Building Regulations

Building Regulations control the standards for the design, construction and alterations to every building in the UK. Approved by Parliament, the association was developed by Government to ensure all buildings meet certain safety and security standards.

The Building Regulations also set the standards for energy efficiency, sustainability of buildings as well as the misuse and contamination of water supplies.

These regulations must be met on any new development or extension to your home. They cover all aspects of construction from foundations to insulation and ensure that quality facilities for those with disabilities are provided in every commercial building.

Before you go ahead with any home improvement, you must ensure all work is in accordance to their standards. The Building Regulations are regularly updated so make sure you keep yourself well informed. 


Windows & Doors

Building Regulations state that certain standards must be met when a window or door is replaced. An external window or door under the current set of Building Regulations is considered a “controlled fitting.”

It has been a legal requirement since April 2012 for all uPVC window installations in the UK to be fully compliant with current Building Regulations. If an installation does not comply then the homeowner as well as the installer could be liable for prosecution.


Trusted Double Glazing Installers

Double Glazing on the Web insists that all of our trusted local installers and suppliers are registered with an industry recognised body such as CERTASS or FENSA.

As a result, every installation receives a certificate from the relevant industry body whilst being registered with the local authority. Rest assured all work carried out by our members is fully compliant with current building regulations.

Your Trusted Local Supplier will register the work with a regulatory body on your behalf so you will not need to worry about any of the red tape or paperwork.

They should provide you with your certificate on completion of the work. This is an important document as it verifies that your installation adheres to building regulations and that the work meets necessary standards of practice.


Building Regulations and Energy Efficiency

The Government has also altered Building Regulations regarding the energy efficiency of houses in England and Wales. The details of these changes can be found in Part L of the Building Regulations.

The aim of these changes is to make housing throughout England and Wales more energy efficient and therefore reduce the negative impact they have on the planet.

In essence all double glazing must be:

• Governed by current Building Regulations which require Local Authority Building Control approval prior to installation.

• In accordance with higher energy efficiency standards.

If you choose an installer who is registered with a competent person scheme such as FENSA, Certass or BSI then they will take care of Building Regulations on your behalf.

An installer such as this will be able to provide evidence that all their work adheres to current Building Regulations, without the need to involve local authority building control.

Once your installation is complete, you will be provided with a certificate which acknowledges the quality of work.



Planning Permission and Building Regulations for conservatories can be a tricky subject. This is why it’s important to refer to the most relevant and up-to-date information.

This is why we recommend the Government’s Planning Portal. It is the best source of information for Planning and Building Regulation information for conservatories, orangeries and extensions.

What is a Conservatory?

Generally, a conservatory is seen as a build that is substantially glazed. Glazing makes up 50% of new walls, with 75% of the roof being glazed with either transparent or translucent materials.

The market for glazed extensions however, has developed and matured over the years. Enhancements have been made to the standard conservatory, meeting the demand for the aesthetic aspirations for today’s modern homeowner.

Having focused on improved aesthetics and functionality, these enhancements have created a cross-over between a conservatory and orangery.

Enhanced conservatories often incorporate additional external lightweight guttering or facade details. They may also feature internal pelmets around the perimeter of the conservatory with lighting features such as down lighters.

Enhanced conservatories will require Building Regulation approval through a recognised Building Control Body.

Due to the accepted definition of a conservatory, these roofs are still substantially glazed however, modifications and the intended use may result in a conservatory no longer meeting the requirements for exemption from Building Regulations.


A Permitted Development

Building changes to a dwelling can be made without applying for planning permission. These are allowed under Permitted Development Rights.

A conservatory is considered a permitted development, not needing an application for planning permission. However, if your answer is yes to the following then planning permission may be required.

  • Will your conservatory be seen from a road or public right of way?
  • Have you had any previous extensions?
  • Is your property a listed building?
  • Are you located within a Conservation Area or an area of Outstanding Natural Beauty (ONB)?

Click here to read more on conservatory requirements.

Planning regulations require all new extensions to be designed to match the existing house. Any new materials used must match as close as possible to the existing structure. This requirement also applies to buildings under permitted development rights.

A full planning application is usually processed within 10-12 weeks.


Building Regulations Criteria

This part of the regulations covers the structural ability of buildings. This part covers design, foundations and roof components, as well as walls and floors. Click here to read about section A.

Section B covers a buildings fire safety capacity. This includes safe escape routes and the prevention of fire spreading within the building as well as to other buildings in the vicinity. A building must provide secure access and have fire fighting facilities. Click here to read more on Fire Safety.

This section covers requirements for site preparation and resistance to contaminants and moisture. It is important that a property remains free from damp and condensation. It must be watertight and not at risk to contamination. Click here to view section C.

