Under contract

Price cut: $25K (9/6)

$525,000

820 Killingworth Road, Haddam, CT 06441

3beds

2,208sqft

$3,748/mo

Get pre-qualified

Single Family Residence

Built in 1973

4.5 Acres Lot

$-- Zestimate^®

$238/sqft

$-- HOA

What's special

Peaceful natural surroundingsBeautiful in-ground poolBackyard retreat

Nestled on 4.5 private acres, this spacious 2,208-square-foot mid-century modern home offers the perfect blend of comfort, recreation, and country living. Featuring 3 bedrooms and 1 1/2 baths, the home provides a functional layout with generous living spaces designed for both everyday living and entertaining. Step outside to your own backyard retreat, complete with a beautiful in-ground pool surrounded by peaceful natural surroundings. The expansive property offers plenty of room for outdoor activities, gardening, or simply enjoying the privacy and tranquility of the setting. Conveniently located while still offering a secluded feel, this property presents a rare opportunity to enjoy space, privacy, and lifestyle in a desirable Haddam location. Don't miss the chance to make this exceptional property your own.

35 days
1,915
193

Likely to sell faster than

Facts & features

Interior

Bedrooms & bathrooms

Bedrooms: 3
Bathrooms: 3
Full bathrooms: 1
1/2 bathrooms: 2

Primary bedroom

Features: Balcony/Deck, Full Bath
Level: Main

Bedroom

Features: Vaulted Ceiling(s), Interior Balcony
Level: Main

Bedroom

Features: Vaulted Ceiling(s), Interior Balcony
Level: Main

Dining room

Features: Vaulted Ceiling(s), Balcony/Deck, Beamed Ceilings, Gas Log Fireplace
Level: Main

Family room

Features: Fireplace, Half Bath
Level: Lower

Living room

Features: 2 Story Window(s), Cathedral Ceiling(s), Balcony/Deck, Beamed Ceilings, Gas Log Fireplace
Level: Main

Heating

Forced Air, Oil

Cooling

Central Air

Appliances

Included: Oven/Range, Refrigerator, Dishwasher, Washer, Dryer, Electric Water Heater, Water Heater
Laundry: Lower Level

Features

Wired for Data
Basement: Full
Attic: Crawl Space,Access Via Hatch
Number of fireplaces: 2

Interior area

Total structure area: 2,208
Total interior livable area: 2,208 sqft
Finished area above ground: 1,488
Finished area below ground: 720

Property

Parking

Total spaces: 2
Parking features: Attached, Garage Door Opener
Attached garage spaces: 2

Features

Exterior features: Balcony, Garden
Has private pool: Yes
Pool features: Vinyl, In Ground

Lot

Size: 4.5 Acres
Features: Secluded, Level, Sloped, Open Lot

Details

Additional structures: Pool House
Parcel number: 991735
Zoning: R-2A

Construction

Type & style

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

Materials

Vinyl Siding
Foundation: Concrete Perimeter
Roof: Shingle

Condition

New construction: No
Year built: 1973

Utilities & green energy

Sewer: Septic Tank
Water: Well

Community & HOA

Community

Features: Health Club, Lake, Library, Medical Facilities, Park, Stables/Riding
Security: Security System
Subdivision: Higganum

HOA

Has HOA: No

Location

Region: Haddam

Financial & listing details

Price per square foot: $238/sqft
Tax assessed value: $286,370
Annual tax amount: $7,154
Date on market: 8/24/2026

Estimated market value

Not available

Estimated sales range

Not available

Price history

Date	Event	Price
9/11/2026	Pending sale	$525,000$238/sqft
Source: Smart MLS #24200718 Report a problem
9/6/2026	Price change	$525,000-4.5%$238/sqft
Source: Smart MLS #24200718 Report a problem
8/24/2026	Listed for sale	$550,000+117.8%$249/sqft
Source: Smart MLS #24200718 Report a problem
5/29/2015	Sold	$252,500$114/sqft
Source: Agent Provided Report a problem

Public tax history

Year	Property taxes	Tax assessment
2025	$5,876	$171,070
2024	$5,876 +1.4%	$171,070
2023	$5,794 +4.8%	$171,070
2022	$5,531 +0.5%	$171,070
2021	$5,502 -11.7%	$171,070 -13%
2020	$6,228	$196,530
2019	$6,228	$196,530
2018	$6,228	$196,530
2017	$6,228 +1.6%	$196,530
2016	$6,132	$196,530
2015	$6,132	$196,530