About This Home

This 5-bedroom, 6-bathroom single family at 661 Maxwell Ave in Boulder, CO is listed for $4,975,000 ($1,061 per sqft). Built in 1910, the home offers 4,687 sqft of living space on a 0.16 acres lot.

Key Features

  • Built in 1910
  • 0.16 acre lot
  • 2 stories
  • Fireplace

Property Details

2 stories
2 full, 1 half
1910

Amenities

FireplaceViewA/C
Listing Description

A rare find in Mapleton Hill! Beautifully remodeled down to the studs in 2020 and complemented by a brand-new $1,000,000 ADU, this unique home brings together historic charm, gorgeous modern finishes and exceptional flexibility. Filled with natural light, the home offers an inviting flow with spaces that feel both connected and comfortable.

Exposed brick adds warmth and character, while hardwood floors and thoughtfully chosen finishes create a cohesive feel throughout. The custom kitchen is a standout, featuring Wolf appliances, a Sub-Zero refrigerator and a charming built-in corner table-the perfect gathering spot for morning coffee or a casual meal.

The main level includes a spacious study, a bedroom, a full bath and a powder room, providing wonderful options for guests and working from home. An elegant staircase with custom treads and metal detailing leads upstairs to the primary suite, where a generous deck captures foothill views and beautiful sunsets.

It's a lovely place to start the day or unwind in the evening. The walkout lower level expands the living space with a recreation room, two additional bedrooms and a three-quarter bath, offering room to spread out and host guests comfortably. Adding to this exceptional property is the brand-new ADU with high end finish, bringing another dimension to the home's versatility and appeal.

Walk to the Mount Sanitas trails for a morning hike or head to Pearl Street for shopping, dining and all the energy of downtown Boulder. With its blend of timeless character, modern comfort and a coveted Mapleton Hill setting, 661 Maxwell captures the best of Boulder living and with the Sundance Film Festival coming to Boulder in 2027, this location offers even more to look forward to. The main house is 3048 sq ft. ADU 1063 with a separate entrance basement 576 sq ft (great for storage!)

Monthly Cost Estimate

$26,607/mo

20% down · 6.5% · 30 years

Principal$3,598
Interest$21,558
Insurance$1,451

Estimates only. Actual payments may vary.

Location

661 Maxwell Ave

Boulder, CO 80304

Mapleton Hill

Features & Amenities

Interior Features

Eat-in KitchenSeparate Dining RoomOpen FloorplanPantryWood WindowsWalk-In Closet(s)Washer/Dryer Hookup

Exterior Features

Sprinkler System

Property Details

Flooring

Wood

Construction

Brick

Views

Hills

Outdoor Features

DeckPatio

Parking

Off Street

Heating

Forced AirRadiant

Cooling

DuctlessCeiling Fan(s)Central Air

Appliances

Gas RangeSelf Cleaning OvenDishwasherRefrigeratorWasherDryerMicrowaveDisposalFire Alarm

Questions & Answers

This 5-bedroom, 6-bathroom single family at 661 Maxwell Ave is listed at $4,975,000 ($1,061/sqft). The estimated monthly payment is $26,607 based on 20% down, a 30-year loan at 6.5% interest, estimated insurance.

Key features include: Built in 1910, 0.16 acre lot, 2 stories, Fireplace. Interior Features: Eat-in Kitchen, Separate Dining Room, Open Floorplan. Exterior Features: Sprinkler System.

This property is listed by Karolyn Merrill.

KM

Karolyn Merrill

Agent at RE/MAX of Boulder, Inc

Listed by RE/MAX of Boulder, Inc · Broker phone: (303) 441-5622 · View on Broker Site

MLS# 1070334· Source: IRES MLS· 20 days on PropertySimple

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

661 Maxwell Ave, Boulder, CO 80304

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