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Superior, CO 80027 403 W William St

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  • MLS# 1053262
  • 03/07/2026
  • Request Tour
  • Request Info
  • Beds • 7
  • Full/Half Baths • 6 / 1
  • Garage • 2

Home Details

Welcome to this stunning custom home offering walkable convenience and refined living, complete with a finished basement and fully independent ADU. Move-in ready with designer blinds and mature landscaping. Step out the back door to Whole Foods, Super Target, the McCaslin RTD station, and the newly rebuilt Founder's Park. From the front, enjoy Downtown Superior and miles of open space trails. Located on a corner lot, the home features an open floor plan, seamless indoor-outdoor living, and mountain views. Generous rooms, sweeping windows, and 10-foot ceilings throughout fill the home with natural light. The main level includes rich wood flooring, a great room with fireplace, and a chef's kitchen that includes a large island and striking countertops. Between the home and garage, a secluded landscaped courtyard patio with privacy fencing creates a blissful outdoor retreat. A custom floating staircase leads to two spacious upstairs bedrooms that are in addition to the primary suite---each with its own bath, plus a laundry room and sitting area opening to a covered balcony. The primary suite offers a five-piece bath with soaking tub, Porcelanosa-tiled walk-in shower, and expansive walk-in closet. A main-level ensuite bedroom provides flexible living and use options. The finished basement adds a rec room, wet bar, gym space, and two bedrooms.The detached two-car garage includes a finished ADU with bedroom, bath, full kitchen, washer/dryer, and balcony---ideal for guests, office, or rental use. Extras include fire sprinkler suppression system, indoor and outdoor EV charging, and hot tub. Turnkey home with quick access to Highway 36, Boulder, Denver, and DIA!
Presented By: ;

Interior Features for 403 W William St

Bedrooms

Total Bedrooms7

Bathrooms

3/4 Baths1
Half Baths1
Total Baths7

Other Interior Features

LivingAreaSourceOther
Above Grade Finished Area3155
BasementPartially Finished
Below Grade Finished Area1534
Fireplace FeaturesGas, Living Room
Interior AmenitiesEat-in Kitchen, Open Floorplan, Pantry, Walk-In Closet(s), Wet Bar
Window FeaturesWindow Coverings

General for 403 W William St

AppliancesGas Range, Dishwasher, Refrigerator, Bar Fridge, Washer, Dryer, Microwave
Architectural StyleIn-Law Area
AttributionContact3033766111
Builder NameColson Builders
CitySuperior
Construction MaterialsFrame, Metal Siding, Composition
CoolingCentral Air, Wall/Window Unit(s)
CountyBoulder
DisclosuresSeller's Property Disclosure
ElectricXcel
Elementary SchoolMonarch
Energy EfficientWindows, High Efficiency Furnace, Thermostat
ExclusionsSeller's personal property.
Expected Active Date 2026-03-15
Full Baths5
Garage Spaces2
HOANo
HeatingForced Air, Heat Pump
High SchoolMonarch
High School DistrictBoulder Valley Dist RE2
LevelsTwo
Living Area5185
MLS AreaSuperior
Middle/Junior High SchoolMonarch
New ConstructionNo
Parcel NumberR0617502
Patio/Porch FeaturesPatio
Possible UseSingle Family, Multi-Family, Additional Units
Property Attached Y/NNo
Property SubtypeMixed Use
Property TypeResidential
RoofComposition
Security FeaturesFire Sprinkler System, Fire Alarm
SewerPublic Sewer
Standard StatusActive
StatusActive
Subdivision NameSuperior West
Tax Annual Amount9899
Tax Year2025
UtilitiesNatural Gas Available, Electricity Available
ViewMountain(s), Hills, Plains View
Year Built2023
ZoningRL

Exterior for 403 W William St

Builder Modelcustom
Exterior AmenitiesSprinkler System, Balcony, Hot Tub, Carriage House
FencingFenced, Wood
Irrigation Water Rights Y/NNo
Lot FeaturesCorner Lot, Level, House Faces South, Street Light, Alley
Lot Size Acres0.16
Lot Size Area6884
Parking FeaturesAttached
Water SourceCity
Waterfront Y/NNo

Additional Details

Price History

Schools

High School Monarch High School
Middle School Monarch Middle School
Elementary School Monarch Elementary School

Nathan Washam

Broker/Owner
Price $2,400,000
MLS#1053262
List Date 03/07/2026
Property Type Single Family
Phone 970.988.8295
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