Office site management: turnkey design and build

We take your project from the validated brief and carry it through to effective occupation of the premises, under a single design and build contract. In concrete terms, you deal with one point of contact, not with 8 to 12 trades. Our assignment covers four dated deliverables: matrix of the 4 critical interfaces validated within 1 week of scoping, execution drawings and micro-milestoned schedule within 3 to 5 weeks, managed execution in 8 to 12 weeks with quantified weekly reporting, handover and snagging closure within 15 calendar days. Each milestone is contractual, not indicative. Across 180 office construction projects delivered between 2022 and 2024, 92% were handed over within the signed timelines to within 5 working days. We handle occupied sites, multi-site consolidations and executive floors alike, from 300 to 2,000 m². Beyond that, we switch to a breakdown into monthly phases with weekly sub-milestones.

We identify 5 to 7 critical paths from the outset, with a systematic alternative on each link (backup supplier, fallback technical solution). Each package is then broken down into 3 to 4 day micro-milestones, which triggers an alert from the 3rd day of delay, before the drift contaminates the critical path. Four interfaces are treated as a priority: electrical/partitions (reservations, socket heights compliant with NF C 15-100), paint/technical flooring (drying times of 24 to 72 h, FIPEC data sheets), furniture/cabling (trunking alignment, signature furniture lead time of 8 to 14 weeks), signage/finishes. Each interface receives a named protocol: who delivers what, in what order, with which contractual hold point. The design and build approach significantly reduces interface uncertainties compared with an organisation in separate packages, by unifying contractual responsibility and physical coordination. Managing in separate packages in line with MOP practice (articles L. 2411-1 et seq. of the public procurement code) segments contractual responsibility, never the physical co-activity.

Site management is a cash-flow line for your CFO and your Asset Manager, not a technical matter reserved for the works director. On a 500 to 800 m² office floor plate in the Paris CBD, the headline rent ranges between 600 and 900 EUR/m²/year (prime office market benchmarks for Île-de-France, 2024). Each week of drift on a relocation means a week of double rent: 6,000 to 14,000 EUR on 500 m², 9,000 to 22,000 EUR on 800 m². Under the tertiary decree (decree no. 2019-771 of 23 July 2019), a delay in delivering a project with an energy component also pushes back the recognition of savings in your annual declarations. Our indicators are structured for this reading: physical progress as a percentage, budget consumption line by line, alert from the 3rd day of drift. The weekly dashboard can be read in 5 minutes by an Asset Manager, with no prior technical translation needed.

1. Map the 4 critical interfaces
   From the scoping stage, we identify by name the electrical/partitions, paint/flooring, furniture/cabling and signage/finishes handovers. Each interface receives a written protocol: who delivers what, in what order, with which contractual hold point.
2. Break down into 3 to 4 day micro-milestones
   Each package is segmented into short milestones, which allows detection within 72 h. We identify 5 to 7 critical paths with a systematic alternative on each link. Everything is measured by the week, never by the month.
3. Synchronise 15 to 20 contractual points
   On an 8 to 12 week project, we hold 15 to 20 formalised synchronisation points, including a weekly 30-minute steering committee. The dashboard can be read in 5 minutes by an Asset Manager.
4. Hand over with snagging closure within 15 days
   Handover is a dated contractual deliverable. We commit to closing snags within 15 calendar days, with a detailed report interface by interface, and a complete as-built file ready for immediate use.