Check Availability
$5,395,000
● House - For Sale

643 Mapleton Ave

Boulder, CO 80304
bedrooms
4 Beds
bathrooms
2 Baths
square feet
3,239 Ft²
$28,060
Est. Monthly
0.35%
Cap Rate

About This Property

Seller Financing Available. The beautifully preserved past meets the exciting present in this carefully updated and diligently maintained historic Mapleton Hill home. This fine Boulder 4BD/3BA landmark awaits its next generation of lucky residents with an expansive modernized layout, a wealth of original and period-appropriate architectural details, and phenomenal poolside outdoor space. Built in 1895, The Law House is a Gothic Revival masterpiece built from stone quarried from Mt. Sanitas. Inside, you'll find tall tin ceilings, original fir floors, stained glass windows and exceptional millwork paired with thoughtfully selected lighting, windows and doors, Cleveland Art and Antiques handblown light fixtures and Sonos speakers. A charming covered porch and gracious foyer open to a sun-kissed layout perfect for peaceful relaxation and lavish entertaining, including a fireplace living room, elegant formal dining room and a stately library with breathtaking woodwork, a Murphy bed and a hidden passageway to both the lower and upper levels. The open gourmet kitchen boasts a skylight, custom cabinetry, honed raw-edge Australian granite and upscale appliances, while an adjacent guest bath and laundry room add convenience. Grill masters will love the large deck's Lynx summer kitchen. Below, the newer saltwater jetted pool spa is surrounded by manicured gardens and tall trees for optimal privacy. A handsome fir staircase leads to the upper-level private quarters, including a luxurious owner's suite with a spa bath and walk-in closet. Two secondary bedrooms & a full bath complete the top floor, while the walkout basement provides a vast footprint for media room, home gym & game room use. Completely remodeled in 2006, the home includes upper-level HVAC and mini-split/radiant heat on the main and lower levels. Plans are available for a primary bathroom and closet remodel and a basement expansion with a depth increase. Coveted Mapleton Hill Historic District close to EVERYTHING.
Unit Size
3,239 Ft²
Days on Market
-
Land Size
0.15 acres
Price per sqft
$1,666
Property Type
House
Property Taxes
$1,569
HOA Dues
-
Year Built
1900

Listed By

Patrick Brown
Compass - Boulder

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Cap Rate Calculator

Last updated: 11 months ago (IRES MLS #1044438)

