Accessory Dwelling Unit Projects Rise Among Homeowners
Nearly a quarter of all renovation projects now include adding independent living space to family homes.
Updated on Oct. 26, 2026 in Home Renovation
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As of Q3 2026, accessory dwelling unit projects now account for 24 percent of all home renovations in the United States. This expansion of small, independent living spaces serves as a strategy to address the national housing shortage.
Why it matters
Homeowners are increasingly turning to accessory dwelling units because remodeling activity remains less sensitive to elevated interest rates than new home construction. This shift reflects a sustained commitment to property improvement despite broader economic conditions.
The share of projects creating accessory dwelling units climbed from 18 percent in 2019 to 24 percent in 2026. Currently, over 62 percent of these developments require budgets of $150,000 or more, up significantly from the 28 percent reported in 2019.
The players
National Association of Home Builders
A major trade association that advocates for housing policy and tracks industry health through its Remodeling Market Index.
The details
Homeowners increase their footprint for accessory dwelling units by either building new external additions or converting existing internal floor space into independent living quarters. As costs rise, lenders use metrics like the Kukun Renovation HELOC Index to track the market and offer equity-based financing products to fund these significant investments.
Timeline
Q1 2019 marked the baseline survey for accessory dwelling unit project share.
Q3 2025 saw the National Association of Home Builders index at a value of 60.
Q2 2026 recorded a National Association of Home Builders index value of 61.
Q3 2026 serves as the period for the most recent Remodeling Market Index report.
The Home Front
The rise in accessory dwelling units aligns with a broader shift in how families leverage their equity to address space needs amidst limited housing inventory. This trend tracks alongside the National Association of Home Builders Remodeling Market Index, which hit 62 in the third quarter of 2026.
If you are considering an accessory dwelling unit, assess your current property equity and discuss project scope with a licensed general contractor. Given the high cost of recent projects, ensure your budget accounts for potential construction increases before finalizing financing plans.
The takeaway
Accessory dwelling units are becoming a primary vehicle for home expansion as owners prioritize remodeling over new construction. Track your local permitting requirements and consult with a licensed professional to determine if your property layout supports an independent living space.
Further reading
For more on managing major property upgrades, visit our Home Renovation section.
Source note: This article includes information reported by National Mortgage News.
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