Mattituck, NY

Deep Hole Creek Conservation

Photo Credit: Rita Rooney



Not open to the public
4180 New Suffolk Ave, Mattituck, NY 11952


July 7th Update

We are so incredibly grateful to, and inspired by, all of you. Thanks to your generosity, we have raised over $565,000 toward the purchase and protection of this property. 

We have good news, though still very much a work in progress: recently, the Trust made a conditional offer to the seller, and the Koehler family would like to work with us as we address/resolve these conditions over the coming weeks!

We are so pleased that the Koehlers support our conservation effort, which has taken off because of community engagement. We look forward to working with the Koehlers to achieve a community conservation outcome. 

As with any conservation project, there are many details that need to fall into place for all parties to move toward a hopeful contract. While we can't share more yet, we want you to know that with a willing seller, we are doing everything we can to make this a conservation success. 

If we can move forward, additional pledges will be needed to enable this project to come to fruition and for the land to be preserved forever. As soon as we can, we will communicate these details and more - but in the meantime, your pledges to support this project are still very much needed and welcome!

Quick Links:

The Path to Conservation:

The owners of 15 acres in Mattituck, located on New Suffolk Avenue at Deep Hole Creek (the headwaters of Great Peconic Bay), are in the process of finalizing a 7-lot subdivision with the Town of Southold. This is the last parcel of undeveloped property on the creek. 

The Trust, in consultation with donors and neighbors, is working to secure a conservation buyer who will retain private ownership of the parcel, and use it or lease it for agricultural purposes. This approach opens the opportunity for Southold Town to join our effort with Community Preservation Fund dollars, and the Town has agreed to do so! 

The Town will purchase the development rights on this parcel from the seller, which means that the land is preserved and the new (private) owner can farm it, or have it farmed.



To date, the community has generously raised over $565,000 in pledges toward the protection of this property. Through a unique collaboration with the landowner and the Town of Southold, the Trust is working to facilitate protection of this property with a conservation buyer.

It is only through the community’s strong voice that this potential project has come together, and inspired the Seller, Peconic Land Trust, and Southold Town to collaborate.

Take Action! How You Can Help:

Conservation is absolutely within our reach if we can move quickly, creatively, and generously – together! We need your help in the following ways:

  • Identifying a conservation buyer: The Trust (along with the seller’s real estate broker) is working on this. If you’re interested, or know someone who is, please contact Holly Sanford.
  • Finding or becoming a community hero donor: if you can pledge $50,000 or $100,000 – or if you can refer us to someone who can, please contact Alison Delaney.
  • All pledges count! Please join us with a pledge in any amount! Or, if you have already made a pledge but want to increase the amount, or if you would consider a multi-year pledge, please complete our pledge form or contact Alison Delaney.

Thank you for your interest in this project and for your generosity, and for joining the community to help protect the north fork!

Interested in learning more, or have additional questions? Please contact us:

Alison Delaney, Development Officer:, or 631.283.3195, x44.

Holly Sanford, Project Manager:, or 631.283.3195, x26.


  • Location: 4180 New Suffolk Avenue (intersection of Marratooka Road), in Mattituck
  • Size: 15 acres
  • Zoning: R-80 (potential for 7 lots)
  • Asking Price: $3.3 million

Photo Credit: Rita Rooney

Get Directions

Deep Hole Creek Conservation

Get Directions

Deep Hole Creek Conservation

4180 New Suffolk Ave, Mattituck, NY 11952

Get Involved

To download a pledge form click here. Contact Alison Delaney, Development Officer, 631.283.3195, ext. 44 and Holly Sanford, Project Manager, 631.283.3195, ext. 26 for more information.


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