This part covers the technical guidance in relation to toxic substances. There must be no toxic substance permeating into the building when carrying out insulation to cavity walls. Click here for further information.

This part of the Building Regulations outlines the requirement for rooms and communal areas. The property must provide effective noise insulation. Click here to read more on approved document E.

Approved document F covers the requirements in respect to building ventilation. There must be an adequate level of ventilation in order to prevent condensation. Click here to read more on section F.

This part of the regulations sets the standard of sanitary conveniences and washing facilities.

Section H deals with the disposal of waste such as sewerage as well as solid waste from household refuse. Click here to read more.

This part covers the requirements for solid fuel, gas and oil heating appliances. Section J details the specifications for combustion appliances and fuel storage systems. Click here to read more on section J.

This section of the Building Regulations covers the design of staircases, landings, balconies and other raised areas. Click here to read more on section K: Protection from Falling & Collision.

Part L of the Building Regulations covers standards of energy efficiency and the design criteria for heating and water storage. Click here to read more on section L.

This section covers buildings facilities in regard to access. This includes the requirements for people with sight, hearing and mobility impairments. Click here to read more on section M.

Section N of the Building Regulations is concerned with glass in relation to impact, opening and cleaning. Click here for more information.

Section P applies to all electrical installation work in dwellings and gardens. This includes the certification of installation. Click here to find out more on Section P.



Your contracted retailer has the responsibility for ensuring the compatibility of all components used on the installation. This also includes the overall structural integrity of the structure. The contract should make clear the scope of the works that the retailer is responsible for.


Your neighbours should be informed about the intended work. If the intended conservatory overshadows a neighbour’s window, you may be affecting their ‘right to light.’ This could result in legal action so it’s important to consult with your neighbour before going ahead with installation.



Today’s Orangery design has been developed into a contemporary, fully structured building.

There are generally two types of orangery:

  • A structure built with brick piers and a parapet wall above the perimeter flat roof with roof lights incorporated into the roof.
  • A structure using similar flat roof technology with roof lights or lanterns but has the roof fitted to a directly glazed wall frame or solid infill panels and corner panels.

You will require Building Regulations if:

  • The orangery is opened permanently to the existing house
  • It does not meet the general glazing requirements of a conservatory


Adding a porch to an external door is considered to be a permitted development providing certain limits and conditions are met.

A porch is exempt from planning consent as long as it is subject to the following:

  • The ground area has been measured externally and doesn’t exceed 3m2
  • The highest part of the porch does not exceed 3m
  • The porch is not within 2m of any boundary that fronts a highway
  • It is seen as the homeowners’ responsibility to confirm whether the Permitted Development rights have been removed from the property.

Frequently Asked Double Glazing Questions

Frequently Asked Double Glazing Questions

Can Double Glazed Doors be Fitted with a Pet Flap?

Depending on the style of door, a pet flap can be fitted as an extra service. The only exception is when glass panels feature on the lower half of the door.

How Much Do Doors Cost?

Your double glazed door cost will depend on specifications such as style, size, locks, glazing and door furniture. Double Glazing on The Web gives you the opportunity to create your very own unique door quote online. Start your free door quote today.

What Does UPVC Stand For?

UPVC is an abbreviation for unplasticised polyvinyl chloride which is used in window frames.

Do UPVC Windows Need Trickle Vents?

Trickle vents are not a requirement, however they do offer additional ventilation without the need for opening your windows so can be a valued add on.

How Much Does A Conservatory Cost?

Your conservatory cost will depend on its specification. Your conservatory size, style, finishes, glazing and build are all factors which will determine the overall price. The good news is, you can now calculate the cost of your conservatory online using our handy online quote builder.

Do I Need Conservatory Planning Permission?

Conservatories are seen as a permitted development, however you may require conservatory planning permission if you have a listed property or if you are living within a conservation area.

Should I Buy A DIY Conservatory?

A DIY conservatory can be a great option if you have the required knowledge and building skills. It can be an expensive choice however, if anything should go wrong. The best thing about a supply and fit conservatory is that your installer takes care of all of the work for you, this includes any building requirements or planning permission.

Why Should I Buy A Conservatory?

A conservatory is an affordable way to extend living space and will prove to be a worthy investment over time. Not only does it help improve the value of your property but it provides you with a multi-functional space to use all year round.

What is The Best Type of Conservatory?

When choosing the best type of conservatory for your home, your property and garden size as well as style have to be considered. For example if you lack garden space, you don't want a conservatory build that is going to be too overpowering. There are conservatory designs for all types of home and specification so any property, traditional or new can benefit from this airy extension.

How Long Will It Take To Install My Casement Window?

Because every job is different, it is best your talk to your double glazing installer who will be able to give you an exact timescale.

