
23 Prospect St Marlborough — Photo 1 of 42
Beds
7
Baths
2.5
SqFt
3,250
Style
Single Family
Built
1890
Get ready to fall head over heels for a Victorian that refuses to be boring. The James McDonald House is a magnificent 1890 Queen Anne showstopper with serious curb appeal, zero stuffiness, and completely solid bones. Spanning over 3,000 square feet, this place flexes some major architectural muscle, starting with an incredible, sprawling mahogany porch made for lazy afternoons, sunset drinks, and waving at friendly neighbors. Add in sweeping bay windows, Tuscan columns, and a classic Palladian window, and you have an exterior that always dresses to impress.Inside, the vibes just keep getting better. You are greeted by a jaw-dropping foyer, a swoon-worthy staircase, and a stained-glass window that looks like it belongs in a royal estate. Soaring ceilings, gleaming hardwood floors, and historic character give you all the grandeur without any of the stuffy museum rules. While it retains its timeless 19th-century charm, this home has been aggressively brought into the modern era with updated electrical, a new roof, and updated heating system. The kitchen features sleek, durable quartz countertops that make meal prep look effortless, flowing perfectly into a classic butler's pantry—giving you the ultimate staging area for dinner parties or just a premium spot to stash your espresso machine.With up to 7 versatile bedrooms and 3 bathrooms, there is plenty of room for guests, hobbies, or an expanding wardrobe. The entire third floor acts as your ultimate private hideaway, complete with a walk-in closet and a bonus nook that makes an incredible home office. Step outside and discover a hidden secret garden right in the middle of the city that feels like your own private wonderland. Complete with winding paths, a romantic rose temple, and plenty of leafy nooks to escape your to-do list, it is a total outdoor oasis. Perched high enough to catch great southwest views overlooking the historic Walker building lawns, this home proves you really can have historic majesty, modern quartz luxury, and a whole lot of fun at the same time. Conviently located near routes 20,85,90,290 and 495!
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Market Value Analysis
* Analysis is based on 24 actively listed and recently sold comparable properties strictly within Marlborough, MA.
Property Details
Financials
Parking
Interior Specifications
Climate & Utilities
Building & Exterior
Property & Lot
Amenities & Appliances
Gas Water Heater • Range • Dishwasher • Disposal • Refrigerator • Washer • Dryer
Neighborhood
Public Transportation • Shopping • Highway Access • Public School
Geography
Floorplan Breakdown
Structural Layout
Living Room
Lvl FirstFlooring - Hardwood, Lighting - Overhead
Dining Room
Lvl FirstFlooring - Hardwood, Lighting - Overhead
Kitchen
Lvl FirstFlooring - Hardwood, Dining Area, Pantry, Countertops - Stone/Granite/Solid, Countertops - Upgraded, Breakfast Bar / Nook, Recessed Lighting, Stainless Steel Appliances, Gas Stove
Family Room
Lvl SecondCloset, Flooring - Hardwood, Lighting - Overhead
Primary Bedroom
Lvl SecondBathroom - Full, Walk-In Closet(s), Closet, Flooring - Hardwood, Dressing Room, Lighting - Overhead
Bedroom 2
Lvl SecondBedroom 3
Lvl SecondCloset, Flooring - Hardwood, Recessed Lighting, Lighting - Overhead
Bedroom 4
Lvl ThirdBathroom - Full, Closet, Flooring - Wall to Wall Carpet
Bedroom 5
Lvl ThirdWalk-In Closet(s), Closet, Flooring - Hardwood, Lighting - Overhead
Bathroom 1
Lvl FirstBathroom - Half, Flooring - Hardwood
Bathroom 2
Lvl SecondBathroom - Full, Bathroom - With Tub & Shower, Flooring - Stone/Ceramic Tile
Bathroom 3
Lvl ThirdBathroom - Full, Bathroom - With Tub & Shower, Flooring - Stone/Ceramic Tile
Population
41,647
U.S. Census Bureau, ACS 2024 5-Year Estimates (B01003)
Median Household Income
$92K
U.S. Census Bureau, ACS 2024 5-Year Estimates (B19013)
Renter-Occupied Homes
44.0%
U.S. Census Bureau, ACS 2024 5-Year Estimates (B25003)
New Construction Permits — Middlesex County
2,698 housing units permitted in the last 12 months (+3% vs the prior 12 months) — 1,713 in 5+ unit buildings
U.S. Census Bureau, Building Permits Survey (through Jul '26)
ADU Potential
Massachusetts allows one accessory dwelling unit by right in single-family zoning districts statewide (M.G.L. c. 40A §3; 760 CMR 71.00, effective Feb 2025). Estimated maximum ADU size for this property: 900 sq ft (the lesser of 900 sq ft or half the 3,250 sq ft principal dwelling). Lot size: 11,049 sq ft.
Based on listing data, which indicates the property type — not the zoning district. Local dimensional, septic (Title 5), and historic-district requirements still apply. Not legal advice — verify with the municipality.
Listing Agent: Adam Sinewitz
Listing Office: 29 Realty Group, Inc.
MLS® Number: 73581522
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