It's worth doing your sums before embarking on any renovation project. There are more costs than you might otherwise imagine.
Your buying costs include more than just the cost of the house. For example, the typical fees on a purchase of £275,000 are as follows:
Mortgage arrangement fees: these vary hugely, say £800
Land Registry fees: £220
Local authority search: £110
Stamp Duty: £3,750 (see below)
Stamp duty is charged by the government on all house purchases. The rates were changed in December 2014 to create a tiered system (like income tax) as follows:
You also need to estimate the cost of actually restoring the property in question. This can vary massively depending on whether you are intending (for example) to put plastic bath in for £2 off ebay, or a circular copper bath for several thousand pounds.
Here is a list of the estimated costs of some renovations:
Loft conversions: £20,000 - £40,000
Extensions: £900 - £1,400/m2
New bathroom: £6,000 - £12,000
New kitchen: £6,000 - £25,000
House rewire: £3,000 - £5,000
New heating system: £4,000 - £8,000
Projects usually run over-budget, so it's best to include a contingency budget of at least 10% of all your estimated costs for when things do not go according to plan.
Don't forget you will also have ongoing living expenses, especially if you are giving up work / renting a separate property while work is carried out on your project.