Programme template

Wraparound extension: typically 16–20 weeks.

Combined side-return and rear extension with open-plan kitchen/dining, structural steels and large glazing.

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

Site set-up & demolition4–6 days
◆ BC: commencement noticeinspection / milestone
Excavation & footings7–10 days
◆ BC: excavation inspectioninspection / milestone
Foundations, drainage & slab7–10 days
◆ BC: DPC & drains inspectioninspection / milestone
Masonry & structural steelsWraparounds carry heavy steelwork — fabrication lead 4–6 weeks12–16 days
Roof structure & covering6–10 days
Watertight: glazing & doorsLarge sliders/bifolds: 6–10 week lead times4–6 days
First fix & underfloor heating7–10 days
Plastering & screed dryingScreed cure 1mm/day — flooring can't start early10–15 days
Second fix & kitchen install10–14 days
Decoration & flooring6–9 days
Snagging & clean3–5 days
◆ BC: completion inspectioninspection / milestone

Customise this programme:

Residential

Commercial

Packages

Start date

Typical durations for a well-run job — actual programmes vary with site, weather and lead times.

Adjust stage durations

Site set-up & demolition4d (4–6)Excavation & footings7d (7–10)Foundations, drainage & slab7d (7–10)Masonry & structural steels12d (12–16)Roof structure & covering6d (6–10)Watertight: glazing & doors4d (4–6)First fix & underfloor heating7d (7–10)Plastering & screed drying10d (10–15)Second fix & kitchen install10d (10–14)Decoration & flooring6d (6–9)Snagging & clean3d (3–5)

Completed In Progress Upcoming

27 Jul15 Aug3 Sept22 Sept11 Oct

Site set-up & demolition

BC: commencement notice

Excavation & footings

BC: excavation inspection

Foundations, drainage & slab

BC: DPC & drains inspection

Masonry & structural steels

Roof structure & covering

Watertight: glazing & doors

First fix & underfloor heating

Plastering & screed drying

Second fix & kitchen install

Decoration & flooring

Snagging & clean

BC: completion inspection

Turn this into a live tracked project — weekly updates, photos and RAG status your client can follow. Track this build live — free

Single-storey rear extension →Double-storey extension →Loft conversion (dormer) →Full house refurbishment →New-build house (single plot) →Small residential development (2–6 plots) →