# 661 Maxwell Ave, Boulder, CO 80304

> **TL;DR:** 5bd/6ba single family, $4,975,000 ($1061/sqft), built 1910, 4,687 sqft.
> Fireplace, View, A/C. Est. $26,607/mo. Listed 21 days.

## Property at a Glance

| Attribute | Value |
|-----------|-------|
| Price | $4,975,000 |
| Price/sqft | $1061 |
| Bedrooms | 5 |
| Bathrooms | 2 full, 1 half |
| Square Feet | 4,687 |
| Year Built | 1910 |
| Lot Size | 6,970 sqft (0.16 acres) |
| Stories | 2 |
| Property Type | Single Family (Other) |
| Status | Active |
| Days on Market | 21 |

## Why This Home Stands Out

- **Views** - Hills

## Estimated Monthly Costs

| Category | Amount |
|----------|--------|
| Principal & Interest (20% down, 30-year at 6.5%) | $25,156 |
| Estimated Insurance | $1,451 |
| **Total** | **$26,607** |

## Nearby Schools

- **Elementary:** Whittier
- **Middle:** Casey
- **High:** Boulder

## Key Amenities

- Fireplace
- View
- A/C

## Property Highlights

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

## Description

### Agent 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!)

## Location

- **Address:** 661 Maxwell Ave, Boulder, CO 80304
- **County:** Boulder
- **Neighborhood:** Mapleton Hill
- **Coordinates:** 40.021966, -105.287172
- **Google Maps:** https://www.google.com/maps?q=40.021966,-105.287172

## Virtual Tour & Media

- **Video Tour:** https://www.listingsmagic.com/sps/tour-slider/index.php?property_ID=286637

## Listing Agent

- **Name:** Karolyn Merrill
- **Brokerage:** RE/MAX of Boulder, Inc
- **Broker Phone:** (303) 441-5622
- **Listing URL:** [View original listing](https://www.realtor.com/realestateandhomes-detail/661-Maxwell-Ave_Boulder_CO_80304_M10054-38815?f=listhub&s=IRESCO&m=1070334&c=propsimple)

## Photos

![661 Maxwell Ave - Photo 1](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f298202249r.jpg)

![661 Maxwell Ave - Photo 2](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f298202249r.jpg)

![661 Maxwell Ave - Photo 3](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f1304332930r.jpg)

![661 Maxwell Ave - Photo 4](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f3576863332r.jpg)

![661 Maxwell Ave - Photo 5](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f2640852983r.jpg)

![661 Maxwell Ave - Photo 6](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f434880771r.jpg)

![661 Maxwell Ave - Photo 7](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f1587353255r.jpg)

![661 Maxwell Ave - Photo 8](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f1587353255r.jpg)

![661 Maxwell Ave - Photo 9](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f1215013059r.jpg)

![661 Maxwell Ave - Photo 10](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f3119404886r.jpg)

![661 Maxwell Ave - Photo 11](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f974116373r.jpg)

![661 Maxwell Ave - Photo 12](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f1118100468r.jpg)

![661 Maxwell Ave - Photo 13](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f1102718546r.jpg)

![661 Maxwell Ave - Photo 14](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f141786571r.jpg)

![661 Maxwell Ave - Photo 15](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f2126366152r.jpg)

![661 Maxwell Ave - Photo 16](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f1029200801r.jpg)

![661 Maxwell Ave - Photo 17](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f3175958910r.jpg)

![661 Maxwell Ave - Photo 18](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f3175958910r.jpg)

![661 Maxwell Ave - Photo 19](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f3175958910r.jpg)

![661 Maxwell Ave - Photo 20](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f1757640895r.jpg)

![661 Maxwell Ave - Photo 21](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f2577235081r.jpg)

![661 Maxwell Ave - Photo 22](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f2577235081r.jpg)

![661 Maxwell Ave - Photo 23](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f2577235081r.jpg)

![661 Maxwell Ave - Photo 24](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f2363607756r.jpg)

![661 Maxwell Ave - Photo 25](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f3987935525r.jpg)

![661 Maxwell Ave - Photo 26](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f1344465162r.jpg)

![661 Maxwell Ave - Photo 27](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f2474289503r.jpg)

![661 Maxwell Ave - Photo 28](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f2397645834r.jpg)

![661 Maxwell Ave - Photo 29](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f1570410619r.jpg)

![661 Maxwell Ave - Photo 30](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f1570410619r.jpg)

![661 Maxwell Ave - Photo 31](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f3757784788r.jpg)

![661 Maxwell Ave - Photo 32](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f1453511891r.jpg)

![661 Maxwell Ave - Photo 33](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f1453511891r.jpg)

![661 Maxwell Ave - Photo 34](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f919090814r.jpg)

![661 Maxwell Ave - Photo 35](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f919090814r.jpg)

![661 Maxwell Ave - Photo 36](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f136843654r.jpg)

![661 Maxwell Ave - Photo 37](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f237408193r.jpg)

![661 Maxwell Ave - Photo 38](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f237408193r.jpg)

![661 Maxwell Ave - Photo 39](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f308947947r.jpg)

![661 Maxwell Ave - Photo 40](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f4196595588r.jpg)

![661 Maxwell Ave - Photo 41](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f3814847715r.jpg)

![661 Maxwell Ave - Photo 42](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f4214583776r.jpg)

![661 Maxwell Ave - Photo 43](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f709828330r.jpg)

![661 Maxwell Ave - Photo 44](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f2356233758r.jpg)

![661 Maxwell Ave - Photo 45](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f3805670596r.jpg)

![661 Maxwell Ave - Photo 46](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f3805670596r.jpg)

![661 Maxwell Ave - Photo 47](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f298202249r.jpg)

![661 Maxwell Ave - Photo 48](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f3208405519r.jpg)

![661 Maxwell Ave - Photo 49](http://lh.rdcpix.com/2aa209d810e0292d761bfa5ae0cf4a75l-f3449708118r.jpg)

---

**MLS#:** 1070334 | **Updated:** 2026-10-22
**Source:** listhub

*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.*

[View on PropertySimple](https://www.propertysimple.ai/listing/661-maxwell-ave-boulder-co-80304-9bf499376a9a407abbfb84aa51f0af0b)

---

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}
```