Energize Denver: Compliance Guide for Apartment Owners

Denver's Energize Denver ordinance requires apartment buildings of 25,000 square feet and larger to cut their energy use on a fixed schedule, and owners who start upgrading ahead of their target year protect both operating costs and resale value. This guide walks Colorado multifamily owners and investors through what the ordinance covers, which upgrades matter most, and how to pay for them.

What Is the Energize Denver Ordinance?

Energize Denver is a building performance policy administered by the City and County of Denver. It requires owners of covered buildings to report annual energy use through ENERGY STAR Portfolio Manager and reduce their building's energy use intensity (EUI) toward a target set for their property type, with interim compliance years leading up to a final deadline.

For an apartment owner, this means the building's actual energy performance is now public information and tied to a compliance timeline, not just a line item on a utility bill.

Which Apartment Buildings in Denver Have to Comply?

The ordinance applies to buildings at or above 25,000 square feet of gross floor area, which covers most mid-size and large apartment complexes across Denver. Smaller multifamily properties, duplexes, and fourplexes outside that threshold are not covered, though the same upgrades still lower their operating costs.

Owners who are not sure whether a specific address is covered should check the property's status directly with Denver's Climate Action, Sustainability and Resiliency office before budgeting a retrofit.

What Happens If an Apartment Owner Misses a Target Year?

Buildings that miss their EUI target face a compliance path set by the city, including an escalating fine structure for buildings that stay out of compliance. Owners who are buying a Denver apartment building should ask the seller for the property's benchmarking history and current compliance status as part of due diligence, the same way they would ask about a roof or a boiler.

Which Upgrades Cut Energy Use Fastest?

In an older Denver apartment building, the fastest EUI reductions come from a short, specific list of changes rather than a full gut renovation:

• LED lighting retrofits in common areas, hallways, and parking structures
• Smart or programmable thermostats in individual units
• Attic and rim-joist insulation, since heat loss through the roof is significant at 5,280 feet where nights cool fast even in summer
• Low-flow fixtures in kitchens and bathrooms
• ENERGY STAR certified appliances at turnover, replacing older refrigerators, dishwashers, and water heaters
• Building envelope air sealing around older window and door frames

Replacing an aging boiler with a high-efficiency system is the highest-cost item on this list, but it also produces the largest single EUI drop in a building that still runs on original mechanical equipment.

Do Xcel Energy Rebates Cover Multifamily Retrofits?

Xcel Energy runs rebate programs for Colorado multifamily property owners covering lighting, HVAC equipment, insulation, and common-area upgrades. Rebate amounts and eligible equipment change from year to year, so an owner planning a retrofit should confirm current program terms with Xcel Energy directly before ordering equipment, rather than budgeting off last year's numbers.

Nontoxic Paint and Flooring for Turnovers

Standard interior paint and carpet adhesive both release volatile organic compounds (VOCs) into the unit for weeks after installation. Low- and no-VOC paint and carpet are now widely available at the same price point as standard products, and using them at every turnover is one of the lowest-cost changes an owner can make. It also gives leasing staff a concrete, factual point to make with a prospective resident who asks about indoor air quality.

Water-Wise Landscaping Under Colorado's Water Restrictions

Denver Water and most Front Range utilities restrict outdoor watering days and hours during the growing season. Apartment complexes with large turf areas carry a real water bill exposure under those restrictions. Replacing high-water turf with xeriscaping, native grasses, and drip irrigation around common areas cuts both the water bill and the ordinance's landscaping-related energy load, since less irrigation also means less pump energy.

Does an Energy-Efficient Complex Rent Faster?

Lower utility bills are a direct selling point for a prospective resident comparing two similar units in the same Denver submarket. An owner who has completed LED, insulation, and low-flow upgrades has a factual, dollar-based reason a unit costs less to live in day to day, which is a stronger leasing argument than general appeals to sustainability.

Financing Green Upgrades When You Buy a Multifamily Property

An investor buying a Denver apartment building can, with some lenders and loan products, roll retrofit costs into the acquisition loan rather than paying for them separately after closing. Ask a lender about financing options specific to multifamily acquisitions before you write an offer, so the retrofit budget is part of the deal from day one instead of a surprise line item afterward.

Does Going Green Raise Appraised Value?

Lower verified operating costs directly support a higher net operating income (NOI) in a multifamily appraisal, since commercial and multifamily valuations are built on income, not just comparable sales. An owner who documents utility savings after a retrofit has real numbers to bring to an appraiser or a buyer at resale.

Permits and Metro District Rules

Denver requires permits for most mechanical, electrical, and structural work tied to an energy retrofit, including boiler replacement, solar installation, and major envelope work. Properties inside a metro district or an HOA-governed complex need design review approval before exterior changes such as solar panels or new landscaping move forward, so check both the city and the governing document before scheduling contractors.

Altitude, Hail, and Material Choices

Denver's intense UV exposure at altitude and its hail season, which runs spring through September, both shorten the life of standard roofing and exterior materials faster than in lower-elevation cities. Choosing impact-rated roofing and UV-stable exterior products during a retrofit cuts the number of times those upgrades need to be redone, which protects the return on the original investment.

Resale Value When You Sell a Front Range Multifamily Property

A buyer evaluating a Denver-area apartment complex will ask for two years of utility bills and the property's Energize Denver benchmarking history before making an offer, the same way a single-family buyer asks for an inspection report. A seller who has already completed the highest-value upgrades, documented the energy savings, and kept the building in compliance walks into that negotiation with real numbers instead of a general claim that the building is efficient.

Owners planning to sell within the next few years should start the retrofit and compliance work now rather than at listing time, since utility savings need at least a full billing cycle to show up clearly in the numbers a buyer's lender will want to see.

Where to go next

• Colorado Real Estate Investing Guide
• Colorado Duplex and Multifamily Buying Guide
• ADU vs Basement Apartment: The Smarter Move for Denver Investors
• Investment Property Loans in Denver
• What Should Denver Landlords Know About Winter Compliance Requirements
• Search every home for sale in Colorado

Talk to the Kenna Real Estate Group

The Kenna Real Estate Group helps Colorado investors find, evaluate, and close on multifamily and apartment properties across the Denver metro, including a review of a building's Energize Denver compliance status before you make an offer. Call or text 303-955-4220. A live person answers. Not a robot, not a phone tree. Or search every home for sale in Colorado to see current multifamily and investment listings.