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Good Design & Build’s Beginner’s Guide, a smart way to achieving your perfect home.

If you live in the beautiful artsy riverside Hammersmith and its surrounding areas, then moving to a new house or location should not even cross your mind. Instead, look at loft conversions Hammersmith to add much needed extra to your home in Hammersmith and continue to enjoy all the benefits of leafy walking trails along the River Thames.

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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If you’re looking for some extra space in your home, without the hassle of an extension or moving into a larger house, then loft conversions Surrey are a smart way to achieving your perfect home.

As loft conversion specialists Surrey, our guide will help explain many of the steps and actions needed for smooth loft conversions Surrey, from local planning regulations, to costs, and even the type of loft conversion best suited for your roof structure.

If the home has reached its capacity it is well worth pursuing a loft conversions Surrey. It will provide the home with additional space whilst also adding to the property value. However, converting your loft requires careful consideration and careful planning, which is where the expertise and guidance of a loft conversion architect will be essential.

Some of the areas to consider are:

  • Planning permission
  • Building Regulations
  • Suitability
  • Fire safety
  • Staircase
  • Ceiling joists
  • Loft insulation

Planning Permission for loft conversions Surrey

Does a Loft Conversion Require Planning Approval?

As you are not changing the existing footprint of the dwelling loft conversions are known as Permitted Development (PD). The design of the project will have to conform to a number of requirements.

There are some exceptions to this rule and planning permission will be needed if:

  • Property is listed
  • Property is located in a conversation area
  • You wish to extend beyond the limits of the Permitted Development.

As a rule of thumb, we will always check with the local planning office before starting any work.

Building Regulations for loft conversions Surrey

Building regulations differ slightly from planning permission and whereas you don’t always need planning permission, you will need to obtain building regulations approval.

A building control surveyor will inspect your loft conversion during various stages and will also be responsible for issuing a completion certificate upon the final inspection.

During the building regulation phase, it will be clear if the works fall under the Party Wall Act. If you have a semi-detached or terrace you are required to notify your neighbours of the planned work.

Loft conversion suitability

When assessing your loft space’s suitability for conversion you have to consider a number of various factors:

  • Roof structure
  • Roof pitch
  • Available roof height
Structure

Traditional frame type roof structures are often the most ideal for a loft conversion. Opening up the space is relatively easy and inexpensive.

Trussed roofs will be a little more complicated as they may involve inserting new steel beams between loadbearing walls.

Pitch

The higher the angle of the roof pitch the higher the central head height is likely to be. Special designs can be created to use the dormers or redesigning the roof to create a floor area that allows consistent headspace in the entire room.

Roof height

When you measure from the bottom of the ridge timber to the top of the ceiling joist, you need to have at least 2.2m of usable space for a conversion to be suitable.

This will create the loft conversion but living space needs to be taken into consideration. Although there are no firm building regulations on ceiling height, you should consider at least 2m of headroom to accommodate the staircase.

If your property does not have the desired height, there are two options available:

  • Raise the roof
  • Lower the ceiling in the room below

Fire safety

If the property is a single storey you will need to ensure that the new windows are large enough and low enough to escape from.

With a two storey property, things get a little more complicated. The loft conversion will transform the house into a three-story property. Escape windows which are over 4.5m from the ground are prohibited. If this is your only option, you are required to include a protected stair enclosure to lead straight down to the final exterior door.

Staircase

Available height is always one of the most important considerations of all loft conversions. The best location for a staircase is in line with the roof ridge. Other factors are:

  • The minimum height requirement above the pitch line is 2m, although this could be reduced to 1.9m in the centre, and 1.8m to the side of a stair
  • The maximum number of steps in a straight line is limited to 16
  • The maximum step rise is 220mm

Ceiling and Floor Joist

The majority of loft conversions will require new ceiling joists as the original joists are unlikely to be able to support a conversion floor (it’s not what they were originally designed to do!).

The new ceiling joists will span between load-bearing walls. They will be raised slightly above the existing ceiling plasterwork by using spacers below the joist ends. This spacing must be sufficient to prevent any new floor joist deflection from touching the ceiling plaster below.

The new floor joists of your loft conversion will need to offer at least 30 minutes’ worth of fire protection, which could mean re-plastering the ceilings in those first floor rooms below.

Loft insulation

A loft conversion can be insulated in two separate ways.

The simplest method is to use a ‘cold roof’ method. This is achieved by filling the space between the rafters with slab foam insulation and then ensuring there is enough space between the roofing felt and the insulation.

The second option is known as a warm roof loft insulation. This method uses materials such as covering capping over the rafters, tile battens and tiles.

The internal partition walls use a quilt that will provide sound insulation. Plasterboard is attached to one side of the wall then the quilt is inserted, followed by plasterboard on the other side.

There are quite a few recommended loft conversion companies Surrey for you to choose from to embark on this house transformation journey. Get in touch with us at Good Design & Build and let us be your trusted loft conversion partner.

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.

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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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