Calcscape

Garage Conversion Cost Calculator

Turn a garage into conditioned flexible space with clear lines for the shell finish, bath, kitchenette, and code-driven systems.

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Your project scope

Converted garage area (sq ft)
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Converted garage area (sq ft)

Enter the planned sq ft amount.

Finish level
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Finish level

Finish includes framing, drywall, flooring, and typical windows/doors.

Bathroom
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Bathroom

Plumbing routes and fixture count drive this large scope.

Kitchenette
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Kitchenette

Appliances and cabinetry are modeled as a project allowance.

Insulation & electrical
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Insulation & electrical

Converted garages commonly need insulation, new circuits, and HVAC coordination.

Your state
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Your state

Scales U.S.-average labor and material midpoints for typical state-level pricing. It is not an on-site bid.

How to use this calculator

  1. Enter the converted garage area (sq ft).
  2. Choose each scope driver to reflect your project.
  3. Select your state for cost scaling.
  4. Review the itemized components before requesting bids.

Results explained

This model uses separate construction components rather than a single blanket rate. The band reflects common variation in access, design, and contractor pricing.

Quick reference: Garage Conversion Cost cost drivers

Installed U.S.-average midpoints before the selected state adjustment.

ScopeMidpoint
Basic ADU-lite finish$115/sq ft
Mid living finish$165/sq ft
Full bathroom$18,500
Full kitchenette$24,000

These are planning midpoints, not a site inspection, engineering opinion, or contractor proposal.

How the estimate is built

Base finish is applied to area, while bath, kitchen, and systems selections add itemized components; permits are state-scaled.

Example scenario

A 480 sq ft mid-finish conversion with a full bath and basic kitchenette models around $111,000 before state differences.

FAQ

Is this a legal ADU?

Not necessarily. Zoning, parking, egress, and utility requirements determine legal use.

Is HVAC included?

The systems package includes a planning allowance; duct extensions or a mini-split may vary.

Does it include a new slab?

No. Major slab leveling, moisture mitigation, or structural work needs inspection.