Had a quote for a few jobs - garden paving, kitchen wall tiling, loft boarding and ladder

Heyyouguys

Hello

Had someone come round to quote a few outstanding jobs and the cost doesn't seem right. Location is NW London, so I'm aware of the London premium
All costs include materials. Please let me know your thoughts on what you would expect to pay for these:

- Pave garden for area of 45 sqm  (currently lawn so remove grass, lay foundation and all layers etc, and pave with standard concrete paving (lets say £20/sqm) = £5500
- Move existing internal manhole 4 metres outside extension (digging, breaking concrete patio and refilling, piping etc) = £3500
- Board loft 2.5m each direction around the hatch (25 sqm) on top of existing insulation, and add a ladder (no changes to the hatch) = £1550
- Remove splashback tiles in kitchen (roughly 6 sqm) across all walls, make good the wall and then retile (cost includes materials, tiles roughly £80) = £450
- Add backing and shelves (using MDF/plywood) to an existing airing-type cupboard (size roughly 2m high x 0.75m) wide = £150 

Thanks in advance!