How Much Does a Rear Extension?

A rear extension is ideal for properties without a side return option or detached and, as the name implies, stretches your home at the back to give you more space for your kitchen. There are three rear extension options available to you; a wrap-around extension, a single-story extension, and a double-story extension. (See All Types)

With a rear single-story extension, you can create a room area or simply extend an already existing room, and it is ideal if you have plans to expand your kitchen or design an open-plan kitchen.  

Pros of a Rear Extension 

  • Increases the value of your property 
  • Updates your home 
  • It Can be built in no time.  
  • Flexible roofing options 
  • Gives you the much-needed space 
  • More natural light 

Cons of Rear Extension 

  • You need to have ample space to create anything noteworthy 
  • Pricey per square meter 

The exact cost of the Home Rear Extension service you acquire depends on various aspects.


How Much For Side And Rear Extension

How Much Does a Side Extension Cost?

A common extension choice for Londoners because of the win-win option that it offers. It extends your home to the side and lets you keep your garden, thereby increasing your property’s value. A side extension, as the name implies, extends your home to the side; that is the area where you keep your trash, offering you the space to build the open-plan kitchen, dining room you have always wanted, or simply extending your kitchen. Although the space it creates is limited, the effect is glaring

Benefits of a Side Extension

  • Unlike other extensions that eat up your garden space, thus reducing your property’s value, a side extension lets you keep your garden.
  • Minimal disruptions since it can be completed within 3 to 8 weeks
  • Budget-friendly
  • An excellent way to flood the home with natural light

What Makes a Side Extension Unsavouray

  • Limited space offering
  • Only suitable for a particular property style.
  • It doesn’t justify the price

The exact cost of the Side Extension depends on various aspects.

How Much For Side And Rear Extension?

A Side and Rear Extension take extensions to a whole new level because it combines the benefits of a side extension and a rear extension to give you a fully functional room at a pocket-friendly price. As is implied by the name, a rear extension is from the back of your property, stretching it to create a well-lit and airy space.

It is common knowledge that the side extension space is minimal since it extends between your room and the boundary fence. By adding a rear extension, you can create an extra functional room that helps you live your best life without the limitation placed on your property space.

Pros of Side and Rear Extension

  1. Doesn’t require planning permission
  2. It quickly adds an extra room
  3. Budget-friendly
  4. Offers versatility and flexibility

Cons of a Side and Rear Extension

  • The space it creates is limited to the size of your garden
  • Eats the garden space

The exact cost of the side and rear extension depends on various aspects.

What Is A Side Return Extension

A fantastic way to create the space you crave without the stress and inconvenience of moving out is by extending your home. One of such home extension options is the side return extension. A side return extension is turning the useless space by the side of your home where you most likely dump your trash or keep outdoor equipment into a functional living space and bring to life the open plan kitchen, living room or dining room you have always wished for in your head.

Side return extensions stretch your home into the alleyway by the side of your home and lets you keep your garden. Some refer to it as the small but mighty extension.

The pros of side return extension

1. It doesn’t take up valuable garden space like other extension types

2. With a side return extension, it takes less time to complete, usually between 3 – 8 weeks. Which means reduced disruption to family activity.

3. It is an innovative way to create much-needed space.

4. It is cost-effective because of the more minor nature of the construction.

5. Brings in more natural light.

The downsides to a side return extension

1. The space that a side return extension adds to your home is not really much.

2. It is a slightly complicated project which makes it costlier than the rear extension (the rear extension adds more valuable space, only that it eats into your garden.

Everything You Need to Know about Rear Extension

Rear extensions dramatically increase the space and value of your home. Here’s everything you need to know about modern rear extension, ideas, types, planning permissions, costs and other things to keep in mind before kick-starting your project.

Want to go for a makeover of your clumsy kitchen to make it look trendy and more spacious?

Rear extension is a perfect way to get that extra space you have been longing to expand your kitchen, living, dining or other socializing areas.

Going for this type of extension not only helps you fulfil your space constraints but also adds to the value significantly.

Keep reading to discover some amazing rear extension ideas, everything about their types, costs, planning permission and how it can be created on terraced, semi-detached or detached properties.

What is a rear extension?

A rear extension extends from the end of your home into the garden space. This helps you gain additional area to expand your kitchen, dining and living space.

Mostly the modern rear extension is created along the width of the property and extends 3-6m towards the rear. They either have a pitched roof or flat roof.

Advantages of rear extension

  • Rear extension increase the living space
  • Adds to property value
  • No stairs required
  • Lesser paperwork
  • Cheaper than moving to new house
  • Easy to obtain planning permission as the façade of the property remains unchanged.

When it comes to rear extension ideas, there are actually two possibilities.

  1. Rear extension can be used to expand the size of the existing space such as the kitchen or dining area.
  2. New space can be created such as new room, bathroom, study room etc.

