# Garage Construction Cost Calculator

Plan your new garage with our construction cost calculator. Estimate prices for 1-car, 2-car, and 3-car detached or attached garages instantly.

## What this calculates

Building a new garage is an excellent way to protect your vehicles, add storage, and expand your workspace. The overall cost depends on size, number of bays, whether it’s attached or detached, and the materials you choose for the foundation, framing, and exterior finishes. Our garage construction cost calculator makes it easy to estimate project costs and set a realistic budget.

## Inputs

- **Garage Type** — options: Attached (shares one wall with house), Detached (stand-alone)
- **Number of Car Bays** — options: 1 car (12 x 20, 240 sq ft), 2 car (24 x 24, 576 sq ft), 3 car (36 x 24, 864 sq ft), 4 car (48 x 24, 1152 sq ft), Custom size (enter sq ft below)
- **Custom Size (if selected above)** (sq ft) — min 100, max 5000
- **Finish Level** — options: Basic ($45/sq ft, vinyl siding, manual door), Standard ($65/sq ft, Hardie siding, insulated door), Upgraded ($95/sq ft, finished interior, 12ft walls), Custom ($150/sq ft, matches home exterior)
- **Include Electrical Upgrade** — Adds $2,500 for sub-panel, multiple circuits, EV charger prep
- **Include HVAC / Heat** — Adds $3,500-6,000 for mini-split or furnace extension
- **Include Loft / Bonus Storage** — Adds 15-25% for additional floor framing and stairs
- **Regional Cost Level** — options: Low (rural, South, Midwest), Average (most suburban), High (urban Northeast, CA)

## Outputs

- **Garage Size** (sq ft)
- **Cost Per Square Foot** (/ft²) — formatted as currency
- **Base Construction Cost** — formatted as currency
- **Electrical Upgrade** — formatted as currency
- **HVAC / Heat** — formatted as currency
- **Loft Addition** — formatted as currency
- **Total Garage Construction Cost** — formatted as currency

## Details

Breaking Down Garage Costs

Pouring a new concrete slab accounts for a large portion of the budget, but framing and finishing dictate the final price. We calculate your estimate based on:

- Size and Bays: Standard pricing for 1-car, 2-car, and 3-car layouts. A typical 2-car garage costs between $20,000 and $35,000.

- Foundation: Excavation and pouring a standard reinforced concrete slab.

- Attached vs. Detached: Attached garages are usually cheaper because they share an existing wall with your house and allow for easier tie-ins to your home's electrical panel.

Setting Contractor Expectations

Select your preferred construction style, and we will calculate the estimated costs for the framing, roofing, and standard electrical wiring, giving you a solid baseline for contractor discussions.

## Frequently Asked Questions

**Q: How much does it cost to build a standard 2-car garage?**

A: A typical 2-car garage costs between $20,000 and $35,000 to build, depending on local labor rates and the materials used for the exterior.

**Q: Is an attached garage cheaper to build than a detached garage?**

A: Usually, yes. Attached garages share an existing wall with your house and allow for easier tie-ins to your home's electrical panel.

**Q: Does the estimate include the concrete foundation?**

A: Yes. Our estimates factor in the cost of excavating the site and pouring a standard reinforced concrete slab.

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Source: https://vastcalc.com/calculators/construction/garage-construction-cost
Category: Construction
Last updated: 2026-04-21