The work order says “attend water leak”. It does not say whether you may diagnose the fault, isolate the supply, make the area safe or complete the repair. For plumber letting agent work, that vague instruction is the first control failure.
Build decision gates into the job. Name the people involved. Define the authorised outcome. Set a stop point. Get extra work approved before the plumber restarts.
Map the instruction before accepting plumber letting agent work
A managed property can involve a letting agent, landlord, tenant, accounts team, site contact and separate spending approver. One person may hold several roles. Do not assume that they do.
Record each role separately:
- Contracting entity: the exact legal or trading name of the party engaging your plumbing business.
- Agent capacity: whether the letting agent contracts in its own name or acts for a named landlord or other principal.
- Instructing contact: the person who sent the job request.
- Payer: the party that should receive and settle the invoice.
- Spending approver: the named person allowed to approve the work and any variation.
- Site contact: the person arranging access, keys or parking.
- Tenant: the person occupying the property and reporting the fault.
- Accounts contact: the person matching your invoice to the agent’s reference.
Use names and contact details. “Landlord” or “office” is not enough when the plumber needs an answer beside an open ceiling.
Send payment responsibility back to the client
Record where the fault is and what condition you found. State whether the affected pipe appears to serve the flat, another flat or a communal area. Do not decide whether the tenant, landlord, freeholder or another party should pay.
That decision belongs to the authorised client. Your record should give them plumbing facts: the exact pipe, fixture, service, location, condition and work completed.
If the agent wants you to investigate before deciding responsibility, write that as the authorised outcome. Do not turn an investigation instruction into an open-ended repair instruction.
Turn the message into a usable plumbing work order
Plumbing work orders need more than an address and a short fault description. Before dispatch, turn the message into a job brief that tells the plumber what may happen next.
A reference number identifies the instruction. It does not define the scope. Use a work order template with named authority and scope fields rather than trying to recover missing details from scattered emails.
Split the work into separate outcomes
Write inspection, diagnosis, make-safe work, permanent repair and reinstatement as separate stages.
Inspection lets the plumber view the reported area. Diagnosis identifies the affected service and likely fault. Make-safe work controls immediate leakage or damage. Permanent repair restores the agreed service. Reinstatement closes or repairs access damage when that work is included.
The agent may authorise some stages and not others. “Attend leak and report” does not authorise a permanent repair. “Make safe” does not automatically include opening a lined wall, replacing concealed pipework and reinstating the finish.
Define the outcome before you price or dispatch the job.
Use one managed property plumbing brief
Keep the instruction in one place. The office and plumber should read the same scope, limit, stop point and approver details.
Use this copy-ready blank brief:
Contracting entity: [exact legal or trading name] Agent capacity: [contracting in own name / acting for named landlord or principal] Instructing contact: [name and contact details] Payer: [name and billing details] Property: [address and postcode] Location in property: [flat, room, fixture or service] Work-order reference: [client reference] Reported fault: [plain description] Authorised outcome: [inspect / diagnose / make safe / repair / reinstate] Included work: [specific tasks] Excluded work: [concealed work, destructive access, reinstatement or other boundary] Approval limit: [authorised amount] VAT treatment of limit: [VAT included / VAT excluded] Attendance or diagnosis already committed: [amount] Remaining authorised amount: [amount available for the stated scope] Stop point: [condition that requires further approval] Spending approver: [name and contact details] Tenant or site contact: [name and contact details] Access instructions: [appointment, keys, parking and restricted areas] Stopcock or isolation information: [location and coordination contact] Required records: [findings, photographs, tests and completion notes] Invoice recipient: [name and email] Invoice reference: [work-order or purchase-order reference]
Send missing fields back to the instructing contact. Do that before the job enters the diary.
Set plumber approval limits and a stop point
Plumber approval limits control spending within an agreed scope. They are not permission to complete any repair that happens to cost less than the limit.
Ask the agent what the limit includes. Record whether it covers attendance, diagnosis, make-safe labour, permanent repair labour, materials, equipment or another job-specific cost. Deduct authorised attendance and diagnosis, then tell the plumber the remaining authorised amount before dispatch.
Then write the stop point. It should tell the plumber when to stop, what temporary action is allowed, what evidence to collect and who must approve the next stage.
Opening the agreed access point might show that the failed pipe continues behind a lined wall. Further access will damage a finish that was outside the instruction. Stop there. Control any immediate leak within the authorised make-safe scope. Photograph the condition. Describe the access and reinstatement effects. Then request a variation.
Do not split a repair into smaller entries to stay under a limit. The complete proposed work needs authority.
Confirm access and isolation before dispatch
Call or message the site contact. Confirm the full address, flat, appointment window and name of the person providing entry.
Ask about keys, parking, restricted areas, the internal stopcock and any communal cupboard or plant area that another contact must open.
If the tenant is absent, the keys do not work, the stopcock cannot be reached or the isolation contact does not answer, record the attempt and stop unless the brief authorises another action.
Keep access authority separate from spending authority. A tenant can show the plumber the leak without being allowed to approve a second repair. If the tenant asks for a dripping tap to be fixed while the plumber is already there, record the request and send it to the named approver.
Check whether isolation could affect another flat or a communal service. If coordination is required but the work order names no authorised contact, do not start the isolation. Send the question back to the agent and record the answer against the work-order reference.
