Alteration to the roof to include rear dormer to main roof and outrigger and 1no velux window to front elevation.

Fenestration alterations to the rear elevation, incorporating an enlarged opening and the installation of French doors to the lower ground floor flat (No. 5A York Grove), and enlarged openings and the installation of a Juliet balcony and French doors to the maisonette flat (No. 5 York Grove). Incorporates the replacement of an external staircase and associated works.

Alterations to the roof incorporating hip to gable roof extension with rear dormer, conversion of garage into habitable space, installation of a bay window to the front elevation, alteration to the fenestration and associated works.

Erection of additional storey to create second floor incorporating 2no rear rooflights, revised fenestration, facade alterations and associated works.

Part-retrospective application for the remodelling of the existing dwellinghouse comprising the erection of single-storey rear extension and first floor front extension; alterations to fenestration; and roof alterations including raising of ridge height, creation of front gable ends and side-facing Sussex hips, installation of 1no front and 2no rear dormer windows, and 2no rear rooflights; with associated alterations, as approved under permission BH2021/04282, without adherence to conditions 1 or 5 of said application, to permit amendments to the design of the rear extension, front porch and fenestration, and confirm tree protection measures.

Conversion of 21 and 21A Osborne Villas into a single residential dwelling (as confirmed under CoL BH2023/02379) and the creation of a side lean-to store with a new rear window and enlarged rear door with internal alterations and associated works.

Roof alterations to include hip to gable roof extension, front rooflights and rear dormer. Erection of single storey rear extension with rooflights and first floor rear extension, revised fenestration and associated works.

Loft alterations and extensions including rear infill between two existing pitched roof gable ends, new dormer at second floor front and matching window replacement at first floor front.

Construction of car hard standing at the front of property with creation of vehicle crossover and associated alterations (part retrospective).

External alterations including restoration of a gothic folly wall, rebuild of rear conservatory, including a replacement roof structure with 2no. rooflights and restoration of the side chapel/living space (north elevation) roof structure to period roof slates and installation of 2no. rooflghts.