How can I increase the size of my garage?

Author: Miss Mae Cummings V  |  Last update: Wednesday, December 24, 2025

Garage Bump-Out This option lets you upgrade your space from a one-car to a two-car garage, making room for another parking space and even a fitness area. This will require knocking down some walls to lengthen or widen the garage, so it's better to hire a professional if you're not experienced in construction.

How to make an existing garage bigger?

You'd have to, at a minimum, excavate an additional 3-4 feet, put in new footings (or potentially a thickened edge slab depending on what you have currently), doweled into your existing footing. You'd have to take down that end wall, rebuild it further out, build the extension side walls, extend the roof.

How much does it cost to increase the size of a garage?

If you're adding more space to your existing garage, you can expect a garage extension cost of around $10,000, with costs commonly ranging from $3,500 to $14,000 or more. Building a garage extension is an excellent way to give yourself more space for work, recreation, and storing your belongings.

Do I need planning permission to increase the size of my garage?

The good news is that building a garage extension may not require planning permission, depending on the design. Separate outbuildings like sheds, greenhouses and garages typically fall under permitted development rights, allowing you to build without full permission if within specified limits.

Can a garage be widened?

You can, but it requires a lot of construction and planning.

First, you'll need to hire an engineer to inspect your current garage—they'll let you know if the frame and foundation can support an extra extension.

Local builder fixes two car garage the wouldn't fit two cars

Does expanding a garage increase home value?

Believe it or not, the lowly garage is one of the most valuable assets of a home. You wouldn't necessarily think so, but a garage can increase your home's value by tens of thousands of dollars. According to HomeAdvisor, a garage can add between $12,750 and $33,200 in value to your home.

Can I make my garage opening bigger?

It requires careful measurements, removal of the existing door, alignment list, and installation of new framing. With the right tools and expertise, you can successfully enlarge your garage door opening to make it a larger door and more accommodating for larger vehicles.

Can I convert my garage without planning permission?

Planning permission is not usually required to convert your garage into additional living space for your home, providing the work is internal and does not involve enlarging the building.

What is the biggest you can build without planning permission?

Detached property extensions do not extend beyond the rear wall of the original home by more than 4m. The extensions roof & ridges must not exceed the height of the original house and the eaves must not exceed 2m in height of the boundary of 3m. Single-storey extensions must not exceed 4m in height.

How much does a 30x30 garage cost to build?

In total, most 30 x 30 garages cost between $25,000 and $35,000 based on customization choices or construction requirements. Every SteelMaster garage comes with custom pricing considering: Additional features: Customizations including service doors, windows, and added height.

How can I upgrade my garage?

9 Garage Upgrades That Could Increase Your Home's Value
  1. Install A Functional Garage Door. ...
  2. Insulate And Vent The Space. ...
  3. Use A Smart Storage Strategy. ...
  4. Install Adequate Lighting. ...
  5. Put An Easy-To-Clean Finish On The Floor. ...
  6. Add More Electrical Outlets. ...
  7. Add A Walk-Through Door. ...
  8. Let Your Car Own The Space.

What is the most cost effective garage size?

A 20×20 garage is one of the most sought-after sizes for both attached and detached garages. Offering ample space for two vehicles at a budget-friendly price, this size stands out as one of the most cost-efficient AND practical options for everyday homeowners.

How to increase the size of a garage?

You can extend the width of your existing garage from the side or extend its depth or length with a bump-out extension from the front or back. The not-so-simple part about it is that you may need to obtain your HOA's approval, a building permit, and have to follow your local zoning rules.

How expensive is it to expand a garage?

A garage extension costs $60 to $120 per square foot, or $9,600 to $24,000 on average to add another vehicle bay to the existing structure. The cost to extend a garage with a second-story addition is $60,000 to $200,000+, depending on the room size and features.

How much does a garage bump out cost?

Extending your garage space by adding a bump-out can be simple or quite elaborate. However, you'll most often avoid costly finishing and trim work, and mechanical and electrical work is minimal. Most garage bump-out additions cost between $90 and $120 per square foot to complete.

What is the largest shed without a permit?

Please note, Sheds and/or Structures under 120 square feet do require a Planning Permit.

What size can you build without planning?

The most common reasons for needing planning permission are when you want to: Build an extension which is more than 40 square metres (this includes new and any existing extensions)

What happens if you build bigger than planning permission?

If you don't secure planning permission before you start building, you risk enforcement action, which requires you to undo any works you've completed and return your property to what it was before. If you don't comply, you further risk court action and legal penalties.

Is it legal to convert a garage into a room?

Since California has passed the new ADU laws this year, usable rooms like garage conversions can be used as a source of passive income. Even if you're only planning on converting the garage to an additional bedroom or home office, permits will be needed for residential construction.

How much does a garage conversion cost?

On average, a garage conversion costs between £18,000 and £28,300. Keep in mind that cost of labour is higher in London and the Southeast, sometimes by up to 20% on average. A garage conversion could add a lot of value to your home.

Do I need an architect to draw plans for garage conversion?

If your garage conversion involves complex designs or significant structural changes, hiring an architect is highly recommended. Architects can provide innovative solutions and ensure the project meets all safety standards.

Can you increase the height of your garage?

Making a garage door taller or wider is a big project, and it's not for the average DIY homeowner. For most homeowners, it's just not worth the investment into engineering and contracting support. The best time to plan for the size of your garage opening is during the construction of your home.

Does a large garage increase home value?

A garage can add between 5% to 20% to a home's value, depending on factors such as location, design and the existing housing market. This increase can be especially significant in suburban areas where parking space is a premium.

How can I make my garage look bigger?

Here are some small garage ideas that will help make things easier for you.
  1. Get rid of the clutter. ...
  2. Maximize your wall storage space. ...
  3. Take advantage of your ceiling space. ...
  4. Increase parking space in a small garage with a car lift. ...
  5. Choose the right cabinets for your small garage. ...
  6. Update your paint, lighting, and flooring.

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