Essex · East of England
Home Extension Costs in Chelmsford
Chelmsford's commuter town status and Essex location push home extension costs above the national average. The city's 1930s semis and post-war housing are frequently extended to accommodate growing families avoiding London prices.
Extension Types Available in Chelmsford
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 Chelmsford
£33,040 – £51,920
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 Chelmsford
£56,640 – £89,680
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 Chelmsford
£32,450 – £51,625
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 Chelmsford
£32,922 – £53,100
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 Chelmsford
£11,505 – £22,125
Typical 15m² project