HDB flats carry the heaviest compliance load. The contractor must hold a live registration under the Registered Renovation Contractors' Scheme, obtain the HDB renovation permit before starting any work that requires one, and respect the permitted hours for noisy works. The template's HDB variant writes each duty into the contract, alongside a field for the registration number itself. Never let hacking begin before the permit is actually issued; a contractor who starts early exposes you to HDB enforcement. Owners who renovate to let out part of the flat usually follow the project with a room rental agreement built for HDB and condominium landlords.
Condominiums shift the centre of gravity to the management corporation. Approval must be obtained before works begin where the by-laws require it, and the contractor has to comply with the by-laws and house rules: lift protection, hoisting windows, working hours, protection of common property. Most MCSTs also require a renovation deposit, and the agreement obliges the contractor to cooperate with that arrangement.
Landed properties raise the structural stakes. Where works touch structural elements, the contract requires the plans, approvals and permits under the Building Control Act 1989 to be in place before those works start, including a qualified person where the law demands one and any planning permission required from the URA.