Can an ADU ever reduce your buyer pool?
While many buyers see flexibility and income opportunity, others may view an ADU as unnecessary or worry about tenant management or upkeep. In lower-priced neighborhoods, there’s also a risk of overimprovement, where the ADU pushes your property above what typical buyers in the area can afford.
HOA restrictions, local zoning rules, or short-term rental bans can also reduce perceived value.
Frieis says another buyer turnoff is when the ADU was built poorly or without considering its impact on the rest of the property.
“Be certain you have a separate entrance, and that there’s enough space for parking. People often forget that with an ADU you need additional parking spaces,” advises Freis.
How to price a home with an ADU
One common mistake sellers make is simply adding construction costs to their home’s previous estimated value. For example, according to Angi, most homeowners adding an accessory dwelling unit spend between $40,000 and $360,000 to build their ADU, with a national average of $180,000.
But if your home was worth $500,000 before you built an ADU, you can’t simply add $180,000 to its value and call it a $680,000 property. As noted above, an accepted value-boost estimate is 30%. Hence, your $500,000 home might now be worth $650,000.
For comparison, here is a look at typical ADU cost ranges:
| Accessory dwelling unit type | Average cost range |
|---|---|
| Basement conversion | $60,000–$150,000 |
| Garage conversion | $60,000–$150,000 |
| Attached new construction | $100,000–$216,000 |
| Above-garage construction | $128,000–$225,000 |
| Detached new construction | $110,000–$285,000 |
If you’ve added an ADU, your pricing decisions should be based on:
- Recent comparable sales (comps) with ADUs
- The size and quality of the unit
- Rental income documentation
- Overall neighborhood price trends
Some agents price slightly above similar homes without ADUs to test the premium. Others anchor pricing to the most relevant ADU comp available.
“We’ll look at comparable, recently sold homes in the neighborhood and total square footage,” says Freis. “If it’s an ADU that was built with permits, then we’ll [use the permit information] to look for a home with an ADU that’s built about the same.”
He adds that they can also consult with developers in other areas that build homes with ADUs.
Strategic marketing can also play a role in your list price. An experienced agent will know how to highlight your property’s flexibility, whether for rental income, guests, or multigenerational living.
Should you build an ADU right before selling?
If you’re considering adding an ADU solely to boost resale value, timing is important.
Construction can take months, and costs have risen in many markets. While ADUs can increase value, they are rarely a quick flip strategy.
In general, building an ADU makes the most financial sense if you:
- Plan to use it for several years
- Benefit from rental income
- Live in a high-demand ADU market
If you’re already preparing to list, it’s usually better to focus on pricing and presentation rather than taking on a major construction project.
An ADU can boost value, but it’s market-specific
An accessory dwelling unit can absolutely increase your home’s resale value. In the right market, it may be one of the most attractive features on your property.
But the payoff depends on local demand, build quality, permits, and pricing strategy. Before setting your list price, gather local comps, document rental income if applicable, and speak with an experienced agent who understands how ADUs are valued in your area.
HomeLight can connect you with a top-rated local agent familiar with what buyers are looking for in your market, whether that’s an ADU, an outdoor kitchen, a media room, or a home office. Our free Agent Match tool analyzes over 27 million transactions and thousands of reviews to determine which agent is best for you based on your needs.
Header Image Source: (iriana88w / Deposit Photos)
