Converting Two Single Garage Doors to Double

Joan Aug 08, 2026

Ah, the age-old dilemma of car affectionados worldwide - needing to squeeze two vehicles into a single-garage space. Many homeowners face this predicament, especially in older properties where a double garage just wasn't a priority. But what if you could change that? Today, we're going to delve into the realms of garage transformation, exploring how to convert two single garage doors into a spacious, convenient double garage. Let's roll up our sleeves and dive right in!

DIY Garage Door Replacement
DIY Garage Door Replacement

First things first, consider the benefits of a double garage. Apart from the obvious parking advantage, a larger garage space provides room for storage, workshop, gym, or even an extra living area. Plus, a double garage typically increases property value. Now that we've whet your appetite, let's dive into the conversion process.

Double garage door conversion with SWS SeceuroGlide LT insulated roller garage door in black
Double garage door conversion with SWS SeceuroGlide LT insulated roller garage door in black

Assessing Your Garage and Home

Before you grab your toolkit, take a step back and examine your garage and home. The conversion process will be easier and more affordable if you're expanding outwards. But if demolishing walls and rebuilding isn't an option, don't worry - we'll cover that too.

Double-Door Garage Conversion - Extreme How To
Double-Door Garage Conversion - Extreme How To

Check the width of your garage doors, and determine if there's enough room to safely add another car inside. Ensure your garage is tall enough - you don't want to be scraping your car's roof each time you park. Additionally, verify that your home's structure can support the construction work.

External Expansion

18+ Stylish Garage Door Conversion Ideas
18+ Stylish Garage Door Conversion Ideas

Expanding your garage externally is usually the simplest and most cost-effective route. Measure and mark the expansion area on the existing garage walls. Once you've confirmed the dimensions are feasible, demolish the wall, making sure to leave the top part intact for structural support.

Rebuild the wall to the desired size, ensuring it's square, level, and properly aligned. Reinforce the new section with additional studs or metal braces for strength. After the wall is complete, you can install the new garage door and it's ready to welcome your second car.

Internal Modification

Double Garage Door Conversion | Access Garage Doors
Double Garage Door Conversion | Access Garage Doors

If external expansion isn't an option, you'll have to move things around internally. Start by removing shelving or storage units on the sides that'll accommodate the second car. If necessary, relocate them to another area of the garage, or better yet, declutter and donate unwanted items.

Now, remove the existing garage door and frame. Reframe the opening to fit a standard double garage door (typically 16 feet wide). Install the new door and ensure it opens and closes smoothly. With this approach, you'll lose some storage space, but gain a second car slot.

Garage Door Installation

How To Replace Your Garage Door With French Doors
How To Replace Your Garage Door With French Doors

Installing the garage door is the final, critical step. Measure the width and height of the opening to ensure the new door fits perfectly. jedno**Bear in mind that different garage doors have varying installation requirements, so follow the manufacturer's instructions carefully.

Attaching the garage door to the opener may require professional assistance, especially if you're not comfortable working with electrical components. Make sure to use quality hardware and ensure the safety features work correctly.

a garage with a door and window that is boarded up
a garage with a door and window that is boarded up
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Choosing the Right Garage Door

Before making a purchase, consider insulation, durability, maintenance, and aesthetics. Insulated doors provide superior energy efficiency, vital if your garage is attached to the house. Steel and wooden doors are durable, while composite materials are low-maintenance.

Choose a design that complements your home's exterior. Swing-out, roll-up, or side-hinged doors are available, each with its advantages. Remember, more expensive doors usually come with better performance and longevity.

Safety First

Always prioritize safety. Ensure the doors' sensors are functioning correctly to prevent entrapment. Teach children about garage door safety. Regularly inspect and maintain the doors to keep them in top condition.

Converting two single garage doors into a double fulfills more than just a practical need - it enhances your home and increases its value. So why not give it a shot? With careful planning and execution, you'll soon be enjoying the convenience of a double garage. Happy converting!