Cost to build accessory dwelling unit — Fishers, IN
Last updated: September 24, 2026
What affects the price
Building an ADU is a major project, and the final bill depends on a few key things. Site prep is a big factor; if your land is sloped or needs extensive utility connections, costs go up. The materials you choose—from siding to kitchen finishes—also change the math significantly. Whether you’re building a detached unit or converting an existing garage shifts the permit requirements and structural work needed. We provide exact pricing confirmed free on the call.
About this service
Building an ADU involves costs for permits, site prep, foundation, framing, plumbing, and electrical work. Prices fluctuate based on whether you choose a custom design or a pre-planned layout, as well as the complexity of connecting to existing city utilities. Exact pricing confirmed free on the call.
Frequently asked in Fishers
What are 'homes with in-law suites' in Fishers?
'Homes with in-law suites' in Fishers typically refer to properties that already have a self-contained living space attached or on the property. This could be a basement apartment, a detached garage conversion, or a purpose-built suite. Adding one can increase your home's functionality and value. We can help you assess your options.
How do I find local ADU services in Fishers?
What's involved in accessory dwelling unit rental in Indiana?
What is an ADU unit in Fishers?
An ADU unit in Fishers is a secondary housing unit on a single-family home lot. It can be attached to the main house, like a basement apartment or an addition, or it can be a detached structure, such as a backyard cottage. These units provide independent living spaces. We can help you plan yours.
How do I get an ADU quote in Fishers?
What is the cost of an accessory dwelling unit in Indiana?
What is an accessory dwelling unit?
An accessory dwelling unit (ADU) is a secondary housing unit on a single-family residential lot. It provides independent living quarters with its own kitchen, bathroom, and sleeping area. ADUs can be attached to the primary home or exist as a separate structure on the property. We can help you build one.
Also serving nearby: Carmel · Fort Wayne · Dayton · Cincinnati · South Bend
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Fishers — population 104,094; about 2,887 residents per square mile across 36.1 sq mi. ZIP codes covered include 46037, 46038, 46085.
Neighborhoods served in Fishers: Cheeney Creek, Oak Creek, Flat Stone, Windsor Grove, Deer Crossing — and every surrounding area.
Areas we serve
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