How to Keep a Digital Site Diary for UK Construction Projects

A site diary is one of those things every builder knows they should keep but most only think about when something goes wrong. A dispute with a client, a building control query, or an insurance claim. Suddenly that daily record you never quite got round to would have solved everything. This guide covers what a site diary is, why it matters under UK regulations, what you should record, and how going digital saves you time and hassle.

What Is a Site Diary?

A site diary is a daily record of everything that happens on a construction project. Think of it as your project's black box. It captures who was on site, what work was done, what the weather was like, any deliveries, any problems, and any instructions given or received.

On large commercial projects, keeping a site diary is standard practice. The site manager fills one in every day without question. But on smaller residential jobs, extensions, renovations, and new builds, it often gets overlooked. That is a mistake.

The value of a site diary only becomes clear when you need it. A client disputes how long a phase took. A subcontractor claims they were given different instructions. Building control asks when a particular inspection happened. Without a diary, you are relying on memory. With one, you have facts and dates.

Legal and Contractual Requirements

There is no single UK law that says "you must keep a site diary." But several regulations create record-keeping obligations that a site diary is the simplest way to meet.

CDM Regulations 2015

The Construction (Design and Management) Regulations 2015 require the principal contractor to plan, manage, and monitor the construction phase. This includes maintaining records of inspections, welfare arrangements, and site inductions. A daily diary is the most practical way to evidence all of this.

Building Regulations

Building control officers expect to see evidence of compliance at each stage. When was the foundation inspection done? When were the drains tested? A site diary with dated entries and photos provides that trail without having to dig through emails and texts.

Contractual Records

If you work under JCT, NEC, or any formal contract, there are specific provisions around notices, variations, and delays. A contemporaneous site diary - meaning one written at the time, not reconstructed later - is powerful evidence in any contractual dispute. Adjudicators and courts give far more weight to records made on the day than to witness statements written months after the event.

Health and Safety Records

The Health and Safety at Work Act 1974 and the Management of Health and Safety at Work Regulations 1999 require employers to record significant findings from risk assessments. Recording daily safety checks, toolbox talks, and any incidents in your diary creates a continuous compliance record.

What to Record Every Day

The best site diaries are consistent. Record the same categories every day so nothing slips through. Here is what to include:

The Basics

• Date and day of week
• Weather conditions - temperature, rain, wind, frost. Weather affects concrete pours, roofing work, painting, and excavation. If bad weather causes a delay, you need the diary entry to prove it
• Start and finish times - including any stoppages

People on Site

• Names and trades of everyone working that day
• Subcontractor details and number of operatives
• Visitors, including building control, architect, client, and any HSE inspectors
• Anyone who left site early and the reason

Work Completed

• What was done, where on site, and by whom
• Any work that could not be completed and why
• Progress against the programme

Deliveries and Materials

• What was delivered, quantity, supplier, and delivery note number
• Any damaged or rejected deliveries
• Materials tested or samples taken

Instructions and Variations

• Any verbal or written instructions from the client, architect, or engineer
• Changes to the original scope
• Requests for information (RFIs) raised or answered

Inspections and Safety

• Building control visits and outcomes
• Safety inspections and any findings
• Accidents, incidents, or near misses
• Toolbox talks delivered and topics covered

Photos

• Progress photos from consistent angles
• Anything that will be covered up (foundations, reinforcement, hidden services, damp proofing)
• Any defects or damage
• Delivery condition of materials

The golden rule: if it is not in the diary, it did not happen. Five minutes at the end of each day is all it takes.

Paper vs Digital Site Diaries

Paper site diaries have been the industry standard for decades. You can buy pre-printed diary books from any builders merchant. They work, but they have real limitations.

Problems with Paper

• They get lost or damaged. Rain, coffee, vans, site offices that get broken into. Paper is fragile in a construction environment
• Handwriting is often illegible. Especially when you are filling it in at the end of a long day in cold weather
• Photos are separate. You take photos on your phone but they are not linked to the diary entry. Good luck finding the right photo six months later
• No backup. If the diary is lost, it is gone forever
• Hard to search. Need to find when a specific delivery arrived? You are flicking through pages
• Sharing is difficult. If your quantity surveyor or solicitor needs copies, you are photocopying by hand

Advantages of Digital

• Timestamped entries. A digital diary automatically records when each entry was made. This is important for evidential purposes because it proves the record was contemporaneous
• Photos attached to entries. Take a photo and it links directly to that day's record with GPS and time metadata
• Searchable. Find any entry, any name, any date in seconds
• Cloud backup. Your data is safe even if your phone ends up in a skip
• Easy to share. Export or share records with your team, client, or solicitor instantly
• Works offline. Good construction apps let you log entries without signal and sync later

How to Start a Digital Site Diary

Switching from paper to digital does not need to be complicated. Here is a practical approach.

