21 Balfour Street, Lexington MA 02421

Lexington, MA 02421

$3,875,000

Est. $19,794/month

6

Beds

6.5

Baths

7,123

Sq Ft

$544

Price/Sq Ft

0.67

Acres

2026

Year Built

Single Family Residence

Type

20

Days on Market

Active Open House Listed May 15, 2026 • MLS# 73519860 Copied!

About this home

Outstanding new construction Colonial by top development group featuring superb craftsmanship and exquisite details throughout highlighting the finest millwork, cabinetry and built-ins. A brilliantly designed main level with front and rear staircases, designer kitchen with extensive custom cabinetry, oversized island, Wolf appliances and separate Sub-Zero refrigerator and freezer, along with a butler's pantry and separate prep kitchen. The flexible layout throughout provides options for a bedroom/office on main level, as well as, the lower level. Five generous bedrooms on the second level including the stunning primary suite will exceed all expectations. The finished walk-out lower level offers wonderful entertainment options with beverage center, full bath, recreational and exercise areas leading out to an expansive stone patio, custom designed deck and sprawling gorgeous backyard. Located in a sought after neighborhood with easy access to the town center and numerous amenities.

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Public Records

Current Owner

Owner 21 BALFOUR STREET LLC

Mailing Address 405 WALTHAM ST #334, LEXINGTON, MA, 02421

Land Use

Use Code 1010

Description N/A

Zoning RS

Style CONTP. COL.

Tax Information

Assessed Value $1,724,000

Assessment History

Year	Land	Building	Total	Change
FY2026	$838,000	$884,000	$1,724,000	—

Sale History

Date	Price	Book/Page
Nov 7, 2024	$1,250,000	01620/0180

Building Permit History

Issued	Type / Work	Status	Value
Aug 13, 2025	Electrical Permit Residential- One Family Dwelling Permit #E-25-858	—	$6,700
Jul 25, 2025	Mechanical Permit Residential- One Family Dwelling Installation of two Mitsubishi cold climate heat pump systems, fully ducted. Install all exhaust lines. Install two ERV systems. Install… Permit #M-25-79	—	$85,000
Jul 21, 2025	Sheet Metal Permit Residential- One Family Dwelling Installation of two Mitsubishi Cold Climate Heat Pumps. Also, insytalling fresh air make up, two ERV systems, a dehumidifier and two… Permit #S-25-106	—	$85,000
Jun 20, 2025	Plumbing Permit Residential- One Family Dwelling Permit #P-25-395	—	—
May 2, 2025	Electrical Permit Residential- One Family Dwelling Permit #E-25-438	—	$51,000
Apr 30, 2025	Electrical Permit Residential- One Family Dwelling Permit #E-25-437	—	$1,300
Apr 14, 2025	Electrical Permit Residential- One Family Dwelling Permit #E-25-381	—	$350
Apr 1, 2025	New Construction Permit Residential Construct new single family home Permit #B-25-329	—	$750,000
Mar 14, 2025	Demolition - Full Building Permit Residential- Single Family Dwelling Demo existing structure Permit #B-25-193	—	$25,000

Data: Town of Lexington Building Permit Activity

Municipal Context: LEXINGTON

Property Data Comparison

Discrepancies found between MLS and assessor records.

Field	Assessor	MLS	Match
Sqft	9,354	7,123	✗
Year built	2,025	2,026	✗

Match: address_exact (95.0% confidence) · Data as of Jun 1, 2026

Property Overview

Property Type

Single Family Residence

Listing Type

For Sale

Year Built

2026

Bedrooms

6

Full Bathrooms

6

Half Bathrooms

1

Living Area

7,123 sq ft

Total Rooms

13

Open House Schedule

05

Jun

Friday, June 5

4:30 PM - 6:00 PM EDT

06

Jun

Saturday, June 6

12:00 PM - 1:30 PM EDT

Facts & Features

2 Car Garage

Central AC

New Construction

Home Facts

Type Residential

Style Single Family Residence

Year Built 2026

Living Area 7,123 sq ft

Lot Size 0.67 acres

Bedrooms 6

Full Baths 6

Half Baths 1

Total Rooms 13

Interior

Heating Central, Forced Air, Heat Pump, Electric

Cooling Central Air, Heat Pump

Flooring Tile, Carpet, Hardwood, Flooring - Hardwood

Appliances Water Heater, Range, Oven, Dishwasher, Disposal, Microwave, Refrigerator, Freezer, Wine Refrigerator, Range Hood, Other, Wine Cooler, Second Dishwasher

Fireplace Family Room, Master Bedroom

Fireplaces 2

Basement Full, Finished, Walk-out Access, Interior Entry

Laundry Closet/cabinets - Custom Built, Sink, Second Floor, Electric Dryer Hookup, Washer Hookup

