House Extensions

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Over 25 Years Experience

With over 200 extensions completed in the last 30 years, we have built an excellent reputation for outstanding results in Essex.

Fully Qualified Professionals

Our team of expert tradesmen all have the highest levels of expertise and the advanced trade qualifications required to guarantee the industry-leading standard for your house extensions Essex.

Satisfaction Guaranteed

We work closely with you throughout the whole process to make your vision a reality, and to ensure that you are completely satisfied at every stage of the build

Refurbed open plan kitchen and living room 2
Refurbed open plan kitchen and living room 2
Brand new kitchen fitting in Essex
Brand new kitchen fitted in Essex 2

Our services

What our customers have to say

C Warner - Upminster, Essex - Home Extension

A huge thanks to Dave, Julian, George, Vern and everyone involved in building our extension. They have created us a large 50 square metre open plan kitchen, dining and lounge area and we look forward to enjoying it as a family for many years to come. The job was started exactly when agreed and the quality of workmanship has been first-rate throughout the build. Communication was excellent and we could always contact someone if we needed to. There were some unforeseen issues with the existing part of the property and the way it was dealt with by Dave and the team is a true testament to the sheer professionalism of this firm. I would not hesitate to recommend Bush Builders and we will definitely be using them for further works."

Neil F Brentwood, Essex - Home Extension

Dave and his guys built us a very large extension across the whole length of our home. One of the largest builds the team had done, and we couldn't be happier. Dave was realistic and is the only tradesman I have met who gets back to you each time call. The guys are an established team and clearly work well together, minimising delays as much as possible. We are absolutely thrilled with our extension, quality of the work and all interactions with Dave and the guys Could not recommend strongly enough."

Why Should you Choose Bush Builders?

At Bush Builders we believe that experience is the single most valuable asset in the construction industry. Bush Builders is a proud family-run business, and for over 25 years now, we have led the way in bespoke house extensions Essex. As a family business, we know how important your home is to your family, and we always start every project by discussing how we can make your home, work for you.

We view every house extension that we take on as a unique building project that is minutely tailored to your specifications. Every family’s needs are different, and so the first thing we do in our step by step process is listen to your vision and plan a house extension that will guarantee you can get the most out of your new space.

We have worked alongside hundreds of people whose family or need for space has outgrown their home. Our mission is to make our client’s vision a bricks and mortar reality and we have produced custom-built home extensions costs to fit every client brief. Our aim every time is to maximize the potential for extra space in your home and to work with you to design a house extension that utilizes every inch of that space, whether that be a new utility room in a side return extension or a little playroom for the kids at the back of your new kitchen. We use all our expertise to create a space that works for you. Contact us today to get a free quote and evaluation!

We have gained a reputation for working closely with our customers to build the perfect home extension to fit their needs. We have completed a hugely diverse range of refurbishment projects; from single storey kitchen extensions, through to large multi-storey projects. We draw on all our accumulated knowledge to deliver a home extension that will dramatically transform your home and provide you with the extra space that you need.

We are committed to offering the best advice possible based on our years of experience and knowledge, to make sure that together with our experts, you can plan the perfect house extension Essex for your property. We can take you through each stage of the process; from discussing concept architectural drawings, applying for planning permission and continuing right through to the finishing touches. 

A quality home extension does not just add space but will also add significant value to your home. Throughout every stage of the process, we will offer advice about how to maximize that added value. We have extensive knowledge of property prices in every area in Essex and we can advise you on what sells in your area. We believe that the perfect home extension unlocks the potential space in your home right now, and the potential value of your home you would like in the future.

We fully understand that cost is one of the most important considerations to make when planning your home extension and over our 25 years in the trade we have delivered house extensions in Essex of the highest quality for every level of budget. 

At Bush Builders, we are committed to keeping our prices competitive whilst maintaining the highest quality workmanship, and we firmly believe that the value for money we deliver is unmatched anywhere in Essex, or indeed throughout the rest of the country.

