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403 W William StreetSuperior, CO 80027

For Sale

$2,400,000

Smart Buyer Rebate $24,000

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!

Listed by Tommy Lorden

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License #IRP24342

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Buyers' Slice Realty

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303-376-6111

Last updated March 15, 2026

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Source: REcolorado #IR1053262

Listing Facts

  • TypeSingle-family
  • NeighborhoodSuperior
  • Bedrooms7
  • Bathrooms7
  • Days on Prevu8
  • Taxes$9,899/year
  • Size5,185 sqft
  • Price per sqft$463

Amenities

  • Dishwasher
  • Private Outdoor Space
  • Washer/Dryer
  • Air Conditioning
  • Parking

Location

Mortgage Calculator

Listing History

03/15/2026
Status changed to Active
$2,400,000
03/07/2026
Listed by Buyers' Slice Realty
$2,400,000

Property Details for 403 W William Street

Exterior

Construction

  • Roof: Composition
  • Structure Type: House
  • Window Features: Double Pane Windows, Window Coverings
  • Year Built: 2023
  • Construction Materials: Metal Siding, Frame
  • Exterior Features: Balcony, Spa/Hot Tub

Features

  • Direction Faces: South
  • Fencing: Fenced
  • Patio And Porch Features: Patio
  • View: Mountain(s), Plains

Measurements

  • Building Area Total: 5,291
  • Lot Features: Corner Lot, Level, Sprinklers In Front
  • Lot Size Acres: 0.16
  • Lot Size Square Feet: 6,884

Financial

Taxes

  • Parcel Number: R0617502
  • Tax Annual Amount: $9,899.00
  • Tax Year: 2025

Interior

Features

  • Appliances: Bar Fridge, Dishwasher, Dryer, Microwave, Oven, Refrigerator, Washer
  • Fireplace Features: Gas, Living Room
  • Interior Features: Eat-in Kitchen, In-Law Floorplan, Open Floorplan, Pantry, Smart Thermostat, Walk-In Closet(s), Wet Bar

Measurements

  • Living Area: 5,185

Rooms

  • Has Basement: Yes
  • Bathrooms Full: 5
  • Bathrooms Half: 1
  • Bathrooms Three Quarter: 1
  • Bathrooms Total Integer: 7
  • Bedrooms Total: 7
  • Main Level Bathrooms: 2

Other

General

  • Exclusions: Seller's personal property.

Location

  • Subdivision Name: Superior West

Parking

Parking

  • Attached Garage: Yes
  • Garage Spaces: 2
  • Parking Total: 2

Schools

Elementary School

  • Elementary School: Monarch K-8
  • Elementary School District: Boulder Valley RE 2

High School

  • High School: Monarch
  • High School District: Boulder Valley RE 2

Middle or Junior School

  • Middle Or Junior School: Monarch K-8

Utilities

Equipment

  • Cooling: Air Conditioning-Room, Central Air
  • Heating: Forced Air, Heat Pump
  • Sewer: Public Sewer
  • Utilities: Electricity Available, Natural Gas Available
  • Water Source: Public

Frequently Asked Questions

How many bedrooms and bathrooms does this single-family home have?

There are 7 bedrooms and 7 bathrooms in this single-family home at 403 W William Street.

What schools are nearby to 403 W William Street?

Nearby schools include the Monarch K-8 Elementary School, Monarch K-8 Middle School, and Monarch High School.

Does this single-family home have parking?

Yes, there are 2 parking spaces available for 403 W William Street.

What are the annual taxes for 403 W William Street?

Annual taxes for this single-family home are estimated at $9,899.

How does 403 W William Street compare to other single-family homes in Superior?

This single-family home is listed 141% above the average price for single-family homes in Superior and has been on the market for 146 less days than the typical home in this area.

What is the square footage on this single-family home?

According to the MLS, this listing is 5,185 sqft.

403 W William Street is a 7-bedroom, 7-bath single-family home for sale in Superior CO 80027. Listed on Prevu for 8 days at $2,400,000. This home features 5,185 square feet of living space, located in Superior. The median listing price for single-family homes in this area is $877,450. Nearby schools include Monarch K-8 Elementary School, Monarch K-8 Middle School, and Monarch High School. Additional amenities include private outdoor space, dishwasher, air conditioning, parking, and washer/dryer. Browse more single-family home listings in Colorado.

The content relating to real estate for sale in this Web site comes in part from the Internet Data eXchange ("IDX") program of METROLIST, INC., DBA RECOLORADO® Real estate listings held by brokers other than Prevu are marked with the IDX Logo. This information is being provided for the consumers' personal, non-commercial use and may not be used for any other purpose. All information subject to change and should be independently verified.

Full MLS Disclaimers

Rebate estimate is indicative only and based on listing price and estimated buyer's agent commission paid by owner, if applicable. Final rebates are subject to Terms of Use and may vary due to final negotiated transaction terms.