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For sale
$1,550,000
4beds
4,420sqft

821 Incorrigible Circle, Longmont, CO 80504

4beds
4,420sqft
Single family residence
Built in 2001
5,443 sqft
3 Garage spaces
$351 price/sqft
$110/mo HOA

What's special

Designed for those who appreciate exceptional architecture, thoughtful design & creative living, this remarkable residence is tucked into one of the quietest pockets of Prospect New Town, Longmont's iconic urban village known for its award-winning architecture, boutique shops, artisan coffee, local dining, parks & walkable streets. Surrounded by mature trees, no neighbors behind, a peaceful setting offering rare privacy, private alley & a detached oversized 3-car garage. Every space was designed with purpose where industrial influences, contemporary finishes & artistic character come together effortlessly. Entertain from the rooftop terrace, host unforgettable evenings around the custom indoor bar or escape to the courtyard featuring a tranquil waterfall pond, mature landscaping & ample seating areas. Above the garage, sits the 1 Bed / 1 Bath (576 Addtl. Sqft) Carriage House featuring its own entrance, kitchen, living area & laundry, offering outstanding flexibility for multi-generational living, private guest accommodations or valuable short/long-term rental income. Three exclusive parking spaces beside the garage make guest access effortless. The primary suite offers a peaceful retreat with a fireplace, spa-inspired bathroom featuring steam shower jets, dual vanities & expansive dual walk-in closets. The spacious secondary bedrooms are filled with natural light while the inviting front porch offers the perfect place to begin or end each day. The finished basement even functions as a private guest suite with living area, kitchenette, bedroom & bathroom. Some homes are built to fit in, this was designed to stand apart. With its rare blend of architectural creativity, functional flexibility, income-producing potential & an unmatched location within Prospect New Town, this is a place where neighbors become friends, community comes naturally & every day is enriched by the beauty that surrounds you. You'll regret not seeing this one! Schedule your private tour today!

6 days
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805
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36
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Source: REcolorado as distributed by MLS GRID,MLS#: 9560556MLS Logo
Travel times

Relaxing Living Room

Chef's Kitchen w. Butler Pantry

Grand Primary Bedroom

Luxurious Primary Bathroom

Carriage House (ADU) Living Room / Kitchen

Carriage House (ADU) Bed / Bath

Private Courtyard Oasis

Roof Top Deck

3rd Floor Speak Easy

2nd Floor Bedrooms / Bath

Entry / Foyer / Half Bath

Dining Room next to Kitchen

3 Car Garage w. Carriage House (ADU) Above

Covered Front Porch Overlooking Park

Change it Up!

Basement Living Room / Bedroom / Bathroom

Local Shops / Restaurants within Walking Distance

Fun Stairs, Views and Landings

Zillow last checked:

Listing updated:

Listed by:

