Ask a buyer what their new home's address means and they will talk about school pickup lines and train platforms. Ask what it means for their water and waste, and most have no idea, because in Katonah the answer does not follow the zip code. It follows a boundary line the Town of Bedford drew around its Consolidated Water District decades ago, and that line still decides whether you are hooked into municipal infrastructure or running your own private utility company out of your backyard.
This is not a hypothetical distinction. The town spent the better part of a decade and $13.1 million proving it matters.
Two Katonahs, One Zip Code
The Town of Bedford's Consolidated Water District serves the hamlet cores of Katonah and Bedford Hills, roughly 2,137 homes and businesses. Outside that district boundary, the town is explicit: every other property draws from a private well it does not operate or maintain. Same hamlet name on the mailbox, same school district, same commuter rail line into the city. Completely different relationship to the ground under the house.
For a buyer comparing two listings that both say "Katonah," this is the variable that determines what your due diligence period actually needs to accomplish. A home inside the water district means a straightforward check of municipal billing and metering. A home outside it means the well is now yours, the septic field is now yours, and nobody from the town is coming to service either one.
What Just Changed on Bedford, Edgemont, and Valley Roads
If you want proof that this line has real financial weight, look at what the town just finished building. On August 1, 2025, the Bedford Hills-Katonah Phase II Sewer Project became fully operational, eliminating century-old individual septic systems and cesspools for 108 properties across Bedford Hills and Katonah. Eighty-nine of those were residential parcels concentrated along Bedford Road, Edgemont Road, and Valley Road in Katonah.
The project cost $13.1 million and traces back to a 2020 referendum that passed with 96.1 percent approval among the affected property owners. Most of the funding came from outside sources, including New York City's Department of Environmental Protection, because the underlying goal was watershed protection: those Katonah streets sit close enough to the Muscoot Reservoir and New Croton Reservoir, both part of the New York City drinking water system, that failing septic systems there were treated as a regional water quality issue, not just a homeowner headache. Then-Supervisor Chris Burdick and Town of Bedford DPW Commissioner Kevin Winn are the names attached to getting it built.
Here is the part that matters for anyone shopping in Katonah right now. Every house on those 89 parcels changed its fundamental utility profile just over a year ago. If you are looking at a listing on Bedford, Edgemont, or Valley Road, do not assume the disclosure your agent hands you reflects the old septic setup. Confirm whether the seller has completed the sewer lateral connection and formally abandoned the old tank, because the town's process for that involves pumping the tank and filling it with gravel or other inert material, and a half-finished conversion is its own kind of problem to inherit.
Why This Belongs in Your Inspection Contingency
New York's Property Condition Disclosure Statement requires every seller of residential property to answer two questions with real teeth: what is the water source (well, private, or municipal), and what type of sewage system serves the home (public sewer, private sewer, septic, or cesspool). If the answer is septic or cesspool, the seller also has to state the system's age, the date it was last pumped, how often it gets pumped, and whether there are any known material defects.
That form got more specific recently. Effective July 1, 2025, New York amended the disclosure statement to add a pointer directing sellers to the state Department of Health's informational pamphlet on septic system operation and maintenance, a change tied to General Business Law section 396-s. It is a small addition on paper, but it signals where regulators think sellers have historically been vague, and vague septic answers are exactly what creates disputes after closing.
If you are buying a well-and-septic home in Katonah, do not treat the disclosure form as a formality to skim before signing. Ask for the actual pump records, not just the date the seller remembers. Ask when the well was last tested for water quality and flow rate, a question the disclosure form asks the seller to answer but does not require them to have ever actually done. A seller checking "unknown" is not a red flag by itself, but it is your cue to order the test yourself rather than assume no news is good news.
The Costs Nobody Puts in the Listing Photos
Septic systems are common in New York, not rare. Roughly a quarter of homes statewide rely on one, and the state's rules for them live in Appendix 75-A of the Sanitary Code, enforced locally through the county health department. A few numbers worth knowing before you write an offer on a well-and-septic property:
- A new system or major repair always requires a permit, and the work has to respect a 100-foot setback from private wells and watercourses, a rule that on a tight or ledgy Katonah lot can limit where a system is even allowed to go if it ever needs replacing.
- Recommended pumping frequency runs every three to five years depending on household size and tank capacity, not on a fixed calendar the town tracks for you.
- State law does not require a septic inspection at the time of sale, but many counties and most lenders do, which means you should ask your lender early rather than discovering the requirement mid-contract.
None of this shows up in a listing's square footage or lot size. It shows up in the disclosure form, in the pump records, and in how much runway you build into your inspection contingency.
What This Means If You're Buying or Selling in Katonah
For buyers, the practical move is simple: before you fall in love with a house, find out whether it sits inside the Consolidated Water District or outside it. Your agent can confirm this against the town's water district map. If it is outside, budget time and money for a water quality test and a septic evaluation, and do not waive that contingency just because the market is competitive. A failed well test or a soggy leach field discovered after you have removed contingencies is a far more expensive problem than the same discovery during due diligence.
For sellers on a well-and-septic property, get ahead of the disclosure form instead of filling it out the night before signing. Pull your pump records, schedule a water test if you have not had one recently, and be specific rather than vague when you answer the state's questions. A seller who can hand a buyer's agent a clean, documented answer to "when was this last pumped" moves faster through negotiation than one who checks "unknown" and hopes nobody asks twice.
A Few Direct Questions
Does every home in Katonah use municipal water and sewer? No. The Town of Bedford's Consolidated Water District covers the hamlet cores of Katonah and Bedford Hills. Properties outside that boundary run on private wells the town does not operate or maintain.
Is a septic inspection required to sell a home in Katonah? New York State does not mandate one at the point of sale, but county health departments and many mortgage lenders do require it, so check with your lender before you assume it is optional.
What happened with the Bedford Hills-Katonah sewer project? Phase II became fully operational on August 1, 2025, converting 89 residential properties in Katonah, mostly along Bedford, Edgemont, and Valley Roads, from individual septic systems to municipal sewer, as part of a broader effort to protect the Muscoot and New Croton Reservoirs.
Buying or selling a home in Katonah means paying attention to details the address alone will never tell you. If you want someone who tracks which streets just changed utility status and knows exactly what questions the disclosure form should answer before you sign anything, Christine Ryan has spent her career doing precisely that work across Katonah and the surrounding Hudson Valley. Schedule your free consultation and get the local read before you write an offer.
