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. Here, we look at some examples of those who’ve transformed their home for under £50,000.

A Kitchen Diner Extension

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.

This extension by Design Squared made way for a new kitchen diner, built on a budget of under 50K

Image: Chris Snook

One challenge was to design a new extension without disturbing the existing bespoke joinery; another was to comply with planning restrictions concerning the overall height for a new extension — a condition that Design Squared met by incorporating a shallow roof lantern into the new side extension that brings unrestricted light into the new kitchen. New full-height glazed doors to the rear also provide a greater connection with the garden.

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

The clients also wanted the existing dining room to connect seamlessly with the new kitchen, so steelwork was inserted to allow the wall to be removed, opening up the dining space to the kitchen. A glass balustrade links the different levels.

The clients are more than impressed with their new space that has improved their day-to-day family life.

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 house suffered from tired, cramped internal spaces, including a non-existent entrance hall and no downstairs WC.

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.

Open plan contemporary kitchen and living room

The flat roofed extension is now home to a bright open plan kitchen, dining and seating space, with the addition of two large rooflights in the kitchen and dining areas bringing plenty of natural light in. The side extension has also provided an entrance hall and WC.

The owners had the advantage of being able to design the house themselves (Samantha is an architect), as well as design their own kitchen (Philip works for his family’s kitchen business), which helped with their low build cost of £40,000.

A Glazed Lean-To

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.

This budget extension adds space to this Cotswolds home

Complementing the style of the existing building, the final design of the conservatory was finished in Pebble White with brass window and door furniture.

The fully glazed lean-to extension by David Salisbury creates a light-filled dining area

Being keen DIY lovers, the homeowners took an interest in all aspects of the £40,000 project, especially the on-site construction. The couple have found their new room to be a delightful addition to the house and an extra space that can be used all year round, filled with plenty of natural light and warmth.

A Seamless Addition

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.

A large extension by Eclipse Property Solutions has transformed the living space of this family home

The existing layout had consisted of a small kitchen with a separate dining room leading off. The brief was to remove the wall dividing the kitchen and dining room and extend the property out by 4m. The new extension runs across the width of the house by 7m to provide ample living space for the family of four.

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

Masonry construction was specified, with the outer skin of brick selected to match the existing house. A pitched roof was introduced to the new extension with electric Velux rooflights installed to bring in natural light (they are remote controlled and close automatically when it rains), along with full-height bi-fold doors which fold back to open the whole rear elevation to the outdoors for a true indoor/outdoor feel.

Contemporary floor tiles in this space have also been laid to run to the outside patio, to create a seamless transition from the new extension into the garden. The build cost for the project was £49,000.

An Oak Frame Kitchen Extension

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.

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

The brief for the new open living space was to create a hub that the whole family could enjoy, with zones for cooking and dining. Delivering the extension on time and within a tight £50,000 budget was essential, as was minimising disruption to the daily lifestyle of the young family and their pets, who remained living in the property during the works.

Green splash backs contrast against the white gloss kitchen units in this oak frame extension

Unfazed by the price premium normally associated with oak, the clients contacted numerous companies for quotes and eventually perseverance paid off; the oak structure was sourced locally in Staffordshire, within budget.

The design of the extension was developed to make the most of natural light throughout the day through rooflights, with the evening sun being captured by the full-height, grey-framed bi-fold doors. A pitched roof, meanwhile, allows for a vaulted ceiling inside, bringing an airy feel to the new kitchen diner.

A Semi-Detached Home Extended

When the homeowners bought this semi-detached home in London, they knew immediately they wanted to carry out work to the rear of the property. The existing layout on the ground floor consisted of small, dark rooms, a dated kitchen and two separate old conservatories. With a view to creating an open plan family area divided into four zones – kitchen, dining, TV area and utility – Eclipse Property Solutions was brought in to create a new extension.

This semi-detached home in London has been extended to create an open plan kitchen diner

The two conservatories were removed and the old kitchen stripped out, before the rear of the house was opened up and new steelwork introduced. 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.

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

To offer a better connection with the garden, a set of bi-folds were installed and a level threshold between the extension and the outdoors was introduced. Thanks to the new addition, the ground floor layout has been transformed into a more sociable space where the family can entertain — all on a budget of £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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