House extensions in Hammersmith

The properties we see in Hammersmith

Brackenbury Village is 1870s–1880s two-storey artisan cottages, small, solid-walled and with minimal floor void, which makes every services run a chase and every extension a tight site. Around Ravenscourt Park the houses are substantially larger Victorian villas, many subdivided into flats. The mansion blocks along the riverside and around Barons Court are 1900s–1930s, with shared risers, communal roofs and — critically — leases that govern what a leaseholder may alter.

Planning in Hammersmith & Fulham

Hammersmith and Fulham is our home authority, so the process and the officers are familiar. Brackenbury Village and parts of Ravenscourt Park are conservation areas. The distinctive constraint here is leasehold: mansion block alterations need landlord's consent under the lease as well as any statutory permission, and a licence to alter is a separate legal process that runs alongside planning and building control. We flag that at the outset because it is the thing that most often delays a flat project.

What extensions involves

A single-storey rear extension in Fulham costs £3,000–£4,500 per square metre, so a typical 20m² side return is £60,000–£90,000 and takes 14–20 weeks on site. Most Fulham terraces can extend under permitted development, but conservation area status changes that — worth checking before you design anything.

Consider this if

• The kitchen is a narrow galley at the back of the house
• There is a dead side-return alley you never use
• You want the kitchen, dining and living space to be one room
• The family has outgrown the ground floor
• You are choosing between extending and moving
• You want more light into a dark Victorian middle room

What's included

• An honest permitted-development check before you spend money on design
• Architect and structural engineer coordinated, or we work with yours
• Party wall notices served and surveyor appointed
• Foundations, steels, brickwork, roof and glazing
• Full services into the new space — power, lighting, heating, drainage
• Building control inspections and completion certificate

The standard we build to

Built to current Building Regulations Parts A, L and Q, with structural calculations from a chartered engineer and a Party Wall Award where the works are notifiable.

For the full write-up on extensions — costs, timescales, certification and the questions people ask most — see our house extensions page. The prices and standards are the same wherever we work.