Bespoke Design & Planning

Over 12 Years of Experience

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The same home. A different experience.

Loft conversion is a great way to accommodate a growing family without having to move, and to also add more value to your property. The building process is quite non intrusive with most of the access done via scaffold. A standard dormer loft conversion starts at £40K and the build is completed in 8 weeks. Our team will work closely with you to maximise light, space and storage.

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.

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.

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What Our Clients Say

Frequently Asked Questions

We’re committed to delighting our clients, as much with our approach as with our solutions. Our values run through every aspect of what we do – from the moment you commission us, to the moment we hand over the keys.

Loft conversion costs in London are £40,000 to £70,000 on average excluding VAT and fees. The costs will vary depending on the size and complexities of the conversion. Good Design & Build loft conversion costs are as follows:

  • Room in the roof conversion (basic) – £1,150 – £1,350 per square metre
  • Dormer loft extension – £1,250 – £1,450 per square metre
  • Mansard extension – £1,500 – £2,500 per square metre
  • Hip-to-gable extension – £1,500 – £2,500 per square metre
  • Change of roof structure – £1,350 – £1,550 per square metre

Generally loft conversions fall under permitted development and you do not need planning permission. Although this may not apply to certain properties that are in conservation area or the loft conversion needing to raise the ridge height. You can find more information here.

Not at all. The old water tank can be decommissioned by our qualified plumbers. Chimney can either be boarded out or totally removed to create more floor space depending on your requirement.

You can easily check this if you have loft access hatch and ladder. Try and measure the distance from top of your first floor ceiling joists to the underside of loft ridge timber. You need minimum 2.5M to achieve the floor to ceiling height of 2M which is minimum requirement. If your loft height falls short of 2.5M, you my need to drop the first floor ceilings to achieve minimum height.

It normally takes approx. 8-10 weeks to complete a loft conversion depending on the type and size.

If your property is suitable for a dormer loft conversion and you are in the need of extra space in the house, you should definitely consider the loft conversion. It is the most economical way to maximise the potential of your property and create more space without having to move.

Loft conversion is the best way to add value to your property. Recent research carried out by the Nationwide Building Society has stated that a loft conversion could add up to 20% to the value of your home. If your property is valued at £500,000, that’s a whopping increase of up to £100,000!

Simply put – YES. Lot conversion is cheaper and less disruptive as compared to an extension which involves foundation, brickwork, etc. Loft project usually requires a steel and timber construction which is quick and economical.

Yes, they certainly do. Research carried out by Nationwide UK confirms that the property price increases as a result of converting your loft. Loft conversions create extra usable space. It makes your property more appealing to buyers. Extensions, which comprise a double bedroom and bathroom can add 20% to the value. One extra bedroom can raise the value by 10%, while an additional bathroom can increase property value by 5%.

Yes, it’s possible. While Victorian and 1930s properties are much easier to convert, new build homes can get the same treatment with extra help. The W-trussed roof of a new build should have the recommended ceiling height of 2.4m to 2.6 m for a loft conversion. By strengthening roof support, sometimes with steel beams, conversions can be accomplished.

There are building regulations on insulation, and they must meet minimum energy efficiency values. If your loft conversion is creating livable space, then, you need warm loft insulation. Insulating over the rafters with tiles, cover cap, and tile battens will create a warm loft. A cold loft, used for storage only, will have insulation between the rafters, often with slab foam.

A minimum of 2.0m roof height is required. If not, raising the roof or lowering the ceiling below will provide the necessary height.

Yes, design-led plans are the most successful, and you can create bespoke designs that fit your home and requirements with an architect’s help. Architects at Good Design & Build provide advanced CAD design drawings for each client.

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

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