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
Turning an ADU into a rental property means converting your extra space into a standalone apartment for tenants. This is a smart way to generate monthly income or help pay down your mortgage. You need this service if your local zoning allows for rental units and you have the extra square footage available.
Frequently asked in Columbia
What permits are required for an ADU in Columbia?
What are the rules for a backyard ADU?
What is an accessory dwelling unit?
An accessory dwelling unit (ADU) is a secondary, independent living space located on a single-family home lot. It includes its own kitchen, bathroom, and sleeping area. ADUs can be attached to the main house or be a separate detached structure. They offer flexible housing solutions for family members or as rental income properties in Columbia.
How do I find accessory dwelling unit builders near me?
What is an accessory dwelling unit contractor?
Are accessory dwelling unit grants available?
What is an accessory dwelling unit rental?
An accessory dwelling unit rental refers to leasing out an ADU as a separate living space. This provides an income stream for the property owner and offers more affordable housing options for tenants. The ADU must be a complete, self-contained unit with its own kitchen and bathroom. It's a popular way to maximize property utility.
Also serving nearby: O Fallon · Independence · Lee S Summit · St Louis · Kansas City
More on this: HUD ADU resources — ADU policy and financing research.
Service area details
Serving all of Columbia — population 129,330; about 1,921 residents per square mile across 67.3 sq mi. ZIP codes covered include 65201, 65202, 65203, 65205, 65211, 65212, 65215, 65216.
Neighborhoods served in Columbia: Downtown Columbia, The District, South Columbia, West Columbia, Rock Bridge — and every surrounding area.
Areas we serve
Browse by state, then city.
