House Extensions in Wandsworth


Thinking of a house extension? We know planning a house extension in Wandsworth feels like a challenging task, but you can rest easy. Red Box is a Which? Trusted Trader and a Trustmark registered local business. As a specialist local company, we have helped countless property owners make the most of the space in their homes.

As house extension specialists in Wandsworth, we are ideally placed to help local residents create valuable space in homes across the area – the light, airy and spacious results have improved the quality of life for our South West London clients and their families.

As professionals with many years of experience, make each house extension builder’s task run smoothly, efficiently to deliver on time and within budget. All that’s left for property owners to worry about is how they will use all the space they’ve gained once the work is complete. We know, from working on many home extensions in Wandsworth, how best to provide support. Our support starts from the very initial idea, so whatever you are planning, contact us for an initial consultation. We can ensure you have all the information you need to start on the right foot.

Other services in Wandsworth

Wandsworth Kitchen Renovation

Kitchen Renovation

Wandsworth Bathroom Renovation

Bathroom Renovations

Wandsworth Loft Conversion

Loft Conversions

Wandsworth Maintenance


Wandsworth Painters and Decorators

Painters and Decorators

Kitchen Extensions In Wandsworth

Our teams have worked on numerous large and small kitchen extensions in Wandsworth. We understand how important having more space to entertain, cook and eat can be. Whether you live in a period property or a newer building, we can help. Rest assured we’ll respond positively to even the most ambitious of kitchen extension plans. It helps that we have a full understanding of all the planning regulations and plumbing, lighting and power needs of modern kitchens.

All this means, if you have a specific kitchen extension design in mind, contact us. We can work with any chosen architect too. As expert kitchen extension builders, we won’t do anything before we’ve visited your kitchen and provided a fully detailed quotation.

Our people always work in a frank and transparent manner, priding themselves on delivering exactly what they promise on every project.

Red Box allocates a local project manager once we have been instructed to make a start. They will work tirelessly to put your kitchen extension plans into action.

Single Storey Extensions In Wandsworth

Single Storey Extensions In Wandsworth

Red Box has worked on a wide range of single storey extension projects in Wandsworth and the surrounding area. Our experience takes in everything from wrap around extensions and rear extensions to other bigger and more complex projects.

Whatever our brief, we take pride in creating more space for families like yours to make the most of. We can help with a range of roof extension options too. The world is your oyster when it comes to what works for your property. If you’re wondering ‘how much does a single storey extension cost?’, the answer might be less than you think. The best first step is to ask us to provide you with a no-obligation quotation.

Wandsworth property owners often use us to decorate their extensions once they’re structurally complete. It saves time and money. It helps that we are members of the Painters and Decorators Association, and also a Which? Trusted Trader and Trustmark registered, so you can be confident of the quality of any work. If you are looking for inspiration, our project gallery has several relevant examples of Red Box extension projects. They might prove useful.

Double Storey Extensions In Wandsworth

If you are a Wandsworth property owner with double storey extension plans, Red Box is worth talking to. Our people understand such large and potentially complex projects mean a lot to our clients. We know they involve a significant investment of time, money and family upheaval. Creating new space is often a challenge, but we can take the stress out of any project for you. Double storey extension costs might also be lower than you expect too. It is worth contacting us for an initial quotation.

We are always pleased to hear about property owner’s plans whether they are for rear extensions, front extensions, side extensions or wrap-around extensions. As well as answering the question ‘how much does a double storey extension cost?’, we can share double extension ‘before and after’ examples with you. Our aim is always to help you imagine the future of your home while being transparent about the costs, work and schedules involved.

Because of our skills and customer service track record, Red Box is the specialist building company Wandsworth residents like you keep coming back to. Our local teams of professionals and tradespeople can deliver extra space for you and your family.

How much is a double storey extension worth? We know the extra space can mean everything to our clients. That’s why we, once instructed, allocate a local project manager to each piece of work to reduce the strain and keep everything running smoothly.

Double Storey Extensions Wandsworth

Areas We Serve

We cover all postcodes in and around the Wandsworth area.

  • SW18

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 work 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.