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Commercial office fit-out (CAT B): typically 10–14 weeks.

CAT B fit-out of an open-plan office floor: partitions, finishes, services adaptations, furniture and handover.

Durations are typical ranges for a well-run job with normal lead times — actual programmes vary with site conditions, weather and procurement.

Stage-by-stage

  1. Site establishment & protectionLandlord approvals and licence to alter must be in place first2–3 days
  2. Strip-out of existing fit-out3–5 days
  3. Partitions & framing8–12 days
  4. M&E first fix adaptationsSprinkler/AC adaptations often need landlord's contractor8–12 days
  5. Ceilings & raised floor works5–8 days
  6. Joinery & feature elements6–10 days
  7. Decoration & wall finishes5–8 days
  8. Floor finishes4–6 days
  9. M&E second fix & commissioning5–8 days
  10. Life-safety testing & certificationFire alarm cause-and-effect, emergency lighting2–3 days
  11. Furniture install & IT3–5 days
  12. Snagging & sparkle clean2–4 days
  13. ◆ Practical completion & handoverinspection / milestone

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