A 48-page council document has been drawn up to say which windows and doors are acceptable. 

Necessary due to 'limited guidance' being available to Rutland County Council, the document is the council's response to concern over the number of planning applications submitted to replace traditional windows with plastic alternatives. 

The authority has been taken to appeal after turning down applications for some window types, and the council hopes new guidance will make it easier for residents to understand which styles can be used on which properties. Rutland has more than 30 conservation areas, protected under planning legislation to preserve their character. 

The draft policy, which will be discussed by the cabinet on Tuesday next week (June 10) will prioritise repair over replacement if feasible, as repair is often more economical and retains the original design and materials. 

It will also favour traditional materials and techniques to align with conservation standards, avoiding modern alternatives that may conflict with the historic appearance of the area. 

The report goes on to say: "The traditional design and form of historic windows and doors make a substantial contribution to the architectural and historic integrity of traditional buildings within Rutland and contribute to the character and appearance of conservation areas. 

"They bear witness to past craftsmanship and architectural styles. Retaining, repairing, and where necessary, reinstating original designs is critical to maintaining the visual harmony and heritage of Rutland's conservation areas. 

"These features contribute significantly to the broader streetscape and represent an irreplaceable resource. Careful preservation or reinstatement of such elements ensures their continued benefit for both present and future generations." 

The policy has sections on window types, such as sash and dormer, and also categories of glass. 

There is also guidance on doors in historic conservation areas. 

The new policy says that a change of paint colour on doors is unlikely to be supported, and a change of door furniture would require listed building consent. It says a historic door should be kept because it is probably custom made and better quality than a modern door. 

The cabinet members will be asked to approve the draft policy to go out to a six-week consultation before adoption.