How much would a single story extension cost?
Single storey – A single storey extension in London will usually cost between £2,000 and £3,000 per sqm (£185 and £280 per square foot). £2,000 per sqm would represent cost-effective finishes and products.
Do I need planning permission for a extension?
Extensions of more than one storey must not extend beyond the rear wall of the original house by more than three metres. Anything more than three metres and you would require planning permission for the extension. The maximum eaves and ridge height of your extension must be no higher than the existing house.
Is a small extension worth it?
Even if your budget is small, a well thought-through addition to your house can make a tiny dining area more usable or create extra space for a home office. Extensions also can enhance natural light, link existing areas of the property, and improve the overall design, letting a space breathe a bit more.
What adds more value an extension or conservatory?
Conservatories tend to add less value to a home than an extension. Using your local price per square metre is a good guide to get a rough idea of how much value you could add, but err on the side of the lower estimates as a conservatory is often not considered a full room when it comes to valuation.
Do you need planning permission to turn a conservatory into an extension?
The answer in most cases is no. Normally planning permission isn’t needed to convert your conservatory roof. However, building regulations may be required. A full survey will need to be carried out to ensure your conservatory extension can take the weight of a tiled roof.
Is it cheaper to build a single storey or double storey extension?
Bear in mind too that the cost tends to be lower than that of a double storey extension because it will need less substantial foundations and steelworks. However, two storey extensions are more cost-effective per square metre, so consider your options carefully. And, for advice on managing the cost of an extension you can visit our ultimate guide.
How much does a 4m x 5m single storey extension cost?
With these added, the lowest build cost for a 4m x 5m single storey extension would be just shy of £40,000, with the upper end nearer £58,000. Don’t forget too, that in certain parts of the country, such as London, costs will be significantly higher.
What are the main fixed costs of building an extension?
Two of the largest fixed costs in constructing an extension are the groundworks/foundations/slab and roof. The specification and cost for a set footprint and roof layout will not vary whether the design is single storey, two storey, or three storey, yet the overall area of the design will increase substantially, spreading out the cost.
What does cost per square metre mean for an extension?
The cost per square metre figure allows for a finished extension, excluding kitchens, utility rooms, cloakrooms, bathrooms and shower rooms, and external landscaping. Do the figures include VAT?