House Extensions in Kensington


Planning a house extension? House extensions in Kensington can feel like a particular challenge. The good news is Red Box is a Which? Trusted Trader and Trustmark registered house extension property building business that specialises in helping homeowners in the area.

Whatever your ambitions, our house extension specialists in Kensington can work with you to create extra space and improve home life for you and your family.

Our highly skilled professionals and tradespeople make everything run smoothly. With Red Box, you can be confident everything will be managed by experts in home extensions Kensington residents, like you, have trusted with similar projects. All you need to do is imagine how you will use the new space.

Other services in Kensington

Kensington Bathroom Renovation

Bathroom Renovations

Loft Conversion Kensington

Loft Conversions

Kensington Painters and Decorators

Painters and Decorators

Wandsworth Home Maintenance


Kensington Kitchen Renovation

Kitchen Renovation

Kitchen Extensions In Kensington

Of all the home extensions projects we successfully deliver, kitchen extensions in Kensington are often the most ambitious. The good news is Red Box has experience of period features including plumbing, older buildings, rigorous planning approval requirements and tight space constraints.

Whatever the challenges we face, our experience as kitchen extension builders helps everything run smoothly. If you have a kitchen extension design in mind, contact us.

We start all our projects with a site visit and can then provide a transparent quotation and estimate based on your specific ideas. If you haven’t an architect or kitchen designer to help, don’t worry. We can help with early kitchen extension plans too.

Once any work is approved and agreed upon, you will be allocated a dedicated Red Box project manager who will ensure all our professionals and tradespeople work seamlessly to successfully deliver the extension you’ve dreamt of.

Single Storey Extensions In Kensington

Red Box can help you with any single storey extension plan. Whether you are looking for a single storey wrap around extension, a simple single storey rear extension or something more complex, we can help you every step of the way. We can advise on single storey extension roof options too from lean-to and cable designs to T & P shaped choices.

How much is a single storey extension? It may be less than you think so it’s always worth contacting us for a no-obligation quote. Kensington residents also often ask us for painting and decorating services once any extension is complete. Red Box is a member of the Painters and Decorators Association so you are guaranteed the best quality.

If you are looking for ideas, you can find a South London extension case study here. Our project gallery contains examples of Red Box extension projects that might inspire you.

Double Storey Extensions In Kensington

Kensington residents with double storey extension plans often come to Red Box early in the project to discuss possibilities and fully understand double storey extension costs. Starting a big double side extension or double rear extension project for your home can feel daunting, but it needn’t be stressful. We are here to help, so contact us.

We can share local Kensington double storey extension ‘before and after’ examples.

If you are wondering how much a double storey extension costs, we can give you a no-obligation quote after a site visit. It may be less than you think.

However you are looking to increase the space in your home, it is worth knowing Red Box is the specialist building firm many Kensington residents have turned to for their house extension projects.

We have, over the years, helped many of them turn dreams of extra space into reality.

Once we have any instruction from you or your architects, we will assign you a local experienced project manager who will keep your project on track.

Double Storey Extensions In Kensington

Case Studies

Areas We Serve

We cover all postcodes in and around the Kensington area.

  • W8
  • W14

Why Choose Red Box


We specialise in home improvements, extensions, kitchen fitting and bathrooms as well as the associated services of plumbing, electrical and full decoration work.

Our team works closely with architects and designers, either engaged by us or which you may have already engaged. We are happy to follow your design or work with you on a design to fit your budget and taste.

We’d love to hear from you!

For any questions please fill out the quick form on the right to drop us an email and we will be in touch.