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265 31st St, Boulder, Colorado

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Added On:05/08/2025

Last Updated:05/18/2025

A NET ZERO ENERGY, GREEN HOME IN SOUTH BOULDER, COLORADO

Green HomeHealthy HomeNatural HomeSustainable HomeEnergy Efficient HomeSolar PanelsPassive SolarNet Zero

$1,495,000Asking Price (USD)

$5,244Annual Property Tax

2,349Square Feet

4 / 2Beds / Baths

7148.00 sqftLot Size

1985Year Built

$0Annual Power Consumption

Single Family HomeProperty Type

Insulation

Walls

R-Value: 24
Main Level Bedrooms - spray foam insulation could be blown into the wall cavities, resulting in R-24.5 insulation in the exterior walls

Mortgage Calculator

Purchase Price ($)Down Payment

Loan Amount

$1,196,000

Annual Interest Rate

Loan Term (years)

Estimated Monthly Mortgage Payment

$8,609.65

Key Green Features

Passive Solar

NET ZERO

Eco-Friendly Materials

FSC Certified Wood

Where was this used? Framing

Energy Sources

solar

Output: 3kw

Year installed: 2010

Flush-mounted Active Solar array (Owned, not Leased)

solar water heating

Output: 11kw

Year installed: 2010

This home has a drainback solar hot water system consisting of two 4’ x 10’ roof-mounted collector panels, stainless steel water pumps, a heat exchanger, and 120 gallons of super insulated hot water storage. The system provides 100% of our domestic hot water needs for 8 months of the year, and 80% to 90% of it.

Property Description

"Form Marries Function" in this stunning, award-winning* home designed / built by a former National Renewable Energy Laboratory solar expert. Rooftop solar photovoltaic panels provide home's (free) electricity & rooftop solar thermal panels produce 150 degree (free) hot water. Plus, passive solar design captures free, zero-carbon heat from the winter sun & storesit in thermal mass. (Toasty radiant floor heat serves as a backup in winter.) Precisely-designed roof overhangs provide shade & natural cooling all summer (backed up by super-chilled energy-efficient evaporative cooling). Brilliant natural daylighting permeates the home.Main level features 2 bedrooms, a bathroom, a wet bar, and a 100% soundproof 'flex room' - a home theater/entertainment room, music rehearsal room, workout studio, or 5th bedroom. 2nd floor features spacious vaulted ceilings above an open floorplan living room/kitchen, 2 generous bedrooms, and another bathroom. A huge 300 sq ft 2nd floor deck provides breathtaking Flatirons views.Enchanting, Santa Fe Style interior features curves, arches, built-in's, custom tile, and Knotty Pine doors, cabinets & beautiful, hand-made wood baseboards, door & window trim. Custom accent lighting throughout, for showcasing artwork.The home features above-code insulation, high-efficiency double pane windows &premium, insulating cellular shades. (Plus dozens more energy features.) Attached two-car carport protects vehicles. 3 backyard storage sheds / workshops, garden boxes & cherry trees complete this magical home in a great neighborhood near amenities and trails. YES! *Awards from City of Boulder, Boulder County, & Colorado Renewable Energy Society.* 

Home Energy Evaluation

Glazing: Dual-Paned Windows

Installed Appliances:

High Efficiency Air-Conditioner

Air Sealed: No

Energy-Star Appliances: N/A

Tankless Water Heater Installed: No

Home Health Evaluation

Water Purity: no

Air Purity: no

Radon Test Date: June, 2019

Wall Finishes: Low VOC Paint, Unfinished: Wood

Energy Cost Breakdown

Other

Value: 0 Description: Passive Solar Design Active Solar Array (3 Kilowatts) Solar Hot Water

Property Website

Website: https://www.iresis.com/cwa/link/listing?llid=yw5ccxkdjvl&lid=1336789&single

Contact Seller

Listing ID : 24757