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Home/Services/Garage Conversion & ADU

Garage Conversion & ADU Construction in Prescott, AZ

Get a Free Estimate Call 928-800-1998
Garage Conversion & ADU Prescott, AZ

Turn Your Garage Into Living Space — Or Build an ADU

An accessory dwelling unit (ADU) is a self-contained living space located on the same lot as a primary residence. It can be an attached or detached structure, a converted garage, or an internal conversion. A garage conversion repurposes your existing attached or detached garage into fully conditioned, finished living space — without adding to your footprint. Both are among the most cost-effective ways to add usable square footage to your Prescott property.

Demand for ADUs and garage conversions in the Prescott area has grown sharply in recent years. Prescott's rental market is tight, and a well-finished ADU can generate between $1,200 and $1,800 per month in long-term rental income — enough to cover a significant portion of the project cost within just a few years. Multigenerational families are also converting garages to give aging parents or adult children a private, independent space without the cost of a second property. And with Prescott's thriving short-term vacation rental market, a converted garage or detached ADU can perform as a productive Airbnb or VRBO listing during peak tourism months.

Infinity Kitchen and Bath offers a complete design-build service for garage conversions and ADUs in Prescott and throughout Yavapai County. We handle everything in-house: architectural drawings, permit applications, structural work, HVAC, plumbing, electrical, insulation, drywall, flooring, and all finish selections. You work with one team from the first consultation through the final Certificate of Occupancy.

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What You Can Do With a Garage Conversion or ADU

A converted garage or newly built ADU can serve almost any purpose. Here are the most popular uses our Prescott clients choose.

Rental Unit / Income Property

Generate $1,200–$1,800 per month in Prescott's competitive rental market. A self-contained ADU with its own entrance, kitchen, and bathroom commands strong rents and can significantly offset your mortgage or fund other home improvements.

Guest Suite

Give visiting family members a private, comfortable space that's close but independent. A finished guest suite with a full bath and small sitting area provides far more comfort than a spare bedroom — and far more privacy for everyone.

Multi-Generational Living

Aging parents or adult children can maintain independence with their own private entrance, kitchenette, and living area — all steps from the main house. Multi-generational living arrangements are one of the fastest-growing trends in Prescott-area remodeling.

Home Office / Studio

Work from home in a separate, professional environment that's free from household distractions. A converted garage makes an ideal home office, creative studio, or remote work hub — with proper insulation, lighting, and climate control built in.

Short-Term Rental (Airbnb / VRBO)

Prescott's strong tourism economy and limited hotel inventory make it one of Arizona's most active short-term rental markets. A tastefully finished ADU or converted garage can perform exceptionally as a vacation rental, especially near downtown or Watson Lake.

Hobby Room / Workshop

Whether you need space for woodworking, art, music, or fitness, a fully conditioned and finished garage conversion gives you a dedicated area that doesn't eat into your living space. Proper insulation and HVAC make it comfortable year-round in Prescott's climate.

What a Garage Conversion Includes

A garage conversion is more involved than a simple interior renovation. It requires bringing an unfinished, unconditioned space up to residential building code. Here's what that means in practice.

Structural Work

The garage door opening must be infilled with framed wall, sheathing, insulation, and exterior cladding that matches or complements the existing home. This is one of the most visible elements of a conversion and when done well, can make the transition nearly invisible from the street.

The existing concrete slab typically needs waterproofing and a vapor barrier before any flooring can be installed. Depending on the slab condition, we may also need to address cracking, slope, or drainage issues. Walls are framed for insulation — we install to a minimum of R-19 in exterior walls, with R-30 or better in the ceiling — meeting or exceeding current Arizona energy code requirements.

Window placement matters both for natural light and egress compliance. If the converted space will be used as a bedroom or sleeping area, at least one window must meet egress size requirements under the International Residential Code as adopted by Arizona.