Features Bathroom - Full, Bathroom - Tiled With Shower Stall, Closet/cabinets - Custom Built, Recessed Lighting, Wainscoting, Crown Molding, Walk-in Closet(s), Lighting - Overhead, Wet Bar, Countertops - Stone/granite/solid, Office, Bedroom, Game Room, Kitchen, Central Vacuum, Wet Bar, Wired For Sound, High Speed Internet, Other

Exterior

Construction Frame

Architecture Colonial

Roof Shingle, Metal

Features Deck, Patio, Rain Gutters, Professional Landscaping, Sprinkler System, Decorative Lighting, Screens, Stone Wall

Pool None

Spa None

Fencing None

Patio/Porch Deck, Patio

Parking

Garage Spaces 2

Has Garage Yes

Features Attached, Garage Door Opener, Heated Garage, Paved Drive, Off Street

Total Spaces 10

Utilities

Electric Circuit Breakers

Water Public

Sewer Public Sewer

Gas None

Other For Electric Range, For Electric Dryer, Washer Hookup

Financial

Annual Tax 0.00

Assessed Value 0.00

Interior Features

Flooring: Tile, Carpet, Hardwood, Flooring - Hardwood

Appliances: Water Heater, Range, Oven, Dishwasher, Disposal, Microwave, Refrigerator, Freezer, Wine Refrigerator, Range Hood, Other, Wine Cooler, Second Dishwasher

Interior Features: Bathroom - Full, Bathroom - Tiled With Shower Stall, Closet/Cabinets - Custom Built, Recessed Lighting, Wainscoting, Crown Molding, Walk-In Closet(s), Lighting - Overhead, Wet bar, Countertops - Stone/Granite/Solid, Office, Bedroom, Game Room, Kitchen, Central Vacuum, Wet Bar, Wired for Sound, High Speed Internet, Other

Windows: Insulated Windows, Screens

Basement: Full, Finished, Walk-Out Access, Interior Entry

Laundry: Closet/Cabinets - Custom Built, Sink, Second Floor, Electric Dryer Hookup, Washer Hookup

Security:

Construction & Materials

Style: Colonial

Year Built: 2026

Structure Type:

Exterior Materials: Frame

Roof: Shingle, Metal

Foundation: Concrete Perimeter

Heating, Cooling & Utilities

Heating: Central, Forced Air, Heat Pump, Electric

Heating Zones: 4

Cooling: Central Air, Heat Pump

Cooling Zones: 4

Hot Water:

Water Source: Public

Sewer: Public Sewer

Energy Features: Thermostat, Other (See Remarks)

Exterior & Lot

Exterior Features: Deck, Patio, Rain Gutters, Professional Landscaping, Sprinkler System, Decorative Lighting, Screens, Stone Wall

Patio & Porch: Deck, Patio

Fencing:

Other Structures:

Lot Features: Cleared

Road Surface:

Parking & Garage

Garage Spaces: 2

Garage Type: Attached

Total Parking Spaces: 10

Parking Features: Attached, Garage Door Opener, Heated Garage, Paved Drive, Off Street

Special Features

Fireplaces: 2

Fireplace Type: Family Room, Master Bedroom

Community Amenities: Public Transportation, Shopping, Pool, Tennis Court(s), Park, Walk/Jog Trails, Golf, Medical Facility, Bike Path, Conservation Area, Highway Access, House of Worship, Public School

Location

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Neighborhood

21 Balfour Street, Lexington MA 02421

Lexington, MA 02421

Walkability

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Year 1

95% Interest

Year 15

50/50

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95% Principal

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Property History

Property Timeline

🏠

Listed for Sale

May 15, 2026

$3,875,000

Original listing

Agent: The Joyce Team Office: Compass

Date	Event	Price	Change	$/sqft	Details
05/15/2026	🏠 Listed for Sale	$3,875,000	-	-	Original listing

Price & Status History

Date	Event	Price	Change
May 15, 2026	New Listing Added	$3,875,000	—
May 13, 2026	Sold	$3,880,000	—

Market Statistics

Days on Market

20 days

Price per Sq Ft

$544

Tax History

Year	Taxes	Assessment
2026	$0	$0

Financial Details

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$0

Tax Year 2026

Assessed Value

$0

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21 Balfour Street, Lexington MA 02421

About this home

Public Records

Current Owner

Land Use

Tax Information

Assessment History

Sale History

Building Permit History

Municipal Context: LEXINGTON

Property Data Comparison

Property Overview

Open House Schedule

Facts & Features

Home Facts

Interior

Exterior

Parking

Utilities

Financial

Interior Features

Construction & Materials

Heating, Cooling & Utilities

Exterior & Lot

Parking & Garage

Special Features

Location

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Nearby Schools

Elementary Schools

Middle Schools

High Schools

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Monthly Payment Breakdown

Loan Summary

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