Step 1: Choose Your Tool

You need something you will actually use every day. If it is clunky or takes too long, you will stop using it within a week. FORGE Command is built specifically for UK tradespeople managing construction projects. You can log daily progress, attach photos, track multiple jobs, and pull up records whenever you need them. One payment of £39.99, no monthly fees eating into your margins.

Step 2: Set a Daily Routine

Pick a consistent time. The end of the working day works best for most people. Spend five minutes logging what happened. If you leave it until the next morning, you will forget details. If you leave it until the end of the week, it is basically fiction.

Step 3: Be Factual, Not Emotional

A site diary is a factual record, not an opinion piece. Write "Bricklayer arrived 90 minutes late, delaying start of rear extension wall" rather than "Useless bricklayer turned up late again." The first is useful evidence. The second is not.

Step 4: Take Photos Every Day

Photos are the most powerful part of a digital diary. Take them from the same angles each day to show progress. Always photograph anything that will be covered up. A photo of reinforcement before a concrete pour is worth its weight in gold if questions arise later.

Step 5: Record Variations Immediately

When a client asks for something different from the original scope, record it in the diary straight away. Note the date, what was requested, who asked for it, and any cost or time implications you flagged. This single habit prevents more payment disputes than anything else.

Common Mistakes to Avoid

Writing It Up Days Later

A diary entry written three days after the event is not a contemporaneous record. Courts and adjudicators know the difference. If you need your diary as evidence, entries made on the day will be taken seriously. Entries made weeks later will be treated with scepticism.

Only Recording Problems

Some people only write in their diary when something goes wrong. The problem with this approach is that your diary only shows bad days. When you need to demonstrate that the project was generally running well, you have nothing to show. Record the good days too.

Not Including Enough Detail

"Continued brickwork" tells you almost nothing. "Completed outer leaf brickwork to first floor level on north elevation, 3 courses above DPC" tells you exactly where the project was at that date. Be specific.

Forgetting Verbal Instructions

Clients and architects give verbal instructions all the time. "While you are at it, can you move that doorway 200mm to the left?" If you do not record it, there is no proof it was requested. Log every instruction, no matter how small, and note whether it constitutes a variation to the contract.

Not Backing Up

If your only copy of the diary is on one device with no backup, you are one broken phone away from losing everything. Use a tool that syncs to the cloud automatically.

How FORGE Command Helps

FORGE Command is a construction project management app designed for UK tradespeople who are running jobs, not sitting in offices. The daily logging feature lets you record progress, attach photos, and track what happened on each job, all from your phone.

Because everything is stored digitally with timestamps, you have a proper audit trail. If a client queries when work was done, or building control wants to check inspection dates, you can pull it up in seconds. No rifling through paper notebooks or scrolling back through months of WhatsApp messages.

It also handles the other parts of project management: scheduling, budgets, and progress tracking. So your site diary sits alongside all the other information about each project, instead of being a disconnected notebook in the glovebox.

Frequently Asked Questions

Is a site diary a legal requirement in UK construction?

There is no single law that says you must keep a site diary. However, the CDM Regulations 2015 require records of inspections, welfare checks, and safety arrangements. Building regulations demand evidence of compliance at each stage. In practice, a site diary is the easiest way to satisfy these requirements and protect yourself in any dispute.

What should I write in a construction site diary every day?

At minimum, record the date, weather conditions, who was on site, what work was carried out, any deliveries received, any instructions or variations issued, inspections completed, and any incidents or near misses. The more detail you capture, the stronger your position if questions arise later.

Can a digital site diary be used as evidence in a dispute?

Yes. Digital records with timestamps, GPS data, and photo attachments are increasingly accepted as evidence in adjudication, arbitration, and court proceedings. In many cases they carry more weight than handwritten notes because they are harder to alter after the fact and include automatic metadata.

How long should I keep construction site diary records?

Keep site diary records for at least 6 years after project completion, which covers the limitation period for most contractual claims. For projects involving work on dwellings, consider keeping records for 15 years to cover the Defective Premises Act limitation period. Digital storage makes long-term retention easy and cost-free.

Final Thoughts

A site diary is not glamorous. Nobody gets excited about filling in a daily log. But it is one of the most valuable habits you can develop as a builder or contractor. Five minutes a day gives you a complete, searchable, timestamped record of every project you work on.

When a client disputes a variation, when building control queries a timeline, when an insurer asks for evidence, you will be glad you kept it. And when your diary is digital with automatic backups and photo attachments, you have a record that is practically bulletproof.

Start today. Not tomorrow. Today.