Mechanical & Finishes

Heating and cooling a converted garage requires its own HVAC solution. We most commonly install a ductless mini-split system, which is highly efficient, provides both heating and cooling, and avoids the need to extend existing ductwork. Mini-splits are particularly well suited to Prescott's climate, where both summer cooling and winter heating are necessary.

If the conversion will include a bathroom, laundry, or kitchenette, plumbing rough-in must be planned early — ideally before the slab is covered. Running supply and drain lines in a concrete slab may require cutting and patching. The electrical panel may need upgrading to accommodate the new circuits for HVAC, lighting, outlets, and appliances.

Finish work includes drywall, tape, texture, and paint; your choice of flooring (LVP, tile, or hardwood); interior doors and trim; cabinetry and countertops if a kitchenette or wet bar is included; and fixture and hardware selection throughout. Our team coordinates all trades and finish selections under one contract, so nothing falls through the cracks.

ADU Regulations in Prescott & Yavapai County

Zoning and permitting rules for ADUs vary by jurisdiction and change over time. Here's a general overview — we always verify current requirements with the City of Prescott or Yavapai County before beginning any project.

Zoning & Size Requirements

The City of Prescott permits ADUs on single-family residential lots in most standard zoning districts. ADU size is typically limited as a percentage of the primary dwelling's floor area, or capped at a maximum square footage defined by code — commonly in the range of 600–1,200 square feet depending on lot size and zone. Setback requirements for detached ADUs must also be observed.

Some Prescott zoning districts have historically required owner-occupancy, meaning either the primary residence or the ADU must be occupied by the property owner. This has evolved over time in response to state-level ADU legislation in Arizona, which has progressively reduced local governments' ability to restrict ADU development. We review current requirements at the start of every project.

Properties outside city limits in unincorporated Yavapai County fall under the County's land use and zoning ordinances, which differ from the City's. If your property is in Prescott Valley, Chino Valley, or an unincorporated area, different rules apply, and we research those requirements specifically for your parcel.

Permits & Timeline

A garage conversion or ADU requires a building permit from the relevant jurisdiction — City of Prescott, Prescott Valley, or Yavapai County. Depending on the scope, separate sub-permits for electrical, plumbing, and mechanical work may be required in addition to the primary building permit.

For a garage conversion, the permit application typically requires a site plan, floor plan, and construction drawings that demonstrate code compliance. Infinity prepares or coordinates all required drawings as part of our design-build service. After permit submission, plan review times vary — currently averaging two to four weeks for residential projects at the City of Prescott — though this can change based on department workload.

From permit issuance to final inspection and Certificate of Occupancy, a typical garage conversion takes three to five months, depending on scope, contractor scheduling, and inspection turnaround times. More complex ADU new construction projects may take longer. We give you a realistic project timeline during the design phase so you can plan accordingly.

Note: Zoning ordinances, ADU regulations, and permit requirements change regularly. Always verify current requirements with the City of Prescott Development Services Department or Yavapai County Community Development before proceeding.

Our Garage Conversion & ADU Process

We've developed a clear, step-by-step process that keeps your project on schedule, on budget, and fully permitted. Here's what to expect from start to finish.

01

Site Feasibility & Zoning Review

We start by reviewing your property's zoning classification, lot size, existing structures, and setbacks to confirm that a garage conversion or ADU is permitted under current rules. We'll identify any restrictions, easements, or HOA requirements that may affect the project, and give you a clear picture of what's possible before any design work begins.

02

Design & Permit Plans

Our design team develops a floor plan, construction drawings, and all required documentation for permit submission. We walk you through the layout, discuss finish options, and lock in the project scope before anything is submitted. Once approved, you have drawings you own — not renderings, but actual permit-ready construction documents.

03

Structural & Mechanical Rough-In

With permits in hand, we begin the structural work: garage door infill, framing, slab prep and vapor barrier. Immediately following, our licensed plumbing and electrical subs complete all rough-in work — supply lines, drain lines, panel upgrades, circuits, and HVAC system installation — before any walls are closed. All rough-in work is inspected before proceeding.

