No, not if the repairs are of a minor nature, e.g. replacing the felt to a flat roof, repointing brickwork, replacing floorboards. Although the height of boundary walls may be restricted under the Town and Country Planning Act. Please consult the Planning Service for further advice.
If the repair work is major in nature, like removing a substantial part of a wall and rebuilding it, or underpinning a building and in the case of re-tiling, the tiles are the same type, then no approval is needed. If the new tiling or roofing material is substantially heavier or lighter than the existing material, or if the roof is to be thatched where previously it was not, then an approval under Building Regulations is probably required. Similarly if you propose to re-roof (take away the old roof structure and replace it) then consent will be required.