What are some modern rear extension types?

Planning to give your housing property a new attire with a modern rear extension? Have a look at some inspiring rear extension ideas that you can explore.

1.     Rear extension on a terraced house

If you’re planning to give a new look to your terraced house so that both space and light can be maximized, rear house extension should be your choice.

This rear extension idea is both internally effective as well as externally tempting for your house. This type of rear extension comes with skylights and sliding doors.

Hence, all parts of your home can witness natural light.

The walls are also white painted under this type of rear extension, making room for natural light to bounce around the house.

The ceiling of this type of a house is in vaulted form and this structure also contributes to the light maximization.

2.     Rear extension on a detached house

Going for rear extensions to a detached home are the easiest one if the home doesn’t fall in a conservation area or is a listed building.

The best part of rear extensions in the detached home is that it will never run into any sort of problems with neighbours.

Also, it’s easy to get approval from planning permission or permitted development rights.

3.     Rear extension to a Listed Building

You need to get official approval from the Planning Permission as adding a rear extension to a listed building doesn’t come under the permitted development rights.

It’s difficult to get permission as these buildings are very beautiful and need to be preserved.

You need to convince the authorities that the new construction will help protects and preserve the original structure, you may get the approval.

Or, else proving that the original structure had a rear extension might help in speeding the approval for rear extension.

For, all other reasons there might be a chance that the application is turned down and either require you to change your design.

4.     Rear extension to a Conservation Area

Similar to adding rear extension to listed building, you need to take planning permission to go for any rear and side extension to a conservation area.

You can contact local authorities regarding the local architecture features or the other do’s and don’ts to be followed for the new planned extension.

Read More:- What Building Regulation Do I Need for A Home Extension

5.     Flat roofed bungalow rear extension

If you’re planning on bungalow rear extension, this type of rear extension can be a proper fit. A bungalow with rear extension can give a contemporary turnout to your property.

It is indeed the best option that helps to add more amenities and facilities to the bungalow because they are built on large plots, and you’ve enough space for a rear extension.

6.     Crittall style rear extension or Glass Rear Extension

You must already know about the rising popularity of Crittall style doors in the UK.

Crittall style doors and windows can give your property an instant touch of style and also add the desired glamour and elegance to the space.

So, try to merge your glass rear extension ideas with Crittall style doors and windows and see the magic. These doors also look good from the inside and make your interiors look newer.

Reach out to the best house rear extension experts in UK for modern Crittall doors that are double glazed, fire-rated and are thermally super-efficient.

7.     Single storey rear extension

Single storey helps you get some excess space (and value) on the ground floor of your existing property.

The best thing about single storey rear extension is that the backside of your home gets opened and you can use this excess space for gardening purposes.

From extra bedroom to studies, this single storey rear extension can be converted into anything you want it to be and helps you make your home perfect!

8.     Double storey rear extension or 2 Storey rear extension

Double storey rear extension is pretty common in the UK and it also gives your property a contemporary touch.

Commonly known as 2 storey rear extension, it’s adding an extension and a floor above it to the rear of the property.

It may happen that you have an existing single storey rear extension and still need more space. Going for 2 Storey rear extensions would give you the space you dream and desire.

It is indeed a great option to add another bedroom upstairs that opens up a great space for a spacious kitchen, living room or anything else that you may want to.

Do you need planning permission for rear extension plans?

There’s no fixed answer to this question. Many councils based in the UK consider rear extension as a part of Permitted Development (PD).

If your planned layout of rear extension falls under those councils and it satisfies all the PD rules and regulations, then you don’t need any permission.

However, if your property plan does not fit with PD guidelines, you have to apply for an approval.

Even though you can apply it yourself, it may not always work. Largely because you need proper drawings of your rear extension plan and for that, it is better to seek expert assistance.

Here are some cases when you need to seek planning permission for a rear extension.

  • If your house falls under a listed building or in a conservation area, you may need to apply for approval from planning permission.
  • The size of planned rear extension is more than half the width of the property.
  • All the single storey rear extension cannot be more than 4m in height.
  • The new roof of the rear extension should not be higher than the existing roof.
  • The proposed extension should be taller than 3m and should fall within 2m of the property boundary.
  • You may need to seek permission in case the rear extension includes chimneys, balcony, verandas or microwave antenna.
  • Any alteration to the original roof.
  • Usage of any material to be used on the exteriors other than the existing one would require seeking permission.

Building Regulation for rear extension plans

Approval from Building Regulations for rear extensions is required irrespective of location and size.

The drawings for the rear extension layout that are to be submitted for approval to building regulation authorities should include details on:

  • Sound insulation
  • Fire safety
  • Detailed structure layout
  • Drainage electrical design/installation
  • Mechanical design/installation
  • Ventilation

How to Build a Rear Extension?