Michael Nirk 303-877-2082 mike@nhaspireco.com,

NextHome Aspire

Source: REcolorado as distributed by MLS GRID,MLS#: 9560556MLS Logo

Facts & features

Interior

Bedrooms & bathrooms
  • Bedrooms: 4
  • Bathrooms: 4
  • Full bathrooms: 2
  • 3/4 bathrooms: 1
  • 1/2 bathrooms: 1
  • Main level bathrooms: 1
Bedroom
  • Description: The Spacious Primary Suite Is A True Retreat, Featuring Rich Hardwood Floors, A Cozy Gas Fireplace And Walls Of Windows That Fill The Room With Natural Light. Thoughtfully Designed With Built-In Reading Lights On Both Sides Of The Bed, It Offers The Perfect Place To Relax And Recharge At The End Of The Day.
  • Features: Primary Suite
  • Level: Upper
Bedroom
  • Description: Light Bright And Airy Secondary Bedroom!
  • Level: Upper
Bedroom
  • Description: Light Bright And Airy Secondary Bedroom!
  • Level: Upper
Bedroom
  • Description: The Spacious Basement Bedroom Offers A Guest, Kid Or Renter Their Own Space.
  • Level: Basement
Bathroom
  • Description: Half Bath On The Main Perfect For Guests!
  • Level: Main
Bathroom
  • Description: The Luxurious Primary Bathroom Is Designed To Feel Like A Private Spa, Featuring Dual Vanities, An Expansive Walk-In Shower With Body Jets And A Steam Function And Separate His-And-Hers Walk-In Closets That Provide Exceptional Storage And Organization.
  • Features: En Suite Bathroom, Primary Suite
  • Level: Upper
Bathroom
  • Description: Who Doesn't Love A Pop Of Color And What Better To Brighten Your Day In The Secondary Bathroom!
  • Level: Upper
Bathroom
  • Description: Private And Brand New Bath!
  • Level: Basement
Bonus room
  • Description: Carriage House (Adu) 1 Bed / 1 Bathroom 576 Additional Finished Sqft Above Detached Garage
  • Level: Main
Dining room
  • Description: Perfectly Positioned Just Off The Kitchen, The Dining Room Offers An Inviting Setting For Everyday Meals Or Memorable Gatherings. Expansive Windows Frame Picturesque Views Of The Neighborhood Park, Mature Trees And Surrounding Greenery, Creating A Peaceful Backdrop For Every Occasion.
  • Level: Main
Family room
  • Description: The Basement Family Room Is Perfect Living Space For The Bedroom With It's Own Wet Bar.
  • Level: Basement
Kitchen
  • Description: The Heart Of The Home Is This Magazine-Worthy Kitchen, Where Vibrant Industrial Modern Custom Cabinetry, High-End Stainless Steel Appliances, Generous Prep Space, Gas Range And Designer Lighting All Come Together To Create An Unforgettable Culinary Experience.
  • Level: Main
Laundry
  • Description: Laundry Is Conveniently Located On The 2nd Floor With All The Bedrooms.
  • Level: Upper
Living room
  • Description: Designed For Both Entertaining And Everyday Living, The Light-Filled Living Room Showcases A Gas Fireplace, Walls Of Windows And Elegant French Doors That Open To A Picturesque Courtyard With A Soothing Water Feature. It's An Exceptional Space To Host Guests Or Simply Relax And Enjoy The Serenity Of Your Surroundings With Your Favorite Glass Of Wine.
  • Level: Main
Loft
  • Description: This Isn't Just A Loft, It's Your Very Own Speak Easy That Shares Access To The Expansive Rooftop Deck!
  • Level: Upper
Heating
  • Forced Air, Natural Gas
Cooling
  • Central Air
Appliances
  • Included: Bar Fridge, Convection Oven, Cooktop, Dishwasher, Disposal, Dryer, Gas Water Heater, Microwave, Oven, Refrigerator, Washer
Features
  • Audio/Video Controls, Built-in Features, Ceiling Fan(s), Central Vacuum, Entrance Foyer, Granite Counters, High Ceilings, High Speed Internet, Kitchen Island, Open Floorplan, Pantry, Primary Suite, Radon Mitigation System, Smoke Free, Sound System, Walk-In Closet(s), Wet Bar, Wired for Data
  • Flooring: Carpet, Concrete
  • Windows: Window Coverings
  • Basement: Finished,Full,Sump Pump,Unfinished
  • Number of fireplaces: 2
  • Fireplace features: Family Room, Gas, Insert, Master Bedroom
Interior area
  • Total structure area: 4,420
  • Total interior livable area: 4,420 sqft
  • Finished area above ground: 3,067
  • Finished area below ground: 1,153

Property

Parking
  • Total spaces: 6
  • Parking features: Concrete, Dry Walled, Exterior Access Door, Guest, Insulated Garage, Lighted, Oversized
  • Garage spaces: 3
  • Details: Reserved Spaces: 3
Features
  • Levels: Three Or More
  • Patio & porch: Covered, Front Porch, Patio, Rooftop
  • Exterior features: Balcony, Barbecue, Garden, Lighting, Private Yard, Rain Gutters, Water Feature
  • Fencing: Full
Lot
  • Size: 5,443 Square Feet
  • Features: Greenbelt, Irrigated, Landscaped, Level, Many Trees, Master Planned, Near Public Transit, Open Space, Sprinklers In Front
Details
  • Parcel number: R0141170
  • Special conditions: Standard

Construction

Type & style
  • Home type: SingleFamily
  • Property subtype: Single Family Residence
Materials
  • Frame
  • Foundation: Structural
  • Roof: Metal
Condition
  • Year built: 2001

Utilities & green energy

  • Sewer: Public Sewer
  • Water: Public
  • Utilities for property: Cable Available, Electricity Connected, Internet Access (Wired), Natural Gas Connected, Phone Available

Community & HOA

Community
  • Security: Carbon Monoxide Detector(s), Radon Detector, Smoke Detector(s), Video Doorbell
  • Subdivision: Prospect New Town
HOA
  • Has HOA: Yes
  • Amenities included: Park, Parking, Playground, Trail(s)
  • Services included: Reserve Fund, Snow Removal
  • HOA fee: $110 monthly
  • HOA name: Prospect HOA
  • HOA phone: 303-482-2213
Location
  • Region: Longmont

Financial & listing details

  • Price per square foot: $351/sqft
  • Tax assessed value: $1,305,400
  • Annual tax amount: $8,565
  • Date on market: 9/11/2026
  • Listing terms: 1031 Exchange,Cash,Conventional,Jumbo,VA Loan
  • Exclusions: Seller's Personal Property, Staging Furniture And Car Lift In Garage
  • Ownership: Individual
  • Electric utility on property: Yes
  • Road surface type: Alley Paved, Paved

