Careful attention to detail, sourcing local materials, carrying out any work you can on a DIY basis and keeping one eye on the costs can all help to bring your extension project in on a tight budget.

If you are in need of some extension inspiration, take a look at this selection of projects that have all been achieved within a £50,000 budget.

(MORE: Building an extension? Follow this beginner’s guide)

A Sympathetic Extension

This extension is from Welsh Oak Frame

Image: c/o Welsh Oak Frame

Looking to add a new kitchen diner to their farmhouse in north Wales, the homeowners of this project chose Welsh Oak Frame to design and build their new addition as they felt that exposed oak would be in keeping with the style of the original farmhouse and would add character and warmth to the new space.

  • Location: North Wales
  • Cost: £40,000

An ICF Addition

This extension has been constructed using insulating concrete formwork (ICF)

Image: c/o Beco Wallform

This cottage on the Scottish Borders has been subject to a large extension constructed using insulating concrete formwork (ICF) from Beco Wallform.

  • Location: Scottish Borders
  • Cost: Approximately £12,000 (for the Wallform structure)

An Oak Frame Extension

The inside of this oak frame extension boasts vaulted ceilings

Image: c/o Border Oak

Completed by Border Oak, this oak and glass single room extension has been added to a listed Arts and Crafts house, and joined with a modern frameless glass connection so that the two parts can be easily distinguished.

  • Cost: £45,000 (for the supply and erection of the oak frame)

A Modern Orangery

This glass extension adds more space to a period home

Image: c/o Anglian Home Improvements

The owners of this period home wanted to introduce more space, and commissioned Anglian Home Improvements to add an orangery extension.

  • Cost: £18,000 (for design, materials and installation)

A Kitchen Diner Extension

The new extension by Design Squared made way for a new kitchen diner lit from above by a roof lantern as well as bi-fold doors

Image: Chris Snook

With a view to creating a more traditional space in keeping with the existing building, the clients behind this project were keen to knock down the old side extension to make way for a new addition.

The extension, designed by Design Squared, is clad in white render, and houses an open plan kitchen/dining/living area that is connected to the rear reception room.


A 1930s Semi Extension

Contemporary rear extension with render and flat roof

The challenge for Samantha Worrall and Philip Osborne was how they could create more space for their growing family within their 1930s semi-detached home on a limited budget.

The answer to the problem came in the form of a crisp and contemporary rendered extension to the rear of the property, along with a small side extension that runs down one side of the house.

  • Cost: £40,000

A Glazed Lean-To

This budget extension adds space to this Cotswolds home

The owners of this stone-clad home in Frome, Somerset were looking to create additional space off their existing kitchen. The couple opted for a lean-to conservatory filled with natural light.

Enlisting the services of David Salisbury, the design team at the company created a simple but effective design to perfectly fit the bill, complete with two skylights and top-hung windows for ventilation.

  • Cost: £40,000

A Seamless Addition

This addition to a 1970s semi-detached home has created a kitchen living dining space

After previously carrying out a garage conversion to this 1970s semi-detached home, Eclipse Property Solutions was enlisted once again by the homeowners to build a new kitchen/dining/family space to the rear.

  • Cost: £49,000

An Oak Frame Kitchen Extension

This oak frame extension from Croft Architecture was built on a budget of under £50,000

With a growing family, the owners of this three bedroom detached house in Staffordshire were becoming increasingly constrained by the property’s size.

Reluctant to move out of the area, the homeowners appointed Croft Architecture to come up with a design concept that would see their old, cold, leaking conservatory replaced with a modern, light-filled, open plan extension.

  • Cost: £50,000

A Semi-Detached Home Extended

A new kitchen dining and living space features in this extension to a semi-detached home

When the homeowners bought this semi-detached home in London, they knew immediately they wanted to create a new extension to the rear of the property.

A new 8m x 5m flat roof extension was built and clad in London Stock bricks to match the existing brickwork, with reclaimed bricks, also London Stock, used internally as a feature wall. A bank of rooflights brings natural daylight into the new space.

  • Cost: £45,000

Looking to work out the build costs of your extension? Find out how much yours could cost with our extension cost calculator.

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