Adding a conservatory or new double glazing are effective ways of updating an old building and boosting its value, according to one planning expert.
Writing in Newcastle's Journal, solicitor Paul Courtine pointed out that many potential homebuyers are attracted to older properties as they "usually have a lot of character", although energy-saving considerations are equally important.
He noted that with a "normal" house, home improvements can be usually be carried out inside with no complications.
"You can often do some works to the outside as well, such as installing a conservatory or getting double glazing," he remarked.
With listed buildings however, strict protection against alterations and demolition means official permission is required to install replacement windows or doors, or similar home improvements.
"If you are thinking about carrying out any works, you should always get advice as soon as possible," Mr Courtine concluded.
Planning minister Caroline Flint announced last month that green homes will be easier to achieve for many Brits as permission is no longer necessary to install energy-saving devices such as solar panels.
Double glazing windows and doors can increase the value of your property, as well as saving you money on your heating bills. Take a look at some of the Energy Efficiency-certified windows and doors on the Safestyle website.
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