Rear extension construction phase plan example
Two finished plans, written for real-sized jobs. Read one, download it in Word or PDF, then write yours on the same blank.
Get this blankChoose a job
- Two-storey rear extension on a lived-in semiA homeowner stays in the house while a builder, a roofer, a scaffolder and an electrician add two storeys at the back.1 page, checked 2 November 2026
- Strip-out and fit-out of a vacant single-storey retail unitFour contractors strip an empty shop back to the landlord’s shell and fit it out. Notified to HSE.5 pages, checked 2 November 2026
Two-storey rear extension on a lived-in semi
A homeowner stays in the house while a builder, a roofer, a scaffolder and an electrician add two storeys at the back.
What to change
- Your company, the client and the address
- What the client has told you, in their words
- Who else is on site, with their real numbers
- Where your toilets, washing and rest are
- Every row of the dangers table, for your job
- The date: before you set up the site
Sources
- HSE: Construction phase plan (CDM 2015), what you need to know as a busy builder (CIS80)
- HSE: Managing health and safety in construction (L153), Appendices 3 and 6
- HSE: Need building work done? (INDG411)
- HSE: Provision of welfare facilities during construction work (CIS59)
- Construction (Design and Management) Regulations 2015: regulations 4, 7 and 12
Checked
The same sheet as text
Worked example of a made-up job. Not a plan for a real site.
Extension construction phase plan
The job
- Your name and companyHollins & Reed Contracting Ltd, Dan Hollins
- Client name and addressHelen Tunstead, 9 Fernlea Rise, Stockport
- Architect or principal designerMarsden Lyle Architects Ltd, principal designer
- What is the job?Two-storey rear extension to a lived-in semi
- Start, finish and other key dates8 June to 11 September 2026. Roof on by 24 July
- Principal contractor, if more than one contractorHollins & Reed Contracting Ltd
What the client has told you
- Stopcock under sink; gas meter, fuse box in porch. Side path access. Principal designer’s written appointment seen, 12 May 2026. Refurbishment asbestos survey, Hazel Bank Surveys Ltd, 19 May 2026: none in the kitchen, rear wall or eaves.
Toilets, washing and rest
- Unit on drive from day 1: toilet, basin, hot water, soap, towels, drinking water, heated room, table, seats, kettle, microwave.
Who else is on site
- Priya Shah; Joe Penketh, labourer. Roofer from 13 July: Cheadle Heath Roofing Ltd, Neil Hazlehurst, 0161 496 0167. Scaffolder: Hollins & Reed Scaffolding Ltd, 0161 496 0173. Electrician: Hollins & Reed Electrical Ltd, 0161 496 0174.
Keeping everyone up to date
- Five-minute talk at 08:00 each day, with changes on the site board. Helen Tunstead hears the same day.
Site rules
- Boots and hi-vis at all times, hard hat under the scaffold. Park on the road, never across a drive. No radios. No phones on the scaffold. No smoking on site or in the house. Ask Dan before going into a trench. No hot works.
The main dangers on site
- Falls from heightYes. Guardrailed scaffold: inspected first, weekly, after gales
- Collapse of excavationsYes. Trenches supported and barriered, checked each shift
- Collapse of structuresYes. Props to the engineer’s drawing, set by a competent person
- Exposure to building dustsYes. Wet cutting, extraction on tools, masks, no dry sweeping
- Exposure to asbestosNo. None in the survey. Stop and ring Dan if anything looks odd
- Activities or workers requiring supervisionYes. Joe Penketh is new to us and stays with Priya Shah
- ElectricityYes. Supply off before drilling walls; buried services traced
- Risks to members of the public, the client and othersYes. Site fenced off from the garden; scaffold netted; chute to skip
- Other dangers on siteYes. Deliveries watched on the drive by a second person
Running the job safely
- Person responsible for the job running safelyDan Hollins, 0161 496 0142
- How supervision will be providedDan Hollins daily, Priya Shah if he is away
- Plan drawn up by, and dateDan Hollins, 1 June 2026
What a finished plan looks like
This plan is one page long. The retail unit fit-out plan is five pages: the plan grows with the job.
- The job
- Who is who, in one line each. The architect is the principal designer, appointed in writing, and the builder the principal contractor. With no written agreement, the client’s duties fall to the builder as principal contractor too.
- The form only needs the names and the date of the appointment.
- What the client has told you
- Where the services turn off, how to get in, and what the asbestos survey found.
- Two lines is enough, as long as each one changes what the builder does.
- Toilets, washing and rest
- A hired unit on the drive.
- On a 14-week job the builder should not count on the family’s bathroom.
- Who else is on site
- The team, the roofer, the scaffolder and the electrician, with a number for each firm.
- Every firm on site should be here, which is why a job with one roofer has four names.
- Keeping everyone up to date
- A talk at 08:00 and the site board.
- One line. A daily update is what HSE asks a small job to think about.
- Site rules
- Rules for this house, such as parking and no phones on the scaffold.
- Only the rules someone on this job could break.
- The main dangers on site
- Yes or No for all nine, and the control in one line.
- A pointer, not a method. How the work is done belongs in the RAMS.
- Running the job safely
- One name, who covers him, and the date the plan was drawn up.
- The date has to fall before the site is set up.
What the plan leaves out
Risk assessments and method statements
HSE’s guidance (L153, Appendix 3) says the plan is not generic risk assessments or detailed method statements. Keep those as their own documents. The RAMS examples show what they look like.
The health and safety file
A separate record of the finished job, for whoever works on the building next. On a project with more than one contractor the principal designer prepares it, and it goes to the client at the end.
Pre-construction information
What the client provides about the site and the work before it starts. The plan is written from it and does not replace it.
Construction phase plan example questions
How long should a construction phase plan be?
Long enough to cover the job and no longer. HSE’s guidance asks for a plan that is relevant, sufficient and proportionate, and its busy builder leaflet says a simple plan is usually enough for small routine work.
Who signs the plan?
No source asks for a signature. The principal contractor draws the plan up, or the contractor where there is only one (CDM regulation 12), and the plan says who did and when. The client makes sure it is drawn up before the work starts. On a domestic job that duty falls to the contractor, or to the principal designer by written agreement.
Can I copy this plan for my job?
Not as it is. The job, the people and the arrangements here are made up. Start from the blank and change at least these:
- Your company, the client and the address
- What the client has told you, in their words
- Who else is on site, with their real numbers
- Where your toilets, washing and rest are
- Every row of the dangers table, for your job
- The date: before you set up the site
Is this the HSE example?
No. HSE’s leaflet CIS80 has a blank form, not a filled plan. These are worked examples of our own, and every job in them is made up.