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Glass is a compelling building material when you want to build outstanding architecture. In London, it is not only a contemporary style statement but also a space-enhancing approach for home extensions. The frameless conservatory or the glass box extension never fails to impress, even in the most niche spaces. Glass house extension London affords you a profusion of natural light, views and keeps you better connected to the garden for greener aesthetics. The see-through quality of glass leaves your home’s original architecture unhindered. We build bespoke structural glass extensions of superior quality designed by experts for your needs, comfort, and spaces.

No, glass extensions do not need conventional foundations required for solid structures. They only need concrete pads for supporting the legs or base ends of glass walls or glass doors. It is a plus point for securing planning permission.

The types depend on how seamless you want the extension to be. Framed glass extensions have more prominent lines and edges, and frameless ones have cleaner lines. Frameless versions can be either slim framed or completely frameless. Slim framed extensions have thinner frames and look more minimalist. These use aluminium or stainless steel for borders and support. Framed constructions, too, use aluminium and steel for the frames, but they also use uPVC and wood. Entirely frameless glass extensions use structural glass units supported with laminated glass beams and fins.

When it comes to the glass itself, there is a wide range of coatings to consider. Glass with thermal efficiency reduces energy consumption, extra clear glass offers greater light penetration and transparency, advanced security glass provides maximum protection from impact, and privacy glass affords more obscurity. You can also choose solar control and heated glass for your house extensions. High-performance double and triple glazing brings solidity, noise control, and energy efficiency to your new space. Solar control coatings help keep your glass extension from overheating in warm weather.

Your glazed extension can have fixed or opening panels. A sliding door or a bi-fold door creates the perfect opening solution. Infinity fine-line sliding doors seamlessly incorporate into a frameless glass box extension. Your extension can have either a solid roof or a glass roof. A double-storey extension needs a solid roof and metal frames that can support a second floor. Smaller spaces benefit more from a glass roof, especially Side Infill extensions, which have a solid wall along the party wall line. Low maintenance coatings help reduce maintenance and cleaning on upper floor glass structures.

As long as Permitted Development Rights apply, you do not need planning permission. PD rights only apply to properties that are not on designated land or listed. For your project to continue without seeking approval, it needs to comply with guidelines including the following;

  • Only 50% of the land around the original house contains extensions.
  • A conservatory cannot exceed 3m and 4m respectively from the original rear wall of terraced/semi-detached and detached property.
  • Extensions are no higher than the highest part of the original roof or higher at the existing eaves.
  • The height of a single-storey extension is limited to 4m.
  • The width of a Side storey extension cannot exceed 50% of the existing property’s full width.
  • Single-storey rear extensions should not extend beyond the property’s Rear wall by more than 6m if semi-detached or terraced or by 8m if detached. This new limit needs prior approval and implementation of a neighbour consultation scheme.
  • Two-storey side-facing windows must be obscure-glazed and any opening 1.7m above the floor.
  • There can be no alterations to the roof of the original house.
  • Roof pitch must match the existing as far as possible.

The structure requires building regulations approval to avoid any future litigation. Extensions that involve boundary walls need Party Wall Agreements.

Knowing how to integrate glass into a property’s style and build enables modern and chic creations, as well as seamless elegance that preserve the authentic integrity of the building.

  • When it comes to framing options, use dark colours for exposed brickwork for a more under-the-radar look. To complement your brick house, you can leave the Side extension border wall exposed too.
  • A double-storey glass extension evens out the look with better symmetry and height for less contrast.
  • A solid roof that matches the exterior of the original house helps the extension to resemble the original architecture.
  • Glazed aluminium framing reflects the surrounding blending into the background to minimise sightlines.
  • A courtyard-style extra space creates a dining and sitting area that merges with the garden without seeming to limit outdoor space.
  • You can use a pitched or sloping roof to keep in line with traditional home designs.

We are a 100% bespoke design-led home remodeling company with expertise in Victorian and 1930s properties in London. Our team of highly-skilled architects draws professional designs that are unique to your home and your lifestyle. We use experienced craftsmanship, premium-grade materials, and the latest in construction technology to create stunning extensions. Our full-service design and build processes eliminate stress and hassle. We secure planning permission for you and assist in Party Wall Agreements and other legal necessities.

There is no pressure to sign a long-haul contract with us as we give you the option to commit to one phase at a time with separate contracts for design and build stages. We offer project management throughout the build phase to ensure a high-quality finish and work efficiency for timely completion. All projects begin with full cost transparency, so you know exactly how much you would be spending for what. Our finished products carry insurance backed warranty.

Get a free consultation and itemised quote to build lasting quality bespoke glass extensions for your property with Good Design & Build.

