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Quadplex Building with Street-Corner Retail
For Sale
$1,495,000

3 Main Street, Castine, ME 04421

COMMERCIAL - Castine, ME

Property Size5,000 SF
Lot Size0.10 Acres
Price / SF$299
Days on Market221

Property Features for 3 Main Street

General Information

Property type Commercial Sale
Property subtype Other
Zoning Commercial
Rooms Basement
Parking features None
Basement Unfinished, Partial
Lot features Water View, Business District, Near Shopping
Standard status Active
Size 5,000 SF
Lot size 0.10 Acres

Taxes and HOA fees

Tax Year 2023
Tax Annual Amount 4451

Utilities

Sewer type Public Sewer
Heating system Heat Pump (Heating)
Water source Public

Building Details

Flooring type Wood, Vinyl
Building materials Clapboard
Roof type Shingle
Listing Agency: Saltmeadow Properties, Inc.
Listed By: Karen Koos
Added: Jan 7 Changed: Aug 4 Last Checked: Aug 16 at 12:06AM
MLS# 1607988

Copyright © 2026 Maine Listings. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.

Investment Insights

Based on property information with market context.

This quadplex building is configured with three commercial spaces on the ground level and four residential units on the top two floors. The property offers the new owner flexibility, including the option of providing an exclusive owner’s unit while collecting passive income from the other rental units. The building includes a basement, clapboard construction, vinyl and wood flooring, heat pump heating, and a shingle roof. Public water and public sewer service are available.

The building is situated on the corner of Main Street and Water Street in Castine, positioned as a hub of the village. It is described as having visibility from the town dock and Main Street.

With a total property size of 5,000 square feet on a 0.1-acre lot, the offering combines established commercial tenancy with residential income within a single historic structure that has stood since 1765.

Key Highlights

  • 3 commercial spaces with 4 residential units on the top two floors
  • Clapboard construction and shingle roof with a basement
  • Heat pump heating and vinyl/wood flooring

Property Analytics

Current Use

Ebee's Sweets Bakery Compass Rose Books (Bike/Boat/Book/etc) Store The Breeze & Castine Variety Restaurant

Lease Details

Multi-tenant
Tenancy
Yes
Paved road access

Location Intelligence

Trade Area within ½ mile

128
Businesses Nearby

Demographics for 04421, ME

1,320
Population
694
Households
1.9
Avg Household Size
27
Median Age
76%
College-Educated
100%
High-School Grad
7.8 sq mi
ZIP Area
169
Density / Sq Mi
$111,500
Median Household Income
$9,794
Median Earnings
$1,028
Median Rent
$557,700
Median Home Value

Market

Vacancy Rate% for Multifamily in Northeast region

4% 2022
4.6% 2023
5.3% 2024
5.6% 2025
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Frequently Asked Questions

What type of property is this?
Quadplex - Mixed-use quadplex with three commercial spaces and four residential units, set on a street corner with public utilities.
Where is this quadplex located?
The property is located at 3 Main Street Castine, ME.
What is the asking price?
The asking price for this property is $1,495,000.
What are key features of this property?
This property features: 3 commercial spaces with 4 residential units on the top two floors; Clapboard construction and shingle roof with a basement; Heat pump heating and vinyl/wood flooring
More about this property
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