Price History

Date / Event Date Event Price
Oct 3, 2025 No longer available -
No longer available
Sep 25, 2025 Listed by Coldwell Banker Realty 02 $5,395,000
Listed by Coldwell Banker Realty 02
Sep 18, 2025 Withdrawn -
Withdrawn
Feb 19, 2025 Listed by Coldwell Banker Realty 02 $5,800,000
Listed by Coldwell Banker Realty 02
Seller Financing Available. The beautifully preserved past meets the exciting present in this carefully updated and diligently maintained historic Mapleton Hill home. This fine Boulder 4BD/3BA landmark awaits its next generation of lucky residents with an expansive modernized layout, a wealth of original and period-appropriate architectural details, and phenomenal poolside outdoor space. Built in 1895, The Law House is a Gothic Revival masterpiece built from stone quarried from Mt. Sanitas. Inside, you'll find tall tin ceilings, original fir floors, stained glass windows and exceptional millwork paired with thoughtfully selected lighting, windows and doors, Cleveland Art and Antiques handblown light fixtures and Sonos speakers. A charming covered porch and gracious foyer open to a sun-kissed layout perfect for peaceful relaxation and lavish entertaining, including a fireplace living room, elegant formal dining room and a stately library with breathtaking woodwork, a Murphy bed and a hidden passageway to both the lower and upper levels. The open gourmet kitchen boasts a skylight, custom cabinetry, honed raw-edge Australian granite and upscale appliances, while an adjacent guest bath and laundry room add convenience. Grill masters will love the large deck's Lynx summer kitchen. Below, the newer saltwater jetted pool spa is surrounded by manicured gardens and tall trees for optimal privacy. A handsome fir staircase leads to the upper-level private quarters, including a luxurious owner's suite with a spa bath and walk-in closet. Two secondary bedrooms & a full bath complete the top floor, while the walkout basement provides a vast footprint for media room, home gym & game room use. Completely remodeled in 2006, the home includes upper-level HVAC and mini-split/radiant heat on the main and lower levels. Plans are available for a primary bathroom and closet remodel and a basement expansion with a depth increase. Coveted Mapleton Hill Historic District close to EVERYTHING.
Sep 15, 2024 Listed $5,800,000
Listed
The beautifully preserved past meets the exciting present in this carefully updated and diligently maintained historic Mapleton Hill home. This fine Boulder 4BD/3BA landmark awaits its next generation of lucky residents with an expansive modernized layout, a wealth of original and period-appropriate architectural details, and phenomenal poolside outdoor space. Built in 1895, The Law House is a Gothic Revival masterpiece built from stone quarried from Mt. Sanitas. Inside, you'll find tall tin ceilings, original fir floors, stained glass windows and exceptional millwork paired with thoughtfully selected lighting, windows and doors, Cleveland Art and Antiques handblown light fixtures and Sonos speakers. A charming covered porch and gracious foyer open to a sun-kissed layout perfect for peaceful relaxation and lavish entertaining, including a fireplace living room, elegant formal dining room and a stately library with breathtaking woodwork, a Murphy bed and a hidden passageway to both the lower and upper levels. The open gourmet kitchen boasts a skylight, custom cabinetry, honed raw-edge Australian granite and upscale appliances, while an adjacent guest bath and laundry room add convenience. Grill masters will love the large deck's Lynx summer kitchen. Below, the newer saltwater jetted pool spa is surrounded by manicured gardens and tall trees for optimal privacy. A handsome fir staircase leads to the upper-level private quarters, including a luxurious owner's suite with a spa bath and walk-in closet. Two secondary bedrooms and a full bath complete the top floor, while the walkout basement provides a vast footprint for media room, home gym and game room use. Completely remodeled in 2006, the home includes upper-level HVAC and mini-split/radiant heat on the main and lower levels. Plans are available for a primary bathroom and closet remodel and a basement expansion with a depth increase. Coveted Mapleton Hill Historic District location close to trails and Downtown.
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Property Highlights

Garage
Air Conditioning
Fireplace
Parking Details
Has Garage
Attached Garage
Parking Features: Garage Door Opener
Garage Spaces: 2
Interior Details
Full Bathrooms: 2
Interior Features: Eat-in Kitchen, Open Floorplan, Walk-In Closet(s), Wet Bar, Kitchen Island, Beamed Ceilings, Crown Molding, Study Area, Separate Dining Room, Cathedral/Vaulted Ceilings, Steam Shower, 9ft+ Ceilings
Appliances: Self Cleaning Oven, Dishwasher, Refrigerator, Bar Fridge, Washer, Dryer, Freezer, Disposal, Gas Range/Oven
Flooring Type: Wood Floors
Laundry Features: Washer Hookup, Main Level
Has Fireplace
Fireplace Features: Free Standing, Gas, Living Room, Basement, 2+ Fireplaces
Basement: Partially Finished, Walk-Out Access
Exterior Details
Square Footage: 3239
Square Footage Source: $0
Property Condition: Not New, Previously Owned
Architectural Style: Victorian
Year Built: 1900
Building Area Total: 3239
Levels: Two
Other Structures: Kennel/Dog Run
Window Features: Window Coverings, Wood Frames, Bay Window(s), Skylight(s)
Construction Materials: Stone, Wood Shingle
Patio and Porch Features: Patio, Deck, Enclosed
Pool Features: Private
Pool is Private
Lot Features: Corner Lot, Wooded, Level, Sidewalks, Lawn Sprinkler System, Historic District
Lot Size Area: 6332
Lot Size Units: Square Feet
Lot Size Acres: 0.15
Lot Size Square Feet: 6332
Water Source: City Water, City of Boulder
Financial Details
Tax Annual Amount: $18,826
Utilities Details
Cooling Type: Central Air, Wall/Window Unit(s)
Heating Type: Forced Air, Hot Water, Wood Stove, Zoned, Radiant, Radiator, 2 or more Heat Sources
Sewer : City Sewer