04

Insulation, Drywall & Finishes

After rough-in inspections pass, we install insulation (R-19 walls, R-30 ceiling minimum), then hang, tape, texture, and paint drywall. Flooring, cabinetry, countertops, trim, doors, fixtures, and hardware are installed in the correct sequence to minimize callbacks and damage. This phase is where the space truly transforms from a construction site into a finished room.

05

Final Inspection & Certificate of Occupancy

Once all work is complete, we schedule the final inspection with the building department. Upon passing, the jurisdiction issues a Certificate of Occupancy, which formally confirms the space is legally habitable and compliant with all applicable codes. We walk you through the finished space, review all systems, and hand over your warranty documentation.

Related Services

Garage conversions and ADUs often pair naturally with other whole-home projects. Explore our full range of remodeling services below.

Home Additions

Add square footage by building out rather than converting existing space. Room additions, second-story additions, and bump-outs give you new space where you need it most.

Learn More →

Design-Build Services

Our integrated design-build model means one team handles design, permitting, and construction. No gaps in communication, no finger-pointing between contractors.

Learn More →

Whole House Remodeling

If your project extends beyond the garage, our whole-house remodeling team can coordinate every room — kitchen, bathrooms, living spaces, and more — under one contract.

Learn More →

Garage Conversions Are Part of Our Full Remodeling Services

From a single garage conversion to a complete home transformation, Infinity Kitchen and Bath delivers craftsmanship, permitting expertise, and design talent across every project type.

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Garage Conversion & ADU FAQ

Do I need a permit to convert my garage in Prescott?
Yes. Converting a garage to living space is a structural change that requires a building permit from the City of Prescott (or your local jurisdiction if you're in Prescott Valley, Chino Valley, or unincorporated Yavapai County). The permit process ensures the work meets residential building codes for insulation, egress, electrical, plumbing, and HVAC. Infinity handles permit applications and plan preparation as part of every project.
Can I rent out a converted garage as an ADU?
In most cases, yes — provided the conversion meets the requirements for a habitable dwelling unit (proper egress, smoke and CO detectors, minimum ceiling height, heating and cooling, etc.) and is permitted and inspected. Some zoning districts have historically required owner-occupancy, but Arizona state law has progressively expanded ADU rights statewide. We review current rental and zoning regulations for your specific parcel before beginning design.
How much does a garage conversion cost in Prescott?
Cost varies significantly based on the size of the garage, the scope of work, and the finish level. A basic single-car garage conversion to a studio or home office might start around $40,000–$60,000. A two-car garage conversion with full bathroom, kitchenette, and premium finishes can range from $80,000 to $120,000 or more. New ADU construction (detached) is generally higher. We provide detailed, itemized estimates after an on-site consultation so you know exactly what you're getting.
Do I need to add a bathroom to a converted garage?
It depends on the intended use. A home office, gym, or hobby room does not require a bathroom. However, if the space will be used as a rental unit, guest suite, or ADU, a full or three-quarter bathroom is effectively required for the space to be practical and legally rentable. Adding plumbing during the initial conversion is far less expensive than retrofitting it later — we always discuss plumbing options during the design phase.
How long does a garage conversion take?
For a typical single- or two-car garage conversion, the construction phase runs approximately six to ten weeks once permits are issued. Factor in two to four weeks for permit plan review (sometimes longer depending on department volume), and you're looking at a total project timeline of three to five months from signed contract to Certificate of Occupancy. More complex projects with custom finishes or plumbing challenges may take longer. We give you a detailed schedule during the design phase.

Let’s Put Your Garage to Work

Whether you're ready to build a rental ADU, create a private suite for family, or convert dead garage space into a room you'll actually use — Infinity Kitchen and Bath is Prescott's trusted design-build partner. Contact us for a free on-site consultation and estimate.

Get a Free Estimate Call 928-800-1998