Price history

DateEventPrice
9/11/2026Listed for sale$1,550,000-1.9%$351/sqft
Source: REcolorado as distributed by MLS GRID #9560556 Report a problem
8/22/2026Listing removed$1,580,000$357/sqft
Source: IRES as distributed by MLS GRID #1056681 Report a problem
6/30/2026Price change$1,580,000-0.9%$357/sqft
Source: IRES as distributed by MLS GRID #1056681 Report a problem
5/12/2026Price change$1,595,000-5.3%$361/sqft
Source: IRES as distributed by MLS GRID #1056681 Report a problem
4/16/2026Listed for sale$1,685,000+32.2%$381/sqft
Source: IRES as distributed by MLS GRID #1056681 Report a problem
5/2/2022Sold$1,275,000+49.1%$288/sqft
Source: Public Record Report a problem
2/24/2021Listing removed--
Source: Owner Report a problem
11/10/2020Listing removed$1,200
Source: Owner Report a problem
11/9/2020Listed for rent$1,200-47.8%
Source: Owner Report a problem
8/17/2020Sold$855,000-2.3%$193/sqft
Source: IRES as distributed by MLS GRID #916785 Report a problem
7/18/2020Pending sale$875,000$198/sqft
Source: Keller Williams Integrity Real Estate Llc #4600186 Report a problem
6/26/2020Listed for sale$875,000+59.1%$198/sqft
Source: Keller Williams Integrity Real Estate Llc #4600186 Report a problem
2/1/2013Sold$550,000-18.5%$124/sqft
Source: Public Record Report a problem
3/30/2011Listing removed$675,000$153/sqft
Source: Metro Brokers - Boulder #634175 Report a problem
2/2/2011Listed for sale$675,000$153/sqft
Source: Metro Brokers - Boulder #634175 Report a problem
1/31/2011Listing removed$2,300$1/sqft
Source: MB - Kearney Realty Co. Report a problem
1/1/2011Listing removed$675,000$153/sqft
Source: Metro Brokers - Boulder #634175 Report a problem
1/1/2011Listed for rent$2,300$1/sqft
Source: MB - Kearney Realty Co. Report a problem
12/20/2010Price change$675,000-3.6%$153/sqft
Source: Kearney Realty Co. #634175 Report a problem
7/14/2010Listed for sale$699,900+5.9%$158/sqft
Source: Kearney Realty Co. #634175 Report a problem
1/16/2002Sold$661,079+901.6%$150/sqft
Source: Public Record Report a problem
1/21/2000Sold$66,000$15/sqft
Source: Public Record Report a problem

Public tax history

YearProperty taxesTax assessment
2025$7,093 +1.4%$81,587 +4.8%
2024$6,996 +18.4%$77,834 -1%
2023$5,911 -1.3%$78,589 +31.6%
2022$5,987 -5.5%$59,728 -2.8%
2021$6,336 $61,447 -5.8%
2020$6,336 +27.2%$65,223
2019$4,982 $65,223 +24.4%
2018$4,982 $52,445 -9.5%
2017$4,982 -9.4%$57,980 +0.8%
2016$5,497 +4.9%$57,511 +49.8%
2015$5,239 +46.1%$38,383
2014$3,585 +2.4%$38,383
2013$3,499 +6.8%$38,383 +1.7%
2012$3,277 -32.6%$37,730
2011$4,865 +1.8%--
2010$4,777 +1.6%$56,510
2009$4,702 +31.9%$56,510 -12.2%
2007$3,564 -1.8%$64,370 +18.3%
2006$3,631 -9.1%$54,410
2005$3,996 +1.2%$54,410 -9.6%
2004$3,951 -8.4%$60,220
2003$4,315 +254.8%$60,220 +6.3%
2002$1,216 $56,660 -6.8%
2001-- $60,800

Find assessor info on the county website

Monthly payment

Est. payment
$8,838/mo
Principal & interest
$8043
Property taxes
$685
HOA Fees
$110
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Estimated market value

Not available

Estimated sales range

Not available

Not available

Climate risks

Explore flood, wildfire, and other predictive climate risk information for this property on First Street®️.

Neighborhood: Pike

Nearby schools

Burlington Elementary School
Grades PK-50.6 miles
5/10
GreatSchools® Rating
Test Score Rating
5/10
Student Progress Rating
5/10
Sunset Middle School
Grades 6-80.9 miles
6/10
GreatSchools® Rating
Test Score Rating
5/10
Student Progress Rating
6/10
Niwot High School
Grades 9-123.1 miles
10/10
GreatSchools® Rating
College Readiness Rating
10/10