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Isabella Rossellini founded this farm in 2013. It now runs to 28 acres in Brookhaven under a Peconic Land Trust conservation easement, overseen by executive director Elettra Wiedemann, and laid out like an Italian piazza. It also prints its prices, which puts it in a small minority on this island. Intimate gatherings of up to 25 guests start at $7,500. Anything from 26 guests upward is $14,000, and that fee includes exclusive use of the whole farm for the weekend, two nights in the four bedroom bed and breakfast, and a late checkout on Sunday.
The site fees here are first party, current and unusually clear, which is rare enough to be worth saying twice. What they do not include is the caterer, the tent, the rentals or the planner the farm requires above 25 guests. Build that full number before you compare $14,000 against a per head price somewhere with a roof.
We read the farm's gathering, private events and about pages, its superseded weddings page, a 2021 Northforker article and its The Knot listing, on 10 September 2026. Checked September 2026. First party means the venue’s own site or rate card; marketplace means The Knot, WeddingWire, Zola, Wedding Spot or similar. Nothing here is averaged or estimated.
A professional planner is mandatory above 25 guests and no rain plan is published for an entirely outdoor venue holding up to 150, so the tent and the planner belong in the budget from the start.
The large gathering fee is $14,000 for 26 guests or more. The farm states that it covers exclusive use of Mama Farm for the full weekend, two nights at the four bedroom and three bathroom bed and breakfast, which sleeps up to eight, and a late checkout on Sunday.
Compare that to a catering hall selling a five hour block and the shape of the deal is different. You are renting a property for two nights, and the wedding is one thing that happens on it. Rehearsal dinner Friday, wedding Saturday, breakfast Sunday, all on the same 28 acres, with the immediate family asleep upstairs.
The smaller tier starts at $7,500 for up to 25 guests. The word starting is doing work there, and the farm does not publish what moves the number.
The farm requires a professional planner for any gathering over 25 guests. That is a published rule, not a suggestion, and it is a real line in your budget that does not appear in the site fee.
It also tells you what kind of venue this is. There is no banquet manager who has run four hundred weddings in this room, because there is no room. Somebody has to build the day out of an empty meadow, and the farm has decided that somebody is a professional you pay.
Price a full service planner for your guest count and add it to the $14,000 before you compare this against anything with a ballroom in it.
Mama Farm works exclusively with preferred partners it has personally vetted. That includes caterers who source organic food from the farm's own fields and from other local farms. No outside vendor fee is published, and no open vendor route is offered.
There is no per person rate from the farm, because the farm does not sell food. Catering is contracted separately with a partner caterer, who prices your menu, and there is no house food and beverage minimum to clear.
The regenerative farming and the conservation easement are not decoration here. The easement is held by the Peconic Land Trust, which means the land is protected from development in perpetuity, and the vegetables at your dinner may have come out of the ground you are standing on.
Capacity is up to 150 guests, published on both the about page and the private events page. Ceremony, cocktails, dining and dancing are all described across open meadows, woodland edges and designed outdoor areas.
The indoor space is a bed and breakfast kitchen and a studio garage the farm describes as flippable. Neither is sized for 150 people, and the farm publishes no rain plan.
So a tent is not optional at this venue, it is the roof, and its cost sits on top of the site fee alongside the planner and the caterer. Ask the farm which tent companies its partners use, where a tent can physically go on land under easement, and what the contingency is if a storm arrives on the Saturday of a weekend you have already paid for.
The farm's site retains an older page headed Weddings, marked as previous, which sits at a different address from the current offer. Prices and terms there are superseded. Work only from the current gathering page.
Second, an $8,000 figure circulates for this venue in third party venue data. Nothing on the farm's own site supports it. The published fees are $7,500 for up to 25 guests and $14,000 for 26 or more, and those are the numbers to plan against.
For context on the property, Northforker covered the opening of the bed and breakfast in 2021. That piece is the most substantial outside reporting we found on the place, and it predates the current wedding offer, so read it for atmosphere rather than for terms.
Set $14,000 against a Long Island catering hall and you are comparing two different products. The hall sells a five hour block with food, staff, tables, linen and a roof, priced per head. Mama Farm sells 28 acres for a weekend and nothing else at all.
So do the arithmetic properly before you judge it. Site fee, plus a caterer for your guest count, plus the tent, plus tables and chairs and china and glass, plus the bar, plus the planner the farm requires above 25 guests. That total is the number that compares.
What the farm gives you in return is the two nights. A Friday rehearsal dinner in a meadow and a Sunday morning with eight people in the house are real events, and each would carry its own venue bill almost anywhere else.
It also gives you a ceiling of 150 guests and a good reason to stay well under it. Everything here happens outdoors, so every additional guest is more tent, more rental and more work for the planner you are already paying.
An East Setauket working farm listed at $4,000 to $11,000 per event for 50 to 250 guests, with outside catering allowed and no first party source we could read.
A riverfront Calverton farm taking 50 to 200 guests June through October, open to any caterer you hire, with amplified music off at 9pm.
A 1,500 square foot barn on a 28 acre museum farm that takes 99 guests, rented dry, with a $1,000 deposit against a site fee nobody publishes.
A 75 acre Peconic orchard with a private Sound beach, outside caterers allowed, and one site fee on record that lists peak season below the starting rate.