For sale

$2,400,000

89 Undermountain Rd, South Egremont, MA 01258

5beds

6,092sqft

$13,527/mo

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Single Family Residence

Built in 1988

30.44 Acres Lot

$2,192,400 Zestimate^®

$394/sqft

$-- HOA

What's special

Indoor poolLarge pondThree-car garageFamily room downstairsHot tubExpansive decksLong private driveway

Welcome to Treetops. A long private driveway passing a large pond sets the scene for this impressive hilltop retreat with 6,000 square feet across three levels and seasonal views of the Taconic Hills. Built with wood hewn from trees on the property, including the distinctive stairway, the home offers a huge open-plan main level ideal for gatherings, along with an indoor pool, hot tub, sauna and a dramatic two-story primary suite. Five bedrooms and five baths provide ample space for guests, with additional bedrooms on the upper and lower levels plus a family room downstairs. A second home may be built on a conserved, included, second parcel. Expansive decks, a three-car garage, sold fully furnished, and abutting the Appalachian Trail conservation lands complete the offering.

62 days

790

66

Facts & features

Interior

Bedrooms & bathrooms

Bedrooms: 5
Bathrooms: 5
Full bathrooms: 5

Primary bedroom

Level: First

Bedroom 1

Level: First

Bedroom 2

Level: Second

Bedroom 3

Level: Lower

Bedroom 4

Level: Lower

Primary bathroom

Level: First

Full bathroom

Level: First

Full bathroom

Level: Second

Full bathroom

Level: Lower

Full bathroom

Level: Lower

Den

Description: Part of the primary suite
Level: Second

Dining room

Level: First

Family room

Level: Lower

Foyer

Level: First

Game room

Description: In the open second floor landing
Level: Second

Great room

Level: First

Kitchen

Level: First

Laundry

Level: First

Other

Description: Large indoor pool, Hot Tub and Sauna
Level: First

Heating

Oil, Boiler, Hot Water, Fireplace(s)

Appliances

Included: Built-In Electric Oven, Cooktop, Dishwasher, Dryer, Microwave, Refrigerator, Washer

Features

Cathedral Ceiling(s), Interior Balcony, Sauna, Walk-In Closet(s)
Flooring: Carpet, Ceramic Tile, Wood
Basement: Walk-Out Access,Finished
Has fireplace: Yes

Interior area

Total structure area: 6,092
Total interior livable area: 6,092 sqft

Property

Parking

Total spaces: 2
Parking features: Garaged & Off-Street
Garage spaces: 2
Details: Garaged & Off-Street

Accessibility

Accessibility features: Accessible Bedroom, Accessible Full Bath, 1st Flr Bdrm w/Bath, 1st Flr Half Bath

Features

Patio & porch: Deck, Patio
Exterior features: Privacy, Mature Landscaping
Has private pool: Yes
Pool features: In Ground
Has spa: Yes
Spa features: Indoor Hot Tub
Has view: Yes
View description: Water, Seasonal, Pond, Hill/Mountain, Distant
Has water view: Yes
Water view: Water,Pond
Waterfront features: Pond Access, Pond, Waterfront

Lot

Size: 30.44 Acres
Features: Adj to Protected Ld

Details

Parcel number: M:004.0 B:0000 L:0343 & 343B
Zoning description: Residential

Construction

Type & style

Home type: SingleFamily
Architectural style: Contemporary
Property subtype: Single Family Residence

Materials

Roof: Asphalt Shingles

Condition

Year built: 1988

Utilities & green energy

Electric: 200 Amp
Sewer: Private Sewer
Water: Well
Utilities for property: Satellite Available, Trash Private

Community & HOA

Community

Security: Alarm System

Location

Region: South Egremont

Financial & listing details

Price per square foot: $394/sqft
Tax assessed value: $2,445,300
Annual tax amount: $15,308
Date on market: 5/28/2026

Estimated market value

$2,192,400

$2.06M - $2.30M

$7,915/mo

Price history

Date	Event	Price
5/28/2026	Listed for sale	$2,400,000+15.7%$394/sqft
Source: BCMLS #249684 Report a problem
5/11/2021	Sold	$2,075,000$341/sqft
Source: BCMLS #231961 Report a problem

Public tax history

Tax history is unavailable.

Monthly payment

Est. payment

Payment breakdown

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Principal & interest
$1,547
Mortgage insurance
$0
Property taxes
$170
Home insurance
$105
HOA fees
$0
Utilities
Not included

All calculations are estimates and provided by Zillow, Inc. for informational purposes only. Actual amounts may vary.

HOA fees may include property taxes on listings classified as Co-Ops. Contact the listing agent and/or owner for fee details.

Mortgage interest rates are dependent on a number of factors, including credit score, down payment, and repayment length. Interest rate data provided by Zillow Group Marketplace, Inc. as of 1/1/1970 from various mortgage lenders with which we have lead or other similar arrangements; the Estimated Payment is an average of those rates.

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