Building Info

Overview

    General

  • Year Built: 1900
  • Effective Year Built: 1995
  • Building Count: 1
  • Total Rooms: 9
  • Bedroom Count: 4
  • Bathroom Count: 3
  • Full Bathrooms: 2
  • Partial Bathrooms: 3
  • Building Condition: 7
  • Building Quality: 4
  • Construction Type: 12
  • Building Style: 0
  • Exterior Walls Type: 23
  • Interior Walls Type: 6
  • Roof Shape Type: 0
  • Roof Cover Type: 15
  • Floor Count: 200
  • Living Units: 1
  • Floor Cover: 0
  • Basement Type: 1
  • Basement Area: 687
  • Garage Type: 1
  • Garage Square Area: 279
  • Parking Space Count: 1
  • Patio Type: 20
  • Porch Type: 8
  • Pool Type: 0

    Dimensions

  • Lot Size Square Feet: 6,332
  • Total Building Area: 4,205
  • Gross Building Area: 4,205
  • Building Area: 3,239
  • Building Area Measurement: L

    Heating and Cooling

  • Air Conditioning: 0
  • Heating: 10
  • Heated Square Feet: 3,239
  • Heating Fuel Type: 0

    Utilities

  • Sewer System: 0
  • Water Service: 0

Building

  • Building Type: 0
  • Property Class: R
  • Subdivision: MAPLETON - BO
  • Land Acres: 0000000145
  • Standard Land Use Code: 1001
  • County Land Use Code: 1112
  • Legal Description 1: S 3/4 LOTS 33-34 BLK 3 MAPLETON

Neighborhood

  • School District Name: Boulder Valley School District RE-2
  • Census Tract: 012101

Geography

  • Assessors Map Reference: B17-F
  • Account Number: R0008802
  • Parcel: R0008802
  • Block: 3
  • Lot: 33
  • Meridian: SEC 25 TWN 1N RNG 71
  • Municipality: BOULDER
  • Latitude: 40.0208
  • Longitude: -105.288

    Address

  • Full Address: 643 Mapleton Ave
  • Address - House Number: 643
  • Address - Street Name: Mapleton
  • Address - Suffix Type: Ave
  • State: CO
  • City Name: Boulder
  • Carrier Code: C004
  • 4-Digit Zip Code: 3989
  • Zip Code: 80304

Valuation

    Tax

  • Tax Year: 2022
  • Tax Amount: $1,635,780
  • Initial Tax Delinquent Year: 2021
  • Tax Rate Code Area: 00-010

    Appraisal Valuation

  • Standard Deviation: 0.1483
  • Valuation Date: May 17, 2023
  • Confidence Score: 82
  • Final Value: 3,930,917
  • High Value: 4,513,873
  • Low Value: 3,347,962

    Market Valuation

  • Market Total Value: $3,252,200
  • Market Land Value: $1,549,800
  • Market Improvement Value: $1,702,400

    Assessments Valuation

  • Assessed Year: 2023
  • Assessed Total Value: $220,011
  • Assessed Land Value: $104,844
  • Assessed Improvements Value: $115,167

    Sales

  • Current Sale Contract Date: Jan 03, 2006
  • Current Sale Recording Date: Jan 05, 2006
  • Current Sale Price:
  • Current Sale Document Type: 71
  • Current Sale Input Document Number: 2748971
  • Previous Sale Recording Date: Dec 18, 1975
  • Previous Sale Contract Date: Dec 18, 1975
  • Previous Sale Amount: $78,000
  • Previous Sale Document Type: 27
Data used for valuation calculations is provided by RealtyHop, and other third party sources

Comparables

Unit
Status
Type
Beds
Baths
ft²
Price/ft²
Asking Price
Listed On
Closing Price
Sold On
HOA + Taxes

About Central Boulder


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Frequently Asked Questions

When was property at 643 Mapleton Avenue built and last sold?
The property at 643 Mapleton Avenue was built in 1900 and last sold on Jan 3, 2006 for $1,167,500.
How much is this home worth?
The estimated value of the home located at 643 Mapleton Avenue is $5,310,770.
What are some comparable homes to 643 Mapleton Avenue?
There are currently no comparable homes to 643 Mapleton Avenue.