Plastering walls and ceiling, painting of bedroom, landing and stairway and lounge ceiling following fire damage

1930s terrace house - we would would like to knock through from the dining room into kitchen, and add a small extension to rear of kitchen to square of existing pantry which isn't full width of kitchen / get mould problems in winter (could be as small as 1.20m x 1.10m if existing walls can be reused). Thank you

70mm MF stud walls and ceramic floor tiling.

Build an extension on existing porch as we want to add a toilet inside the porch. Current porch size. 3ft x 9ft Want to increase the porch size to - 6ft x 10.5 ft with a toilet included.