Essex · East of England
Home Extension Costs in Southend-on-Sea
Southend-on-Sea's Thames Estuary location and London commuter appeal push home extension costs above the national average. The town's Victorian and Edwardian seafront properties and suburban housing see strong demand for loft and rear extensions.
Extension Types Available in Southend-on-Sea
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 Southend-on-Sea
£30,800 – £48,400
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 Southend-on-Sea
£52,800 – £83,600
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 Southend-on-Sea
£30,250 – £48,125
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 Southend-on-Sea
£30,690 – £49,500
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 Southend-on-Sea
£10,725 – £20,625
Typical 15m² project