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Charles A. Platt designed this house in 1910 for John Teele Pratt and Ruth Baker Pratt, one of five surviving mansions built for the sons of the oil magnate Charles Pratt. It served as the summer White House under Herbert Hoover. In 1967 it became one of the country's earliest conference center hotels, trading as Harrison House until 1985. Today it is a 186 room hotel on 55 acres with a 220 seat ballroom indoors and a tent outside rated for 700. The name changed recently, and every marketplace still files it under the old one.
The three site fee answers, $35,000, $25,000 and none, describe three different commercial structures rather than one price with variance. Zola's $200 per guest covers a package running from cocktail hour through the next morning's brunch, which is why it is not comparable to a Nassau catering hall rate. Eventective's $170 to $205 sits on a listing still using the old venue name, so treat it as possibly stale. Nothing at all is published first party.
We read themansionatglencove.com including its story, weddings, wedding venues and Mansion Curators pages, plus the venue's listings on The Knot, WeddingWire, Zola and Eventective. 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.
The property rebranded from Glen Cove Mansion and every marketplace still indexes the old name. Its real site is themansionatglencove.com, while glencovemansion.com is only the email domain.
The history here is well documented and it comes from the venue rather than from listings. The Georgian style house was built in 1910 and originally called The Manor. John Teele Pratt and Ruth Baker Pratt lived in it, and Ruth Baker Pratt is described on the venue's own pages as New York's first congresswoman.
After her death in 1965 the estate became one of America's earliest conference center hotels, opening in that role in 1967 and running as Harrison House until 1985. Eventective records a renovation in 2021. The property covers 55 acres with more than 25,000 square feet of indoor and outdoor event space.
The rebrand is recent enough to be a practical problem. The property formerly traded as Glen Cove Mansion, and The Knot, WeddingWire and Eventective all still index it under that name. If you are reading reviews or comparing listings, you are looking at two names for one building.
The venue publishes a room list with square footage and capacities, which puts it ahead of most estates on this list. The Garden Ballroom on the main level runs 3,256 square feet for up to 220. The Embassy is 2,744 square feet for up to 140. The Crystal is 667 square feet for up to 40, and the Meadow dining room is 713 square feet for 36.
The Tent is the outlier. It is outdoor, 6,832 square feet, and published as holding up to 700. That is more than three times the indoor ballroom, which means a tented wedding here and an indoor wedding here are two different events on one lawn.
Other spaces are published with footprints but no capacities. The Pub sits on the third floor at 2,758 square feet with pool tables, foosball and shuffleboard, marketed as an after party room. The Pool Club is 5,390 square feet outdoors. There is a 3,392 square foot patio, an Oak room, a Library, a Lobby Bar, and named bridal and groom suites called The Birch and The Poplar.
Marketplace capacity claims wander badly. The venue's homepage says gatherings from 10 to 300. WeddingWire says 50 to 400. The Knot says 300 plus. Zola says up to 400 seated. Eventective says a 225 maximum with a 220 seat ballroom. The per room numbers on the venue's own page are the ones to trust.
This is the messiest pricing picture in the group. WeddingWire publishes a site fee of $35,000 in peak season and $25,000 off peak, plus a minimum ceremony fee of $2,000. The Knot publishes a $25,000 overall starting price, a reception line marked contact for price, and a $2,000 ceremony fee. Zola publishes no separate venue fee at all and prices per guest instead.
The seasons do not line up either. WeddingWire calls April through November peak and December through March off peak. Zola calls May through November peak. The same date can therefore be peak on one platform and not on the other.
On the per person side, Zola gives $200 per guest starting for the Platinum menu. It describes that as covering a cocktail reception, a plated dinner, dessert, an after party and a morning after brunch. Coordinator, bar, staff, setup and cleanup, bridal suite, dance floor and lighting and sound are listed alongside it. Eventective gives $170 to $205 per person, with a sample cost of $8,500 to $10,250 for 50 guests.
Treat the Eventective figures carefully. That listing still uses the pre rebrand name, which is a sign it has not been refreshed, and stale listings quote stale rates. No first party price exists on themansionatglencove.com, and no service charge percentage, administrative fee, maitre d' fee or bridal attendant fee is published by anyone.
The property is a working hotel. 186 guest rooms and suites, a published room block page, a restaurant, a lobby bar, a pub and, according to Eventective, 16 meeting rooms across 27 function areas. WeddingWire counts ten distinct event spaces.
No exclusivity policy is published anywhere. That is not a criticism of a hotel, it is a description of one. If having the grounds to yourselves matters, ask what a buyout costs and whether it is offered at all, and ask what else is on the calendar for your date.
The upside of a hotel is real. Out of town guests sleep on site. The after party has a dedicated room with a shuffleboard table in it, and Zola's package includes brunch the next morning. That is a two day wedding with nobody driving.
Zola says all alcohol is provided by the venue and outside beverages are not permitted. WeddingWire says outside alcohol is permitted with restrictions. Those cannot both be right, and neither is confirmed on the venue's own pages.
For most couples this is academic. For anyone planning to bring a family wine, a particular spirit or a cultural drink service, it is the whole question. Get the answer in writing before the deposit.
On vendors the venue publishes a preferred network it calls Mansion Curators, covering planning, hair and makeup, gowns, floral, photo and video, musicians, an officiant, transportation and a wedding day nanny. Nothing on that page says the list is mandatory, and no outside vendor fee is published. Catering is in house with an on site chef.
One correction worth making early. The venue's site is themansionatglencove.com. The address glencovemansion.com is the email domain, used for addresses like info and marketing, and it is not where the current wedding pages live. Older link lists point at the wrong one.
No end time, curfew or event length is published on the venue's pages or on any marketplace. A third floor after party room and a next morning brunch imply the night runs long, and no times are stated anywhere.
There is no published rain plan either. Indoor fallback exists in fact, since the Garden Ballroom, the Embassy and the Crystal are all indoors while the Tent, the Pool Club and the Patio are not. What is missing is the rule, and it matters, because a 700 person tented plan has no indoor equivalent in a 220 seat ballroom.
The tour questions here are specific. Which spaces are contracted to you and which stay shared with the hotel. What a buyout costs. Whether outside alcohol is genuinely permitted. What the service charge percentage is. And whether the site fee is $25,000, $35,000 or nothing, because three platforms give three answers.
A 120 acre Lessing's estate in Woodbury whose wedding menu publishes a 22% administrative fee, one of the few on Long Island that prints the number.
A 1918 Roslyn Heights mansion restored to its 1920s look, with a 150 guest minimum and a peak season starting price of $35,000 on WeddingWire.
The former Sans Souci house above Long Island Sound, one event at a time, a 205 seat ballroom, and $155 to $225 a head published on their own site.
A 1923 Tudor Revival house on 86 acres above Long Island Sound, rented as a venue only for a flat fee, with a caterer you hire yourself.
Members only for Mansion events since the Village's 9 April 2025 notice, on roughly 210 Sands Point acres with a Tom Doak golf course.
A 1916 Delano & Aldrich manor that says it books members and non members alike, with a $2,000 ceremony fee on WeddingWire and no per person rate anywhere.