10-20K (if you do not need to remove the roof structure.) You will likely have small timber ceiling members with insulation which can’t carry the load of another floor on top. Therefore, you can remove the existing ceiling floor and form a new floor with new timber joists, usually fixed to two steels which span between your two (edge) cavity walls. If you have your loft roll insulation at your ceiling level you will also need to upgrade the existing rafters/roof with new insulation to meet thermal regulations.

Should you require the removal of the roof to add loft height, or a dormer extension then this would incur further costs, of course for additional timber rafters, tiles and dormer walls/roof. Other items you will likely want are skylights and a good interior design finish.

You can convert your loft without the need for applying for planning permission. Be sure to check that your property is not listed or in a conservation area first as any changes to these types of properties (i.e., skylights in roof) will require permission.

1-3 months. Depending on the size, material sourcing and project management and communication.

In most cases, yes. It will add an additional bedroom to your property and increase the overall value. We would advise that if your existing head height (at the highest point) is less than 2.2m you will struggle to convert it without further roof works or raising the ridge. If it is over 2.2m then you will have enough space to upgrade the rafters with insulation and plaster boarding along with the floor upgrade, keeping the cost down and getting you good value for your pound.

By purchasing the materials, you need first, ready for a builder to install. You will firstly need a structural engineer to calculate the new floor upgrade and the timber joists/steel beams you will need. Once you have the specification of these you can order them and purchase other materials such as the insulation and membranes for the roof. Use https://www.stairbox.com/stairbuilder/?hash=SB-G6K7K to design your stairs and order them in MDF. Order a 30-minute fire resistant door and this should mean you only need to pay for the labour and construction. A word of caution is to make sure you check all the regulations and plan your conversion first. If something goes wrong, you can end up spending more money and time trying to cut corners which is why we advise you hire an architect or designer to make sure all of this is covered.

Dormer loft conversion can cost up to the same as some extensions. If you are just converting the existing loft space then this generally will work out cheaper than an extension

Firstly, is to make sure you have the finances in place. 10-20K for a conversion into a room without a dormer and 40-50K for a loft conversion with a dormer. Find a location for the new staircase and try and check the existing head height in the loft. If it’s less than 2.2m it will be difficult to convert into a room without removing the roof. Save some designs and have a rough idea of the interior design space you want to achieve. From there we would advise you employ a professional designer to help you through the process and produce the plans.

In most cases you are within your permitted development rights to convert your loft. You can install skylights in the roof as these are also part of your permitted development rights. If you are looking to erect a dormer extension, then this is also covered under your permitted development rights. You will require building control sign off certificate and we would also advise that you obtain a Lawful Development Certificate. This is written confirmation from your local authority that you have completed the works under permitted development guides. It will also be a useful to have if you come to sell your home.

We suggest you get in touch with us for some free advice to see if your loft conversion will need planning permission.

1.9m. We would advise that if your existing head height (at the highest point) is less than 2.2m you will struggle to convert it without further roof works or raising the ridge. If it is over 2.2m then you will have enough space to upgrade the rafters with insulation and plaster boarding along with the floor upgrade.

When you upgrade your loft, the low-level partition walls will give a small void each side towards the eaves, this is ideal space for storage and to remove all of that clutter and hide the Xmas tree.

You will need to install a new smoke alarm system and ensure you have a protected staircase. This will require you to install a fire door at the bottom or at the top of the proposed staircase. The staircase should lead down to your existing landing and act as a direct escape route out of the property.

We would advise that you hire a professional, unless you are certified and have the accreditations in construction to supply the documents you will need for building control sign off at the end of the works. For example, you will need to provide a Part P electrical safety certificate to your building control officer to ensure the works have been installed safely and to the correct standards.

40-50K. You will need to remove a lot of the existing roof structure and include new steel beams to take the load of the new floor and dormer roof. Consider extras such as the demolition/removal amount for skips, scaffolding, machinery, insulation, new rafters, tiles, membranes, steels, joists staircase and your internal specification/design requirements. You may also want an ensuite to go with your new bedroom.