Flood pool status and roof age are the first two things to check.
Katy Manor & North 77493
The most accessible entry into new construction with a Katy address. Verify school zoning carefully; boundaries here shift as campuses open.
Which Loan Programs Fit Katy?
Because the price range here is so wide, Katy uses more of the program spectrum than any other suburb in the metro — entry-level FHA in 77449 and jumbo files in 77494, often in the same week.
To model a payment, use the mortgage calculator with the actual combined rate for that community rather than a Katy-wide average.
Who Is Buying in Katy?
The Energy Corridor is the engine. I-10 runs straight from Katy into one of the largest concentrations of energy employment in the country, and that commute has shaped this market for thirty years. It also shapes the loan files: energy sector borrowers frequently carry bonus income, restricted stock, or contract arrangements that lenders treat very differently from one another. Some will count a bonus with a shorter history; some will not count it at all without two years.
The second group is international relocation. Katy has one of the most globally diverse populations in the metro, and a meaningful share of buyers arrive with limited or no U.S. credit history, foreign income, or visa status questions. None of those are disqualifying, but they narrow which lenders will look at the file — and the difference between a lender who handles these routinely and one who does not is the difference between closing and starting over.
The third is simply families following Katy ISD. That demand is what holds value in this market through slower cycles, and it is why the school zoning question deserves the attention it gets.
How Should You Approach a Katy Purchase?
- Decide which Katy you are shopping. The ZIP determines price band, construction age, and often the school district.
- Read Section 5 of the seller’s disclosure closely. Floodplain, flood pool, reservoir and flood history. This is the document that did not exist before September 2019.
- Get the flood determination and the pool question answered separately. They are different questions with different answers.
- Identify the county and the MUD. Three counties are in play, and district rates vary by section.
- Confirm Katy ISD or Lamar CISD by address. The FM 1463 line matters to both your family and your resale.
- Compare builder incentives against an outside loan. Competition in 77493 is intense, which makes incentives negotiable.
- Fund escrow on the fully assessed value. On new construction, the first-year lot-only bill understates year two.
If You Already Own in Katy
Katy has a deep base of long-tenured owners in Cinco Ranch, Nottingham Country and the established 77450 neighborhoods, many with substantial equity. Texas caps homestead borrowing at 80% combined loan-to-value across all liens, with a 12-day waiting period from application and a three-day right of cancellation after closing.
And the rule that trips people up: VA and FHA cash-out refinances are not available on a Texas homestead. Those files run as conventional Section 50(a)(6) loans instead — worth a second opinion if you have been told otherwise.
Katy Home Loan Questions
＋ Why do Katy home prices vary so much?
Because the Katy postal area covers four ZIP codes with very different housing stock. Medians run from roughly $268,000 in 77449 to about $485,000 in 77494. Construction age, lot size, school zoning and district tax rates all differ across them.
＋ What is a reservoir flood pool?
It is the land that Addicks and Barker Reservoirs fill during major storms. Most of the year it is dry parkland. Subdivisions were built inside those pools over the decades, and homes there took on water during Harvey even though many sat outside the 100-year floodplain.
＋ If my lender does not require flood insurance, am I safe?
Not necessarily. Lender requirements follow FEMA flood zone designation, which is a different question from flood pool status. A property can be outside the floodplain, carry no lender flood requirement, and still sit inside a reservoir pool. Ask both questions.
＋ Does the seller have to tell me about flood pool status?
Since September 2019, Texas seller’s disclosure covers floodplain, flood pool and reservoir status along with flood history. If a seller with actual knowledge fails to disclose, a buyer may have grounds to terminate or pursue a claim. Homes that last sold before 2019 changed hands without that requirement.
＋ Is everything with a Katy address in Katy ISD?
No. The Katy ISD and Lamar Consolidated ISD boundary runs roughly along FM 1463, and communities on the Fulshear side carry Katy mailing addresses while being zoned to Lamar CISD. Confirm campuses by exact address, since the district also rezones as it grows.
＋ Which county is Katy in?
Depending on the address, Harris, Fort Bend or Waller. The incorporated city itself spans all three, and most of the Katy area is unincorporated. Your county determines the appraisal district, homestead exemption filing, and county tax lines.
＋ Is there still new construction in Cinco Ranch?
Essentially no. Cinco Ranch is considered complete and trades as a resale market. New-construction buyers are generally directed to communities such as Elyson, Sunterra, Cane Island, or the Fulshear-corridor communities nearby.
＋ Will I need a jumbo loan in Katy?
Sometimes, mostly in the upper-tier 77494 communities. Jumbo guidelines are set by individual lenders rather than by the agencies, so documentation and reserve requirements vary considerably. We place jumbo files across multiple lenders so those differences work in your favor.
＋ Can I get preapproved without a credit pull?
We can review your scenario, structure the file and discuss options before pulling credit. A formal preapproval that a builder or seller will rely on does require a credit report, but the exploratory work does not.
About the Author
Adam Bartling is a licensed Texas mortgage broker and loan officer, and a retired U.S. Army Captain, based in Fort Bend County. He works exclusively in Texas, shopping each file across multiple lenders so they compete for the business rather than steering clients into a single institution’s product menu.
Focus areas include new construction financing, jumbo placement, flood and reservoir underwriting, Texas Section 50(a)(6) home equity rules, and VA lending.
Related Pages
- Houston Mortgage Broker — compare every Houston-area community in one place
- Home Loans in Fulshear, TX — the Lamar CISD side of the FM 1463 line
- Home Loans in Cypress, TX — the northwest equivalent on MUD structure
- Texas First-Time Homebuyer Guide
- Mortgage Calculator
