Single vs Double-Storey Extensions: Which Is Right for Your Home?
If you've decided that your home needs more space, an extension can provide an alternative to moving while giving you the opportunity to create exactly what you need.
One of the first decisions is whether to build a single-storey or double-storey extension.
Both can completely transform a property, but the right choice depends on your budget, existing layout, available space and what you're hoping to achieve.
At Causeway Construction, we work on home extensions throughout Dorset, Bournemouth and Christchurch. Here's what homeowners should consider when comparing the two options.
What Is a Single-Storey Extension?
A single-storey extension adds new accommodation to one level of the property, usually the ground floor.
Rear extensions are particularly popular because they can transform smaller kitchens and dining rooms into large open-plan spaces overlooking the garden.
Side extensions can also make excellent use of otherwise underutilised land alongside a property.
What Can You Create?
A single-storey extension could provide space for a:
Larger kitchen
Dining area
Family room
Utility room
Home office
Playroom
Ground-floor bedroom
Often, several functions can be incorporated into one larger extension.
For example, a new kitchen-diner might also incorporate a utility room and comfortable family seating area.
Advantages of Single-Storey Extensions
The biggest advantage is the ability to completely rethink the ground floor.
Opening an existing kitchen into a new extension can create a dramatic sense of space.
Large sliding or bifold doors can also connect the new area directly with the garden.
Rooflights and roof lanterns can bring additional daylight into the centre of the property, helping prevent existing rooms from becoming dark after an extension is added.
What Is a Double-Storey Extension?
A double-storey extension creates accommodation across two levels.
The ground floor might provide the same larger kitchen or family area as a single-storey extension, while the first floor creates additional bedrooms or bathrooms.
For families who require significantly more space, this can be an excellent solution.
Making Better Use of the Footprint
One advantage of extending over two floors is that you're creating significantly more internal space from a similar ground footprint.
The additional upstairs accommodation could become a bedroom, en-suite, dressing room, bathroom or office.
This can be particularly attractive to homeowners who want to remain in their existing property for many years.
Which Is Better for Your Property?
There's no universal answer.
If the main problem with your property is a small kitchen, a single-storey extension may provide everything you need.
However, if you're short of both living space and bedrooms, extending across two floors could make more sense.
The existing architecture also matters.
A good extension should complement the original property rather than appearing like an afterthought.
Consider the Garden
It's important to think about how much outside space you're willing to sacrifice.
A large rear extension can create an incredible interior, but the relationship between house and garden should remain balanced.
Clever design can maximise internal space without extending unnecessarily far into the garden.
Natural Light Is Essential
When extending a property, consideration needs to be given to the rooms that were previously at the rear of the house.
The extension shouldn't leave these spaces dark.
Rooflights, lanterns and large areas of glazing can help bring daylight deeper into the property.
This is one reason design and construction should be considered together from the beginning.
Planning Permission and Building Regulations
Depending on the size, location and design of your extension, planning permission may be required.
Some projects may fall within Permitted Development rights, subject to the relevant requirements.
Building Regulations are a separate consideration and cover areas including structural safety, insulation and fire safety.
It's important to establish the requirements for your individual project before construction begins.
Think Beyond the Shell
When budgeting for an extension, remember that the project doesn't end when the walls and roof are complete.
You'll also need to consider elements such as:
Flooring
Decorating
Lighting
Kitchens
Bathrooms
Heating
Joinery
External works
Planning these elements early provides a clearer picture of the overall project.
Quality Construction Is Essential
An extension becomes a permanent part of your home, so workmanship matters.
From the foundations and structural steelwork through to plastering and second-fix carpentry, every stage contributes to the quality of the finished result.
A well-built extension should integrate naturally with the original property.
Building Extensions Across Dorset
Causeway Construction delivers home extensions and renovation projects across Dorset, Bournemouth and Christchurch.
Whether you're considering a contemporary single-storey kitchen extension or need the additional accommodation offered by a two-storey design, our team can help turn your plans into reality.
The best extension isn't necessarily the biggest. It's the one that solves the problems with your existing home and creates a space you'll genuinely enjoy using.
If you're considering extending your property, contact Causeway Construction to discuss your project.