Which Bi-folding Door Configuration is Best?

When choosing the arrangement of your bi-folding doors you need to consider the size and layout of your room. Outfolding bi-fold doors will take up less internal space when completely folded back and a left of right folding will be dependent on space available in your room.

How Long Does It Take To Install Bi-Fold Doors?

If a survey is scheduled within 48hrs then your bi-fold doors can be supplied and installed within just 6 – 8 weeks.

How Secure Are Bi-Folding Doors?

Bi-folding doors are extremely secure and are built with a high security locks as standard. Each of our double glazing installers will offer their own range of locking systems with additional upgrade options for all security conscious homeowners.

Are There Other UPVC Casement Window Styles?

Other UPVC casement window styles include the French casement window which is a more traditional take on the standard casement style.

Will I Have A Choice of Casement Window Locks?

A high security lock will be fitted as standard with your new casement window but your double glazing installer will also offer a choice of security upgrades.

What Are Flush Casement Windows?

Flush casement windows are where the unit sits flush to the frame, creating a super sleek look.

Are There Different UPVC Casement Window Sizes?

UPVC casement windows come in a wide range of sizes to suit your property. You can specify your casement window size in our window cost calculator to get a unique window price!

Can I Choose My Casement Window Handles?

Your double glazing installer will offer you a choice casement window handles and casement window hardware options so you can achieve the perfect look.

What is a Casement Window?

A casement window is attached to its frame by one or more hinges. A casement window is hinged at the side allowing them to open extremely wide. These windows can double up as emergency exits and are perfect for hard to reach places within the home, with many home owners installing these windows behind their kitchen sinks.

Where Can I Get A Tilt and Turn Windows Price?

You can get a tilt and turn windows price using our window cost calculator which will give you a free and unique quote within a matter of minutes.

How Does The Tilt and Turn Window Mechanism Work?

The tilt and turn window can be ‘tilted’ inwards due to its unique turning action which allows the window to be easily accessed from both inside and out. All it takes is a swift turn of the handle.

How Much Do French casement windows cost?

The cost of French casement windows will vary depending on installer but you can get an average casement windows cost using our free online quoting engine

How do UPVC Sash Windows Work?

UPVC vertical sliding sash windows are built to either slide vertically downwards or upwards. This opening function makes the UPVC sash window much easier to use compared to traditional wooden windows where the only choice is double hung and single hand.

Are UPVC Sash Windows Easy To Use?

UPVC sash windows are very easy to use. Their spiral balance mechanism allows for smooth operation so you can open and close your windows with ease. UPVC sash windows are also incredibly low maintenance and require very little cleaning.

Why Should I Choose a UPVC Sash Window?

UPVC sash windows are incredibly attractive and make a stunning addition to any property and are relatively low maintenance thank to their UPVC design. You can enjoy a traditional aesthetic for many years to come thanks to their long standing properties.

Replacement Sash Windows In A Conservation Area

If your home is a listed property or within a conservation area then you will need to seek planning permission.

Are uPVC Doors Easy To Maintain?

uPVC doors are extremely easy to maintain and will never require re-painting or varnishing. Neither will a uPVC door rot or warp!

What Are Composite Doors Made Of?

Composite doors are made of a combination of high performing materials which is why they are so strong and incredibly long lasting. The composite door is made from: reinforced UPVC, fibreglass skin, high density foam and a water resistant composite materials.

Do Composite Doors Fade?

Composite doors feature a tough and durable skin where colour runs throughout rather than a simple surface coating. This means a composite door is not likely to wear or fade like the majority of painted doors. A composite door is very long lasting which also reduces the amount of maintenance required to keep it looking in top condition.

Do Composite Doors Need Painting?

Composite doors do not require re-painting. These low maintenance doors feature a water resistant GRP, coloured skin which keeps a pristine appearance year after year.

Do Composite Doors Warp?

A composite door will not warp like wood and won't require regular painting.

Can I Get Composite Side Panels?

Composite doors are available with matching composite side panels, your installer will offer you a choice of colours and glazing.

Is Every Composite Door Different?

There are different qualities to every composite door and they will vary between manufacturers depending on materials used. At Double Glazing on The Web we only put you in touch with the highest quality suppliers and installers.

What Do Stable Doors Look Like?

These country style doors offer charming aesthetics and are a stylish alternative to standard back doors, stable doors a great choice for any kind of property. This door is split in two halves which open independently from one another as well as function as a whole. Whether you are after a traditional stable door or more contemporary design with modern glazing, your double glazing installer will be able to offer you a wide range of options for your property.

Are UPVC Stable Doors Made To Measure?

Your UPVC stable door will be made to measure and tailored to your specifications given to your double glazing installer.

