The single source of truth for every construction project
Stop running builds on WhatsApp, spreadsheets and memory. BuildOS records every decision, cost, approval, photograph and drawing revision — so disputes disappear and clients stay confident.
- Faster approvals
- 4x
- Admin hours saved weekly
- 6h
- Disputed variations
- 0
Faster approvals
Admin hours saved weekly
Disputed variations
Brookfield Rear Extension · Build Timeline™
VO-004 raised — bi-fold upgrade
30 Jul · £3,150 · +2 days
Site diary submitted
29 Jul · 12 photos · 6 on site
Steelwork inspection passed
28 Jul · Certificate filed
VO-003 approved by client
24 Jul · +£2,400 · +1 day
Invoice INV-0007 paid
21 Jul · £28,500
71
Watch
Project Health Score™
2 milestones forecast late · 1 client decision overdue
Programme · critical path
Strip out
Groundworks
Foundations
Groundworks
Steel & frame
Structural
Roof & glazing
Envelope
Second fix
Internal
Scope & drawings
Every revision version-controlled
Live build
Programme tracked against reality
Site evidence
Timestamped photos from the phone
Handover
A permanent digital property record
Six pillars, one record
Planning, commercial, evidence, communication, compliance and handover — each module writes to the same permanent project ledger.
Nothing changes without approval
ChangeLock captures every variation with cost, programme impact, evidence and a digital sign-off.
One programme everyone trusts
Phases, tasks, dependencies and milestones, with trades seeing only the work assigned to them.
Commercial control as you build
Budget, committed cost, actuals, forecast and margin move in real time as site data arrives.
Evidence by default
Photos, diaries, deliveries and inspections are timestamped and attached to the record they prove.
Clients stop chasing
A plain-English portal answers what is done, what is next, what needs deciding and where money went.
Permanently auditable
An append-only activity ledger records every edit, approval and export for the life of the project.
How a project runs on BuildOS
- 01
Set the project up once
Client, scope, programme and budget from a template — or drafted for you and reviewed before publishing.
- 02
Run the site from your phone
Diaries, photos, tasks, issues and snags captured in under a minute, on site, as it happens.
- 03
Change is priced and approved
Raise a variation, show the impact, send it, get a signature. No more disputed conversations.
- 04
Hand over a digital record
Certificates, warranties, manuals and final drawings packaged as a permanent property record.
Three signature systems
The parts of BuildOS no spreadsheet can replicate. Each has its own deep-dive with a working demo.
Build Timeline™
A chronological replay of the project linking every task, photo, approval, inspection and cost.
ExploreChangeLock™
Variation management with evidence, commercial impact, programme impact and digital approval.
ExploreProject Health Score™
A live score across programme, budget, quality, compliance, approvals, issues and payments.
Explore
Proof
£14,200 recovered on a single rear extension
Seven variations raised, priced and approved with an average client turnaround of four hours. Zero disputed items at handover, and 6.5 admin hours returned every week.
Read the case study
“Seven variations, all priced and approved inside a day each. We recovered £14,200 that would previously have been swallowed.”
Daniel Whitfield
Director, Whitfield Construction
“My lads open the app, see today's tasks and the current drawing revision. The wrong-drawing phone calls have stopped completely.”
Marek Nowak
Site manager, 14-strong crew
“As the homeowner I could see progress photos every evening and approve changes from my phone. I never had to chase once.”
Sarah Brookfield
Client, rear extension
Take the interactive walkthrough
Step through the three signature features with real project data. No signup, no sales call.
Watch a week of site activity become a permanent, evidence-linked record.
Step 1 of 4
Build Timeline™ · Capture on site
The site captures evidence, not paperwork
A trade opens the app, photographs the work and submits the diary in under a minute. Photos are timestamped and geo-stamped at the moment of capture, so nobody has to remember what happened.
Site diary · 29 Jul · Brookfield
Submitted
Steel padstones
Deck poured
Scaffold check
- On site
- 6 operatives
- Weather
- Dry · 19°C
- Captured
- 12 photos
Work out your own numbers
Most SME contractors lose 2–5% of contract value to unrecovered change and rework. Here is what tightening that up is worth to you.
What is leakage costing you?
Move the sliders to match your business. Figures are illustrative, based on typical SME contractor benchmarks.
Estimated annual upside
£45,498
- Portfolio under management
- £1,440,000
- Variation value recovered
- £25,920
- Admin hours returned
- 515 hrs
- Value of time saved
- £19,578
Questions, answered
Anything else? Talk to us.
Every project deserves a permanent record
Open the demo workspace and walk a live project end to end — dashboard, timeline, variations and health score.