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Rear extension, Chorlton

A single-storey rear extension and kitchen remodel on a 1930s semi. Six stages, fourteen weeks, one directly employed crew. Here is the whole job as the client saw it.

Duration
14 weeks
Stages
6
Quoted
£40,000
Final
£41,450
Crew
7 Silo staff
Hero — finished extension from the garden

The brief

Sarah and Tom had a dark galley kitchen and a garden nobody used. They wanted one open room across the back of the house, two sets of doors, and a budget they could actually hold to. They had been quoted by three builders and had no way to compare what was included.

What Silo did

We broke the job into six priced stages before anyone started. The full £40,000 was funded into Silo Technology on day one and released stage by stage on sign-off. One Silo crew ran the whole thing, with the daily record posted into the app.

Stage by stage.

Stage 01

Weeks 1–3

Signed off

Groundworks & footings

Existing patio lifted, footings dug to building control depth, drainage rerouted around the new corner. Inspector signed on the Thursday.

  • 18 site photos
  • 1 inspection certificate

£8,400

released 21 Mar

Stage 02

Weeks 3–6

Signed off

Shell & steel

Blockwork to wall plate and the steel in over the old back wall. Rain put two days on the programme, flagged in the app the morning it happened.

  • 31 site photos
  • +2 days, no cost change

£12,100

released 11 Apr

Stage 03

Weeks 6–8

Signed off

Roof, lantern & watertight

Warm roof built up, lantern set, doors in and the building closed. This is the stage clients feel — the room exists.

  • 24 site photos
  • 2 warranties filed

£7,900

released 25 Apr

Stage 04

Weeks 8–10

Variation agreed

First fix M&E

Electrics, plumbing and underfloor heating. Sarah added four sockets and moved the island feed — priced in the app at £1,450 and approved before the change was made.

  • 1 variation
  • Approved in 40 minutes

£9,600 + £1,450

released 9 May

Stage 05

Weeks 10–12

Signed off

Plaster & screed

Boarded, skimmed and screeded over the underfloor heating, then left to dry on a schedule the app kept everyone honest about.

  • 12 site photos

£6,200

released 23 May

Stage 06

Weeks 12–14

Handover

Second fix, decoration & handover

Kitchen fitted, floor laid, decorated and snagged. Eleven snags raised in the app, all closed within nine days. Final payment released on the client's sign-off.

  • 11 snags, all closed
  • Full document pack issued

£3,700

released 6 Jun

The money, in full

£40,000

Quoted and funded on day one

£1,450

One variation, priced and approved in advance

£41,450

Final cost. No other changes, no surprises.

0

Days the crew waited to be paid

Portrait — the Chorlton crew

The crew

Same seven people, start to finish.

Every one of them is employed by Silo. The client met the site lead before the first spade went in and had his number for fourteen weeks.

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