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Highlands Ranch, CO ADU Homes for Sale

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Highlands Ranch, CO Adu Homes For Sale

No ADU homes are for sale in Highlands Ranch right now. Inventory for this search comes and goes, so the move is a saved search that fires the day one lists; Colorado homes with an ADU is the search to run in the meantime. Colorado homes with an ADU is the wider search. Call or text 303-955-4220. A live person answers.

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Homes With an ADU for Sale in Highlands Ranch, CO: What You Are Looking At

An ADU in Highlands Ranch is an accessory dwelling unit: a second, smaller home on the same lot, with its own kitchen, bathroom and entrance. It is a detached casita in the backyard, an apartment over the garage, or a basement apartment with a separate door. Buyers searching ADU homes for sale in Highlands Ranch also search casitas, carriage houses, garage apartments, mother-in-law suites and homes with rental income, and this page pulls all of them from the MLS. Homes with a finished ADU are rare in Highlands Ranch at any given moment, so the grid above is the live count and a Kenna agent adds the ADU-ready lots and the garage-apartment listings the public portals miss.

The Kenna Real Estate Group has sold Colorado homes since 2002 and shows ADU homes 7 days a week, and same day when the seller allows it. Call or text 303-955-4220. A live person answers.

What an ADU Does for a Highlands Ranch Buyer

  • Parents or adult sons and daughters next door, not down the hall. Full privacy on one property.
  • Rental income. A legal long-term rental in the ADU helps pay the mortgage on the main house. Short-term rental rules are set by the city and the HOA, so check them before you count on nightly income.
  • A home office, studio or guest house that does not eat a bedroom in the main home.
  • Resale. A permitted ADU is one of the few improvements in Highlands Ranch that adds more value than it costs, because two households can pay for one property.

Colorado's ADU Rules in Highlands Ranch

Colorado's 2024 ADU law (House Bill 24-1152) requires the larger Front Range cities and counties to allow one accessory dwelling unit on most single-family lots starting in mid-2025, and each city sets its own size, height, parking and owner-occupancy rules on top of that. Highlands Ranch sits in Douglas County, which has its own ADU regulations; read the Douglas County ADU rules for 2026 before you buy a lot to build on. An existing ADU still needs a permit and a certificate of occupancy to count as legal; ask for both.

What to Check Before You Buy an ADU Home in Highlands Ranch

  1. Permits and the certificate of occupancy. An unpermitted unit is a negotiating point for you and a disclosure problem later. A Kenna agent pulls the permit history during your review period.
  2. Separate entrance, kitchen and bath. That is what makes it a dwelling unit and not a finished basement.
  3. Utilities and address. A separate meter and a unit number make renting simple; a shared meter means a lease that splits the bill.
  4. HOA covenants. Covenants still control design, parking and rental terms. Read them before you offer.
  5. Financing. Conventional, FHA and VA loans all buy a home with an ADU, and some lenders count part of the ADU's rent toward your qualifying income. Ask before you shop.

Selling a Highlands Ranch Home With an ADU?

Buyers pay for a permitted, rentable unit and pay nothing extra for an illegal one. A free Smart Pricing Report prices the main house and the ADU from Highlands Ranch homes that actually sold, with three prices and the time frame for each. Call or text 303-955-4220.

ADU Homes Near Highlands Ranch

Highlands Ranch ADU Questions

What counts as an ADU in Highlands Ranch?

A separate living unit on the same lot with its own kitchen, bathroom, sleeping area and entrance, permitted by the city. A casita, a garage apartment and a walkout basement apartment all qualify when they are permitted.

Can I rent out the ADU?

Long-term rentals are allowed in most of the cities covered by the state law. Short-term rentals depend on the Highlands Ranch ordinance and the HOA. A Kenna agent checks both for the exact address before you offer.

Can I add an ADU to a Highlands Ranch home I buy?

On most single-family lots in the covered cities, yes, within the local size and setback rules. Buying the right lot is the whole game: alley access, a flat backyard and an existing detached garage cut the cost.

Can I see a Highlands Ranch ADU home today?

Yes. Showings run 7 days a week and same-day when the seller allows. Call or text 303-955-4220. A live person answers.

More for Highlands Ranch ADU Buyers

Kenna Real Estate Group at Keller Williams DTC · 6300 S Syracuse Way, Suite 150, Centennial · Call or text 303-955-4220. A live person answers, 7 days a week.

ADU for sale across Colorado

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Guides for this market

Want a tour or a price opinion on any home above? Call or text 303-955-4220. A live person answers. Not a robot, not a phone tree.

Questions Buyers Ask About ADU Homes in Highlands Ranch, Answered

Can I rent out the ADU on a home in Highlands Ranch?

Yes. Long-term rental of the ADU is the common plan. Denver dropped its owner-occupancy rule in the 2024 zoning update, and other Front Range cities have followed. Nightly rental is a separate matter: cities that allow it tie it to your primary residence and require a license. Before you write an offer, ask the seller for the ADU permit and the city's current rental rules for that address.

Is the ADU legal and permitted?

Check this first. A permitted ADU has a building permit and a final inspection on file with the city. An unpermitted basement apartment or garage conversion can be ordered removed, cannot be counted by an appraiser and can void insurance coverage. Ask the listing agent for the permit number. We pull the city record for you before you tour.

How big can an ADU be?

Denver caps a detached ADU at 1,000 square feet and 24 feet tall, placed in the rear 35 percent of the lot. Other cities set their own numbers, so confirm the limits for the specific lot before you plan an expansion. Our guide to Colorado ADU regulations lists the rules by city.

Will the ADU raise my property tax?

Yes. A permitted ADU adds assessed value. Colorado reassesses every two years in odd years, so the added value shows up at the next reassessment and not the day you close.

Can I finance a home with an ADU?

Yes. A conventional or FHA loan covers a home with an attached or detached ADU. Some lenders count projected rent from the ADU as qualifying income. Ask your lender for their ADU rental-income rule before you shop.

What do I inspect on an ADU?

Separate meters, a working heat source, egress windows, smoke and carbon monoxide alarms, a private entrance and water heater capacity. Ask for utility bills for the last 12 months so you see the real cost.

Want a tour of ADU homes in Highlands Ranch? Call or text 303-955-4220. A live person answers. The Kenna Real Estate Group sets up a search for you the same day and sends new matches the hour they list.

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