The short answer
A contractor builds on its own commercial terms; it does not represent you against itself. An owner-side project manager prequalifies and tenders the contractor, supervises quality, controls programme and cost, and puts every variation to you for approval.
A contractor builds; it does not represent you
The contractor prices the works, mobilises the site, employs the trades and delivers what the contract describes. It is also a commercial party with its own margin, programme and risk to protect. That is not a flaw; it is the role.
What the contractor does not do is prequalify itself, test its own prices against the market, inspect its own work independently or decide whether a change it proposes serves you. The gap is widest at two moments: before the contract is signed, and when a change is proposed mid-build.
What a project manager does
- Prequalifies and manages the contractor, from shortlist to performance on site.
- Supervises quality to the standard written into the drawings and specification.
- Controls programme and cost against what was agreed.
- Administers variations, with you approving each one before work proceeds.
- Protects design intent, so what was designed is what gets built.
Prequalification and tender: where the value is
Prequalification tests capability, relevant experience, current capacity, financial standing and fit with the villa before anyone is invited to price. A poor choice at this stage cannot be supervised or negotiated away later.
The tender then turns the drawings and specification into offers that can be compared, which only works if every bidder receives the same information. Read inclusions, exclusions, provisional sums and assumptions together before comparing headline prices. Our guide to design-only vs design-and-fit-out contracts covers how the contract structure changes who carries the risk.
Quality, programme and cost on site
Quality is a routine, not a single inspection at handover. Work is checked against the approved drawings while correction is still easy, especially before finishes conceal what sits behind them. Defects are recorded, raised and tracked until resolved.
Drift rarely arrives as one event. A late decision, a substituted material, a reordered sequence: each looks minor, and together they move completion and cost. Regular, plain reporting surfaces them while there is still room to respond.
Variations: formal, priced and approved by you
Every change follows the same steps: describe it, price it, check the price, then bring it to you for approval before work proceeds. The administration sits with the project manager; the decision stays with you. Every approved change is written down, which gives you a clear record at handover.
Design intent on site
A simplified junction, a substituted finish, a service routed where the drawing showed none: each looks reasonable alone, and together they change what the villa is. Whoever supervises the site needs to understand what the design was trying to achieve, not only whether the work matches a line on a drawing.
At Ganggaan, project management and site supervision sit in the same studio as the design and the Architect of Record permitting, so the people who drew the villa are the people checking it is built. Ganggaan is not the building contractor: it prequalifies, tenders and supervises the contractor on the owner's behalf. We also supervise builds designed by other firms.
Appoint the project manager first
The value sits in decisions made before the contract exists: who may bid, what the documents require, what the price covers and how changes are handled. A project manager appointed afterwards inherits those decisions rather than making them.
- Engage the owner-side project manager.
- Prequalify and tender with them.
- Appoint the contractor they helped you choose.
Before any of that, confirm which authority covers your plot. Our guide to DM, DDA or Trakhees shows how.