Don't move. Extend in style

We can save you the hassle that comes with moving not to mention the heavy stamp duty! Adding an extra loft bedroom or enlarging the living kitchen dining space on ground floor is an economical way of transforming your home to suit growing needs. The projects can range from £40-100K depending on your requirements and can be completed within 8-16 weeks.

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How we deliver projects

Our process is simple and divided into two distinct phases with separate contracts: Design and Build. As a client you only commit to one phase at a time depending on what stage of the process you are in. Each phase consists of three stages as described below.

1. Design

This is the kick-off point for your project. We carry out a complete architectural measured survey of the property. This allows us to create accurate CAD design drawings. This is followed by a design meeting to start discussing your ideas in more detail.

2. Planning

At this stage we finalise the designs with you and start preparing planning applications as needed. We place a high priority on ensuring that plans, designs and schedules are all based on a thorough and detailed understanding of planning guidelines. We co-ordinate with local authorities until the decision is made, and the planning approval is secured.

3. Technical

Once the planning consent is secured, we translate the design drawings into more detailed technical drawings for the purposes of building control and construction. This also includes specifications and structural calculations. At this stage, we will also submit to you our ‘no obligation’ quote for the build phase.

4. Pre-build

90% of our clients decide to stick with us after the design phase is completed. Once the build contract is signed, we kick off the process by making sure all the pre-build processes are complete. These include assistance with party wall agreements, Thames Water build over agreement, submitting building control application, and preparing method statements etc as needed. This stage ends with a pre-start meeting with your foreman before the actual build begins.

5. Build

One of our foremen will be dedicated to your project and will be on-site to manage everyday works. Our project managers will be overseeing the works to make sure they are completed to high standards, within your budget and on time. Throughout the process we will keep you updated with the progress and coordinate the works with third parties such as kitchen or flooring suppliers. We will also advise and guide you to choose any suppliers if needed.

6. Handover

As the build draws to finish, we will help to iron out any ‘snags’ to make sure everything is completed to your satisfaction. We will put together all necessary certificates such as gas, electricity and building control completion along with warranties for glazing, boiler etc. At the final completion meeting, we will hand you these documents, together with the keys to your house. Needless to say, you can contact us any time after this, if you want us to look at something.

This is the kick-off point for your project. We carry out a complete architectural measured survey of the property. This allows us to create accurate CAD design drawings. This is followed by a design meeting to start discussing your ideas in more detail.

At this stage we finalise the designs with you and start preparing planning applications as needed. We place a high priority on ensuring that plans, designs and schedules are all based on a thorough and detailed understanding of planning guidelines. We co-ordinate with local authorities until the decision is made, and the planning approval is secured.

Once the planning consent is secured, we translate the design drawings into more detailed technical drawings for the purposes of building control and construction. This also includes specifications and structural calculations. At this stage, we will also submit to you our ‘no obligation’ quote for the build phase.

90% of our clients decide to stick with us after the design phase is completed. Once the build contract is signed, we kick off the process by making sure all the pre-build processes are complete. These include assistance with party wall agreements, Thames Water build over agreement, submitting building control application, and preparing method statements etc as needed. This stage ends with a pre-start meeting with your foreman before the actual build begins.

One of our foremen will be dedicated to your project and will be on-site to manage everyday works. Our project managers will be overseeing the works to make sure they are completed to high standards, within your budget and on time. Throughout the process we will keep you updated with the progress and coordinate the works with third parties such as kitchen or flooring suppliers. We will also advise and guide you to choose any suppliers if needed.

As the build draws to finish, we will help to iron out any ‘snags’ to make sure everything is completed to your satisfaction. We will put together all necessary certificates such as gas, electricity and building control completion along with warranties for glazing, boiler etc. At the final completion meeting, we will hand you these documents, together with the keys to your house. Needless to say, you can contact us any time after this, if you want us to look at something.

Featured Projects

Interior View - Sellons Ave Project

Harlesden

Sellons Ave NW10 4HJ

The project included creating a master bedroom in the loft with an adjoining terrace.

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Fulham

Orbain Road SW6 7JZ

This project was completed in 2023 and the approximate budget was £101,000.

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Kitchen Extension in East Sheen

Lambeth

Hetherington Road SW4

We completed this stunning project for our client Angus in Lambeth.

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Teddington

Station Road SW4 7PA

We completed this exciting project for our clients on Station Road, a quaint residential area in the heart of Teddington.

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Leyton

Windsor Road E10

We completed this kitchen extension on Windsor Road, a charming residential street nestled in the heart of Leyton.

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What Our Clients Say

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Build a Quote!

Let's get started with building your own bespoke quote for your dream extension. Tell us as much in detail as possible to get most accurate price.

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Build a Quote!

Let's get started with building your own bespoke quote for your dream extension. Tell us as much in detail as possible to get most accurate price.

Get Started