Hampshire · South East
Home Extension Costs in Southampton
Southampton's South East location means home extension costs are above the national average, though more affordable than London. The city's varied housing stock and growing population drive steady demand for property extensions.
Extension Types Available in Southampton
Single Storey Extension
A single storey rear or side extension is one of the most popular home improvements in the UK, adding valuable living space without the complexity of multi-level construction.
Estimated cost in Southampton
£32,200 – £50,600
Typical 20m² project
Double Storey Extension
A double storey extension adds significant space on two levels, making it cost-effective per square metre compared to two separate single storey extensions.
Estimated cost in Southampton
£55,200 – £87,400
Typical 40m² project
Loft Conversion
A loft conversion transforms unused attic space into a habitable room, offering one of the best returns on investment of any home improvement project.
Estimated cost in Southampton
£31,625 – £50,313
Typical 25m² project
Kitchen Extension
A kitchen extension creates a modern, open-plan living and dining space, typically extending the rear of the property to accommodate a larger kitchen area.
Estimated cost in Southampton
£32,085 – £51,750
Typical 18m² project
Garage Conversion
A garage conversion transforms an existing garage into a habitable room, offering one of the most affordable ways to add living space without building an extension.
Estimated cost in Southampton
£11,213 – £21,563
Typical 15m² project