After getting the planning permissions as well as the approval from building regulations, the construction for rear extension can be stated as per the approved drawings.

Step1: Preparing the site

Before the work begins, it’s important that neighbours are well informed about the constriction so as to avoid any hassles, complaints or denial of access.

Also, proper arrangements should be made to ensure that site access is clear and there is proper space to store the building material.

Step2: Drainage and Groundworks

The ground is then excavated for foundations and pouring the concrete followed by piping, wiring, drainage and other services.

The building control inspector should be contacted to approve the foundations.

Step3: Building

The actual building process starts now that involved digging of trenches, working on extension of walls, concrete flooring and measuring dimensions for doors and windows.

Fitting and installation of downpipes and connecting them to the drainage system.

Step4: Remodelling

After the structure is complete, all the redundant fittings and internal fixtures are removed. The internal space is reconfigured as per the requirements.

Step5: Finishing touches  

Now, it’s time to go for electrical and plumbing works as per the requirement and nature of the rear kitchen extension.

Final decorations, appliance set up and other interior set up can be done.

How much does a rear extension cost?

There is no fixed cost of rear extension. You need to understand first about your necessities and then only the cost can be estimated.

The rear extension cost depends on a lot of factors including labour cost, materials and other application costs of planning permission.

High-quality materials are expensive but are worth if you want your rear extension to look aesthetically appealing and last long. Indeed they come with a good price tag.

But these do increase the value of your home and are worth the investment.

How long it would take to build a rear extension?

Generally, for a single storey rear extension or small rear extension it takes around three to six months for complete construction.

But, it depends purely on the complexity of the project and layouts.

If there are certain other things such as planning permission approval if the building falls in conservation area or is listed, some more time may be accounted.

TEL Constructions: One-stop Company for all your Rear Extension needs

Are you looking for a construction company that can provide you best ideas relevant to a rear extension?

Reach out to TEL Constructions.

With more than 10 years of experience in the construction industry and a dedicated focus on your needs, we have all the in-house talent, tools, machinery, and equipment required to convert your vision into reality.

Our competent team ensures best rear extension designs that are unique and designed completely as per your needs, budget and style.

Planning a rear extension? Get in touch with us at 02081584006 today!

What Building Regulation Do I Need for A Home Extension

Most of the home extension projects need approval under the building regulations UK. Here’s our quick guide on UK building regulations (section-wise breakup) that you need to know for your extensions.

Even if your home extension project doesn’t require planning permission, you may need to furnish approval from building regulations.

Building regulations are a set of regulations that ensure that the new structure whether its conversion, alteration or extension is sound, energy-efficient and completely safe.

After you have finalized your home extension layout plan by the architect or best contractor in UK, it’s time to get them submitted and approved by the local building control team.

The approval should ideally be taken before commencing the construction work.

Have a look at the complete guide to building regulations with detailing on every section such as flooring, foundation, walls, ventilation etc for home extensions.

But before moving ahead, let’s understand what is a home extension and its benefits.

What is Home Extension?

A home extension is an excellent way to create much-needed space in the home for your family to live, love, and grow. It is extending your home space outwardly to create functional space.

It is a fantastic way to have the space you crave without the stress and inconvenience of moving out. Apart from retaining your property, an extension can increase the value of your home by more than 10%.

The Benefits of Home Extensions

  • It is a cheaper way of creating functional space in your home
  • A properly planned conversion will give you a practical storage solution
  • It increases the value of your home
  • It saves you the cost of moving
  • Reduce your energy bills

What are building regulations?

Building regulations for home extensions in UK are a set of regulations or standards that are designed to ensure that the end result delivers a safe, healthy and energy-efficient home.

Even if you don’t require planning permission for carrying out certain extensions or conversions, complying with building regulations is a must.

Starting from foundations, floors, roofs to stairs, sire-escape etc every section has some specific set of standards that need to be met for every building.

Unlike the main aim of planning permission is to seek approval for constructing development of some kind, building regulations are meant to get these details (plan/layouts) verified and approved for compliance.

These details are checked by an approved inspector or a local building authority.

What if your home extension does not comply with building regulations?

Complying with building regulations is a legal requirement, failing to comply would mean that an enforcement notice would be served in case the new home extension does not comply with the building regulations UK.

The enforcement notice has the full authority to question the project and has the right to remove the work as well. An appeal can be made by the owner if he/she feels that the decision is incorrect.

Apart from that, if the new home extension does not meet the regulations it may render the insurances null and void. This may negatively impact your prospects of selling your property.

Building Regulations UK for Home Extensions Plan

Here are the key building regulations that you need to comply for your home extension project.

1.       Building Regulations for Foundation

Foundations are the prime elements of any building that safely transmit the load of the building to the ground. The foundations are critical for providing a sound structural stability to the building.