How Much Do UPVC French Doors Cost?

UPVC French door prices will depend on your personal requirements and specifications such as size, style and glazing. To get an average French doors cost use our door cost calculator for a free online quote.

Are UPVC Patio Doors Secure?

UPVC patio doors can be fitted with a choice of high security locks to make them extra secure. You can also choose from a range of glazing styles to further enhance the strength of your patio doors.

Do I Need Planning Permission For Patio Doors?

You may require planning permission for double glazed patio doors if you have a listed building or happen to live within a conservation area. Visit the V for more information.

How Do Sliding Patio Doors Work?

UPVC sliding doors operate on a smooth, easy glide system which allows for effortless transition. They are attached to metal or vinyl tracks which are fitted to the top and bottom frames and plastic rollers are added to ease the movement.

How Do Slide and Swing Doors Operate?

A multi-pane door with individual panes slides on a single track with no loss of space. Panes are able to operate individually with no visible hinges or hardware. The slide and swing door can open up spaces between rooms or between home and garden or even conservatory.

Bay or Bow Window?

Simply put, it really depends! Bay windows offer often much welcome and useful extra storage space to the frontage of homes. On the other hand, bow windows provide a curved shape alternative in terms of look compared to bay windows. They are both beautiful options and can add much character and charm to the right property.

Can Bay Windows Look Modern?

Bay windows can easily be either modern or traditional depending on the combination of glass and / or coloured uPVC profiles now available. Subsequently, its easy for these windows to seamlessly blend in with contemporary or old properties.

Can Double Glazed Windows Reduce My Heating Bills?

When you install double glazing in your home or commercial property, it is likely that the extra heat retention will lessen the need to use central heating systems. In turn, this could mean you see a drop in heating bills. If you are concerned about your energy bills, it is easy to compare business energy or home energy online.

What Makes Flush Sash Windows Different?

Flush sash casement windows are specifically designed to imitate the appearance of traditional wooden timber windows by appearing to have the same sashes that finish 'flush' with the outside face of the window.

How Much Is A Conservatory?

A Conservatory is cost-effective way of expanding your home without needing planning permission in most cases. Conservatory prices start around £6000. Please refer to our pricing guides below to see how much a conservatory may cost you, or start a quote today.

Can Conservatories Only Be Made Out Of uPVC?

Conservatories can be made out of uPVC, timber and aluminium – it really depends on the style you want for your home. However, uPVC is the cheapest material to make a conservatory out of; timber and aluminium are significantly more expensive. Please check our pricing tables below to get more of an idea on costs or start a quote with us today.

Do I Need Planning Permission To Build My Conservatory?

In most cases, you do not need planning permission for a conservatory, however, it must reach certain guidelines. For example, it cannot exceed the height of the original structure of the home. Please check your local council site for more details (links are found in the 'Gateshead Information' section).

How Long Will My Conservatory Last?

Depending on the materials used to build it, the installation and the general maintenance for a conservatory, they usually have a life span of anywhere between 10-30 years. UPVC conservatories, on average last about 20 years.

How Much Does a Conservatory Cost?

Prices on conservatories begin around £6000, however, this will be dependent on the shape, size and style of your conservatory. Please refer to our pricing table below to get a better idea on how much a conservatory will cost or start a quote with us today.

What Materials Can You Build A Conservatory With?

Conservatories can be constructed with either timber, aluminium or uPVC, the latter being the cheaper material out of the three. Please consult our pricing guide below to get a better understanding of what a new conservatory may cost you.

Should I replace my old sash windows?

Sash windows are a key feature for many traditional period buildings. Sash windows were traditionally built using timber, which is fairly high maintenance and has a tendency toward rotting and warping. Over time, these windows can become draughty and insecure. uPVC sash windows are a great way to experience the benefits of modern double glazing, without sacrificing the aesthetic of your home. uPVC sash windows will not rot or warp and require little maintenance. They are also thermally efficient, which means that your home will not require as much heating.

How much does sash window restoration cost?

The cost of sash window restoration will depend on the survey result. Standard draught proofed sash windows (without sill replacement) usually starts at about £500 per window. The time taken will also depend on the survey result.

Can I install double glazing into my original sash windows?

This will depend upon what type of window you have. Replacing existing moving sashes with new, double glazed replicas might to be possible.

How much does it cost to replace a sash window?

The cost of replacing a sash window will depend on many factors including: style, size, material and glazing. A wooden sash window will cost significantly more than a uPVC sash window. A wooden sash window can cost up to £1000. Wooden windows are more expensive to manufacture so expect to pay that bit more. uPVC sash windows can be designed to mimic wood and are much cheaper in price. The starting price for a standard uPVC sash window is on average £525.


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