Give the plumber one dispatch brief. Do not leave the approval limit in an email, the tenant’s number in a text and the stop point in an office note.
Route UK compliance questions before the visit
A letting agent’s instruction gives commercial authority. It does not answer whether a tradesperson may carry out regulated work.
If the job includes gas work, assign it only after checking the engineer or business and the relevant categories of work on the Gas Safe Register (opens in a new tab).
Route water-fittings questions by nation. In England and Wales, ask the statutory water undertaker about the water-fittings requirements for the proposed work. In Scotland, ask the statutory water supplier about the water byelaws. In Northern Ireland, ask the statutory water undertaker about the Northern Ireland water-fittings requirements. Give the authority the fitting, service and proposed work rather than asking a general plumbing question.
Opening up or reinstatement can also create a building regulations approval question. In England and Wales, take that question to building control. In Scotland, use building standards. In Northern Ireland, use local council building control. Ask about the proposed alteration and write the answer into the job record.
These checks happen after you understand the proposed scope and before you commit to the work. Commercial approval, access authority and compliance are separate gates.
Diagnose the fault against the instruction
Start at the location named in the work order. Identify the exact fixture, pipe, valve, appliance connection or service involved. Record whether the condition matches the reported fault.
The plumber should capture:
- Arrival and departure details.
- Exact fault location.
- Visible condition before work.
- Tests completed and findings.
- Water isolation used or proposed.
- Immediate make-safe action.
- Labour used on the authorised scope.
- Materials fitted or consumed.
- Photographs before, during and after the work.
- Testing after the repair.
- Work left incomplete and the reason.
Write what happened. “Leak fixed” tells the office very little. Name the leaking component, its location, the work completed and the result of the final test.
The work order may say the leak comes from a basin waste while the inspection shows water entering from concealed supply pipework. Record the mismatch. Do not stretch the original wording to cover a different repair.
Keep diagnosis separate from responsibility. The plumber records the condition. The authorised client decides who should pay and what should happen next.
Raise a written variation before extra plumbing work
A variation explains what changed, why the original instruction no longer covers the job and what you propose to do.
Link it to the original work-order reference. Include:
- Property and exact location.
- Original authorised outcome.
- Condition found on site.
- Work completed before the stop point.
- Proposed extra labour and materials.
- Destructive access required.
- Effect on other flats or communal services.
- Isolation arrangements.
- Reinstatement included or excluded.
- Selling price for the extra work.
- Named person asked to approve it.
Photographs support the explanation. They do not define the proposed scope. The approver should not have to study a picture of an open wall and guess what you want to do.
Send the variation to the recorded spending approver. Get the decision in writing. Record the name, time, approved scope and reference. Then restart.
If only urgent make-safe work is authorised, complete that action and leave the permanent repair pending. The plumber variation process for hidden pipework gives a fuller document sequence for that situation.
Price labour, materials and markup from cost
Start with the cost of doing the proposed work. Include direct labour, materials, equipment, subcontracted work and job-specific costs.
Recover overhead in one of two ways. Include a job-specific overhead allocation in the cost base, or set markup from your own figures so it recovers overhead as well as profit. Markup on labour and materials alone does not guarantee a sound selling price.
Calculate the price in this order:
- Add labour, materials, equipment, subcontracted work, job-specific costs and any overhead allocation used in the cost base.
- Multiply that cost base by your chosen markup percentage to get the markup amount.
- Add the markup amount to the cost base to get the selling price.
- Subtract the cost base from the selling price, then divide the result by the selling price to check the margin.
When overhead sits in markup rather than the cost base, treat the result as contribution before overhead, not finished-job profit.
Use your own records. Do not borrow a labour rate or materials allowance from another business. The job pricing framework for labour, materials and markup sets out the order of the calculation.
Worked example: connect the instruction, variation and invoice
The Oak Street house example is an electrical job, but its document control applies to managed property plumbing. All figures are sample currency units, not a rate card.
R. Chen’s job at 14 Oak Street covered a bathroom exhaust fan and four LED downlights. Quote Q-1847 totalled 1,105. The ceiling was lined, and the quote excluded chasing. Extra cable and chasing were approved on site as a 160 variation. Invoice INV-1847 totalled 1,265.
The original job cost was 850. Against the original quote, 1,105 − 850 = 255 profit. The margin was 255 ÷ 1,105, or about 23%, and the markup was 255 ÷ 850, or 30%.
The costs of the 160 variation are not given. Do not combine the 1,265 invoice with the 850 original job cost to calculate profit. Keep cost tracking for the original scope and variation separate.
Close the job with an invoice accounts can match
Put the work-order reference on the job brief, variation, completion record and invoice. Use the invoice recipient named in the original instruction unless the authorised client changes it in writing.
Send accounts the work-order reference, invoice descriptions matched to the approved scope, written variation approval and the completion evidence requested for billing. Keep the full job brief, site notes, photographs, readings, test records and cost records in the internal job file.
Use plain invoice descriptions that match the approved documents. Do not hide the variation inside a broad labour line.
For plumber letting agent work, reconcile the actual labour, materials and job-specific costs after completion. Finished-job cost tracking and job-cost review shows whether the original instruction and the extra work each recovered their costs.