We can offer advice on how to source quality materials whilst keeping your costs down, and have access to a range of suppliers who may be able to secure you with significant trade discounts. We will work closely with you at every stage of the planning and building process to help plan every detail of your budget and make sure that we deliver your dream house extension at a price that you can afford.

If you’ve only just recently started thinking about a house extension, see our house extension cost guide to get an indication of the potential costs of your project. Every building project we take on is unique and so we are more than happy to provide a detailed estimate of the cost of your proposed building works, totally free of charge.

We genuinely believe that we are the number one building companies Essex and that no other company can compete with the standards that we have set.

But don’t just take our word for it! Check out our customer testimonials to see what our clients have to say about our work, or visit our gallery to see it for yourself!

Feel free to contact us using the contact form or give us a call for an informal chat about what we can provide for you. We can answer any queries you have or even arrange a time to come and visit your property so that we can carry out a detailed survey of your site and discuss with you, the best options for your extension.

Get in touch today for a free quotation on your extension works with Essex building companies number one!

Kitchen diner refurb Essex
Kitchen with tiled flooring

Are you looking for a free no obligation quote for house extensions?

Call us today to discuss with an expert in Essex house extensions your building project and requirements for your Essex home. We can book you a free convenient no obligation site survey and quote.

About us

We are one of the leading Essex house extension builders, with over 30 years in the construction industry. We build many home extensions every year throughout Essex and London to exceptionally high standards helping homeowners create extra living space and their dream home.

Not only do we specialize in house extensions in Essex and London but also bungalow extensions. Homeowners often find single-storey buildings too compact and want more space and many of our customers are bungalow conversion owners now.

If you are considering a new extension, whether it is a rear extension, single storey extension, or double storey extension, for that all important additional space, contact us today on  for a free no obligation quotation.

Our friendly team are always available to discuss with you your ideas and offer guidance on an extension.

We specialize in loft conversions, garden rooms, garage conversions, side return extension, wrap around extensions, double storey extensions or even just to renovate your existing property with a kitchen extension in Essex and London.

Leading extensions Essex builders create extra space

A house extension allows you to utilise unused space you already have in your home. A house extension will not only give you additional living space a property extension can also add significant value to your existing property.

Moving home is costly and can incur hidden costs, and many more homeowners are turning to a house extension to give them the additional living space they need without the stress and costs of moving house.

High estate agents fees, legal costs, stamp duty and removal company expenses can all be avoided with home extensions. Your existing home can be beautifully transformed with a simple extension, that will add more living space to your home.

You may need to have an extension built to accommodate a growing family, or feel the layout on the ground floor needs reconfiguring to create an extra dining room or perhaps you dream of a grand open plan kitchen diner with bi fold doors leading out seamlessly to the garden.

Whatever the reason, a home extension is a great way to create that much needed extra floor space. You may not even have to loose any of your garden depending on the type of home extension you opt for.

Our house extensions Essex

We are one of the top extension builders in Essex and work in accordance with the current building regulations and safety regulations.

All our contractors hold the necessary qualifications and certification so you will have complete peace of mind that the whole process of your property extensions are safe and professional.

We expertly project manage your building project. You will have your own project manager who will ensure that everything during the construction stage runs smoothly.

Your project manager will ensure building works are correct including insulation, electrics, windows, drainage, plumbing, plaster, install the heating system, skirting, internal doors, complete the decor, including floor coverings, carpentry and much more.

We can offer several different types of house extensions such as:

And finally,

We can help you to design and build the space you have always dreamed of whatever you want your extension for. From design and planning to the build and completion our dedicated team will let you know exactly what is going on every step of the way.

Call us today for your free no obligation quotation.

We look forward to hearing from you!

Extension types covered

A single storey extension is built onto a portion of the home with one or more of the sides of the extension attached to the existing property and only the ground floor and possible basement built into it.

A building control inspector is required for single storey extensions. Your building project may be a permitted development which means you may not need to apply for planning permission from your local council.

