Asked whether a householder can use their own contractor for a vehicle crossing, Swansea Council answers: "No - The City and County of Swansea, as the highway authority, has a responsibility to manage all work on the local highway network", and adds that "the practicalities of meeting these requirements mean that only the City and County of Swansea's own contractor may carry out these works". The same page sets the order of the job: "All new and extended driveways MUST be completed before we can construct the crossover."
The council names 31 conservation areas, designated under section 158/159 of the Historic Environment (Wales) Act 2023, and names nine that carry an article 4 direction: Maritime Quarter, Penclawdd, Mumbles, Rhossili, Horton, Port Eynon, Llangennith, Reynoldston and Holt's Field.
Swansea is a Welsh unitary, so the front garden rule is the Welsh Government's rather than the English Planning Portal's. The Welsh Government states that "if you are intending to lay or replace a hard surface to the front of your house you must use permeable or porous materials", that run off from an impermeable surface "must be directed to a permeable or porous surface to the front of your home", and that "you can replace or repair a small area of up to 5 square metres of existing hardsurfacing without using permeable or porous materials".
The council also states that "planning permission is not usually required if the access is onto an unclassified road, but might still be needed if the access forms part of more extensive works to the property, or the property is a conservation area", and that an access onto a classified A, B or C road does need planning permission.
We would explain how you check the conservation boundary, any article 4 direction, the crossover sequence and the proposed work before confirming whether permission is needed.