Undertaking a basement conversion or excavation is a huge project and something that will cost a considerable amount of money. Therefore, it’s really important that you get everything right and plan ahead. Start by asking these questions.
What will you use the basement for?
If it’s extra space you’re after, or a new bedroom, you’re better off with a loft conversion. Really evaluate what it is you’re lacking in your house before you start the project. Basement conversions are ideal for cinema rooms, play rooms or an extra sitting room, as very little or no natural light will find its way in.
Is your home ideal for a basement conversion?
Get in a tradesman who specialises in basement conversions, they can assess if your property is able to be altered. The best properties for basement conversions are terraced or semi-detached homes, which are unable to extend up into the loft or already have been extended.
Victorian properties which have timber-suspended floors are also suitable, as this means work can be carried out from the outside and you don’t need to vacate the property while work is under way. If you need to dig more than 1.2m under your existing foundation you will need a specific type of risk insurance, ensure your builder has this.
Do you have planning permission?
As long as you convert an existing cellar and don’t change the structure and external appearance of the property, you generally don’t need planning permission. An excavation is different however, especially if you’re adding a light well. In all cases you need to apply for Building Regulations, which cover fire escape routes, ceiling height, damp proofing, ventilation and electrical wiring.
Have you given notice to your neighbours?
If you live in a terraced house and you share walls and foundations with other properties, you need to give your neighbours notice about the planned work. The Party Wall Act of 1996 will prevent any disputes down the line and in addition, you’ll be able to include your neighbours in your plans and manage their expectations throughout the project.
How will you replace natural light?
Think if your planned space will work without natural light. Light pipes (cylindrical shapes that use reflective surfaces to stream light into the space below), window wells (a double-glazed window that lays on the ground and passes light down to the basement), mirror-bases systems or glazed ceiling panels might work particularly well. Bear in mind however, that projects like these will add a considerable cost to your final bill.
How will you damp proof the basement?
The key to a basement conversion or excavation is the damp proofing. Damp won’t be able to dry up in a space without direct natural light, so this is an essential issue to tackle. The best method is the water membrane system, although it needs to be executed flawlessly, otherwise it will still lead to a damp problem. Ventilation shouldn’t be overlooked either, as damp can create a musty smell in your property. Your builders will line the basement with a studded membrane, which is sealed to walls, ceilings and floor. Then a secondary wall is built inside this lining, made up of plasterboard, screed or a floating timber floor. A pump and drainage channel then ensures any water that seeps through the property is pumped away.
The information contained within this article is strictly for guidance only. Rated People recommends that you always check current sources of information in case regulations have changed. Rated People cannot accept any liability for miscommunication of the law in the case of a change in regulation or any action done to a property based on the information held in this article. Rated People © 2013.
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