We can arrange for an architect to visit your home and provide drawings and structural calculations. The structural calculations and drawings may need to be submitted to planning and building control.

We can advise you on planning permission from your local authority when we survey your property.

Side return extensions make use of the unused space in the alleyway down the side of your home. It might not seem like a lot of extra space but it can really open up your home.

This type of home extension is ideal if you dream of an open-plan area that will become the heart of the home.

This home extension build combines a side return extension and a rear extension. It is ideal for homeowners that want to maximise the space on the ground floor and add extra rooms like a utility room or a downstairs toilet.

The idea of an open-plan kitchen extension with an island and a hidden utility room is a must for many people.

Double story house extensions look impressive. If you want to make the most of the property you have, a double story extension will provide all the square footage you need.

You can create a large beautiful space downstairs and upstairs there will be space for an extra bedroom, home office or bathroom.

Over structure extensions include building over the garage. Garage conversions are very popular they provide extra space for an extra bedroom, office, or gym in the home from what might have been just a dumping ground or unused space.

A loft conversion can add a much needed extra bedroom, office, or bathroom. Some of our clients choose to have a loft conversion at the same time as an extension to maximise space. We are able to carry out loft conversions alongside a home extension. For more information click here.


Not all our extensions have required planning permission. More often than not a house extension can be carried out under permitted development so long as it fits the criteria. You can contact us for more information or see the Essex County Council planning here. 

A single story rear extension is not permitted to extend beyond the rear wall of the original house by more than three metres on an attached house and four metres on a detached house.

The maximum height of single storey extensions is four metres.

An extension of more than one floor is not permitted to extend beyond the original rear wall of the property by more than three metres.

If you need full planning permission rather than permitted development for a house extension and more space in London, there will be an application fee you must pay and costs for the plans to be made. An architect or a building company like us can provide the plans.

Actual costs vary starting with alterations and extensions made to a single story dwelling house, and increasing from there, which all depends on the size of the property extension.

Once you have permission to build work can start on the house extension by our exceptional team of builders in Essex.

Getting permission for a house extension when you need it can be a stressful time. But getting permission from planners should be around eight weeks for a decision on whether it can go ahead.

With a large or complex application it can take as long as sixteen weeks, especially if an environmental impact assessment is carried out so, please be prepared for the wait.

We have many years of experience when it comes to house extensions and obtaining planning permission (when required) we can keep you informed during the process.

All our extensions are bespoke, as home extension experts we are proud to show you our previous extension builds that we have carried out.

We are happy to arrange for you to talk to our completely satisfied customers. Give us a call and we can arrange this for you.

You can also see example work photos here.

We are happy to provide you with a written and tailored quotation. We will advise on whether planning permission is required for your proposed extension. The quotation will clarify the various options available to you for a home extension, and the various very competitive costs to make your choices happen and become a reality.

Here are some ball park figures to give you an idea of costs involved in Essex house extensions:

  • Side return extension Essex £35K

  • Rear kitchen extension Essex £40K

  • Wrap around extension Essex £55K

  • Double Story extension cost Essex £75k +

On average around ten to twelve weeks to complete but there are various factors to consider. The main one being the size of the extension as well as the spec for the project, a larger build will take longer.

When you book a home extension we will be able to give you an estimated time of completion based on the amount of work you require for the extension.

Of course all work will be project managed every step of the way so, if the completion date needs to be extended you will be informed immediately.

If your home is not in a conservation area you might have permitted development rights. These rights allow you to build your extension without having to go through a planning process.

For more on requirements and criteria visit the UK planning portal. It is important to check before your extension goes ahead.

A party wall agreement will be required if the wall of your property is connected to another property on either side of yours. The neighbours concerned will need to be informed of the extension works using a party wall notice form, giving at least two calender months notice to neighbours before the building work starts on the property.

The party wall agreement is in place to protect you and your neighbours from any issues that could arise due to the work on the party wall. By law your neighbours can insist on a party wall agreement before the work starts.

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