Depending on the requirements, the foundations can be:

  • Shallow-Fill: Here the minimum thickness of load transfer to soil is provided
  • Deep-Fill: Here the trench is filled completely.

Depending on the practicability and ground conditions, the fill varies from project to project.   

There are several other factors that need to be taken into account while designing the building foundation. These are :

  • Type of Soil
  • Load-bearing capacity of the land
  • Adjacent structures
  • Trees
  • Drains and sewers
  • Ground conditions
  • Landfill sites
  • Type of the new structure (extension)

3 separate visits are conducted by the Building Control Officers i.e. at the time of start, excavation and then, at the time of concreting.  Their word is final in all respects and may sometimes override your approved designs.

2.       Building Regulations for Ground Floors

The main function of every floor is to provide support to the room’s contents as well as the user’s weight.

Apart from this, it is important that the ground floor must offer thermal insulation and pose resistance to ground moisture.

The floors in the UK are majorly constructed as the solid floor, suspended timber floor and suspended concrete floor that uses pre-casted concrete planks.

The floors should be equipped with DPM (damp proof membrane) and should be thermally insulated.

The joists sizes, beam spans calculations must be done by a structural engineer and should be included in the plan submitted for approval

For contaminated grounds such as those contaminated with gases such as radon, these areas need to be well ventilated.

An additional gas membrane would be required to stop these harmful gases from entering the building and harming the structure.

Read More: What Are The Building Regulations for Loft Conversion?

3.        Building Regulations: For Ground Level walls

A substructure may be required to be constructed below the ground level depending upon the foundation. The main walls (above the ground) or superstructure would be built on this.

The main objective of building a substructure is to provide adequate support to the superstructure. This below-ground brick and mortar structure should be resistant to frost as well as underground sulphates.

4.       Building Regulations for walls

The main walls or the external walls of the home extension should be all-weather proof which means they should be able to resist whatever weather throw at them.

The walls should add to building’s structural integrity as well as minimize heat-loss. The strength of the cavity walls depends on the corrosion resistance ability of the wall ties that should be inserted at the right spacing.

This will help holding the two leaves together in a better way and aids in thermal bridging.

For internal walls, they can be stud partitions or load-bearing when structural integrity is the main consideration.

Whatever is the choice; the internal walls should comply with fire resistance and sound insulation regulations. Additional strict measures may be required in case of multi-storyed buildings.

5.       Building Regulations for structural openings

After the newly constructed home extension has been made water-proof, the normal structural opening is usually made through the exiting main/external walls.

This is done by removing existing window opening or French door ensuring that the load on existing lintel is not increased. Normally no extra support is needed.

But, in case a wide and new opening is required, additional support would be required. This is usually done by using steel beams.

The beams are installed as per the calculations done by the structural engineer and would likely be mentioned in the drawings.

These structural components such as timber or steel need to be fire proof so as to give then an additional resistance of at least 30 minutes to fire breakout.

6.       Building Regulations for Upper floors

Apart from accommodating furniture, internal walls and occupants, floors play a vital role in providing rigidity to the walls and making the structure lateral resistant.

Your structural engineer or home extension builder in UK will specify the type of floor, ceiling joists long with correct spacings and spans in the layout plan.

Along with these, soundproofing and fire resistance should be also be compliant with building regulations.

7.       Building Regulations for roofs

Along with dimensions, spacings and spans of the roof members, the UK building regulation also demands compliance to type/quality of timber used and specifications of steel beams used for roof structures.

According to the regulations, the roof coverings such as slates, tiles or flat roof membranes should be weather proof as well as should be appropriate for the roof pitch.

A breather membrane underlay is also desired to ensure correct levels of insulation and ventilation.

Proper flues must be designed to make sure that the combustion gases escape safely.

8.       Building Regulations for windows and doors

The building regulations UK for windows and doors cover compliance to everything starting from ventilation, thermal efficiency, fire-safety to guard rails, glazing safety, security and sound insulation.

Suitable guard rails are required in case of French windows or balconies.

9.       Building Regulations for ventilation

The home extension should be well ventilated for ensuring proper health.

While inserting a new wall, proper care should be taken that so that it should not impact the ventilation of the other rooms.

Adequate extract ventilation should be provided for bathrooms, kitchens, utility room or toilets to reduce the congestion and condensation levels as well as remove smells.

TEL Constructions- The most trusted and professional home extension builder in UK

Home extension is a perfect solution to address your space issues. It not only adds to the aesthetics but also increase the value of your property.

Having home extension plans but unsure about the UK building regulations compliance?

We, at TEL Constructions are the UK’s most trusted, professional and reputed home extension builder since 2011.

Our skilled and in-house extension experts ensure a seamless transition between your current one to the space of your dreams with 100% compliance with building regulations. A space you’ve always desired!

Call us at 020 8158 4006 or message us today for a free quote today!