A 12-month self-build programme is achievable on a straightforward plot with good design and contractor selection. This is a realistic schedule with the activities that typically slip.
The 12-month plan
Month 1: Setup
- Site clearance
- Welfare and security setup
- Setting out
- Utilities application (long lead times)
Months 2–3: Substructure
- Foundation excavation and pour
- DPC and below-ground services
- Ground floor structure
Months 4–5: Shell
- External walls to first floor
- First floor structure
- External walls to wall plate
Month 6: Roof
- Roof structure
- Roof covering
- Watertight envelope
Months 7–8: First fix
- External joinery (windows and doors)
- First fix plumbing and electrical
- Insulation
Months 9–10: Second fix
- Plastering
- Second fix plumbing and electrical
- Kitchen and bathroom installation
Month 11: Finishes
- Decoration
- Flooring
- External works
Month 12: Completion
- Commissioning
- Snagging
- Local Authority Building Control sign-off
- Move in
What slips
- Utilities (electricity connection routinely 12–20 weeks)
- Drainage adoption
- Foundations on poor ground
- Material lead times (kitchens, windows, glazing)
- Discretionary client decisions
Realistic programme
Honest assessment: most self-builds take 14–18 months from groundbreaking. Plan for 12, expect 16.
Critical path
Watch:
- Local Authority Building Control inspections (don't miss)
- Foundation type confirmation early
- Roof watertightness before winter
- Long-lead items (windows, kitchen)
MCFAR supports self-builders with structural design and inspection.
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Request a QuoteFrequently Asked Questions
Can a self-build come in under 12 months?
Yes on simple plots with experienced contractor. Most don't.
When should I start design?
12–18 months before groundbreaking. Planning consent alone routinely takes 6+ months.