Can a Basement Be Bigger Than a House?

A basement can be bigger than a house. Planning permissions are needed to safely expand the basement beyond the footprint of the ground floor. Bigger basements considerably increase the value of a home.

Bigger basements are possible, but not practical. A basement with larger square footage than the house can be replaced with a garage or a barn cheaper. Basements can also be expanded without disturbing the house.

Is it possible to expand a basement without expanding the rest of the house?

It’s a common practice to expand basements without expanding the rest of the house. This is achieved by digging up the ground and by building new walls for the foundation. This practice is common in large cities where expanding the home at ground level isn’t possible.

People in London have been credited as the first to start building double basements. But what about simply expanding the existing basement and making it larger? This is possible and it’s one of the most exciting projects for your home.

Basements can be expanded to the footprint of a house easily

The first scenario implies your basement is smaller than your house. A basement covering a smaller surface than the footprint of the house can be expanded to the full size of the house by moving its foundation and enhancing its support positions. This process is the least expensive method of making a basement bigger.

Basements are expensive to expand beyond the footprint of a house

You can also make a basement bigger when it’s already as big as the house. This implies higher costs and it often makes little sense for homeowners who can add a storage building nearby such as in the backyard.

However, basements that are bigger than the house are increasing in popularity. The estimated cost for this makeover is sometimes small compared to the already high value of a home that would need such a project, which is an expensive home in a prime urban location.

A basement under a basement can be cheaper than expanding the basement beyond the walls of the house

A basement can also be expanded by building a second one. A basement under a basement or a double basement is a type of multi-level basement that increases a home’s size considerably. This is the most expensive method of making a basement bigger.

The highest costs associated with this process include adding a new foundation, new walls, and a solid floor that doubles as a ceiling for the lower level basement. Excavation costs are at least double the excavation costs at ground level. Engineering and architecture costs are expected to costs more than the excavation, however.

A basement under the garden is cheaper to build

Another good option for those who want underground storage is to build a separate basement in the garden. A basement under the garden is a modern project. Your garden lives on while you gain another storage or living space underground without having to spend as much as by making your existing home’s basement bigger.

Does a basement have to be the same size as the ground floor?

A basement doesn’t have to be the same size as the ground floor. A smaller basement is known as a partial basement. This is considerably cheaper than a full basement. A partial basement can later be expanded to a full basement, but at an extra cost compared to building one from scratch together with the house.

Can a basement be smaller than the house?

Yes, basements can be smaller than the house. Small basements are ideal for storage in warm climates. Full basements as large as the house are recommended in cold climates where the foundation tends to freeze if not underground.

Summary

A basement can be bigger than a house. It’s best to build a basement bigger than the house when you first construct the home. Otherwise, making your current basement bigger is going to cost a lot. It’s also easier to get permissions for a basement bigger than the house when you build them all at once.

Basements bigger than the house are generally recommended if you don’t have the space to add storage space such as a garage elsewhere around your house. It’s always cheaper and easier to build above ground than underground.