Make the property safe and limit damage
If water is escaping, isolate it if this can be done safely and call an appropriate emergency contractor. For gas smells, electrical danger or structural instability, keep people away and use the relevant emergency service or qualified professional. Do not delay urgent action while trying to establish who will eventually pay.
Photograph the condition before temporary work where possible. Keep damaged parts, receipts and a note of calls. Ask a contractor to describe the cause and immediate work rather than writing only “repair carried out”.
Check whether a home emergency policy or account benefit provides an initial call-out, but read what it covers before authorising work. An emergency contractor's job may be to stop the leak, not diagnose every concealed defect or complete permanent reinstatement.
Check the documents you already have
Read the property information form, fixtures list, survey, conveyancer's report, policy schedule and any guarantees. Compare the exact wording with what you found. A seller is not normally responsible for every fault that appears after completion, but an inaccurate formal reply can be significant.
Note when the problem became apparent and what evidence suggests it existed earlier. Avoid altering the area more than safety requires until the relevant adviser has had an opportunity to see it.
Contact the right person with a focused account
Send the conveyancer a contractual or seller-disclosure concern. Ask the surveyor about a defect that appears to have been visible and within the inspection scope. Notify the insurer promptly about possible insured damage and follow instructions before permanent repairs.
Provide dates, photographs and the relevant document. A long message sent to every organisation can blur the issue. Ask each one whether they need an inspection and what you should do next.
Where neighbours or common parts are involved, notify the freeholder, managing agent or adjoining owner calmly and in writing. Water may travel between flats in a way that makes the visible damage a poor guide to the actual source.
Understand the limits of surveys and guarantees
A survey is an inspection subject to its written scope and access. Floors, walls and roofs may conceal defects that could not be seen without opening the building. A missed item is not automatically negligence, though you can use the firm's complaints process if the report did not meet the agreed service.
Guarantees vary. Check who issued the document, what work it covers, whether it transferred to you and what exclusions or notification deadlines apply. A guarantee is not useful merely because its title sounds comprehensive.
Insurance claims need accurate information
Sudden insured damage and long-term deterioration are treated differently in many policies. Describe what happened without guessing at a technical cause. The insurer may appoint someone to inspect and may require emergency measures to prevent further loss.
Check the excess and cover for trace and access, alternative accommodation or matching items as relevant. Keep the insurer updated if contractors uncover something different from the first explanation.
Keep repair and complaint decisions separate. You may need to make the home usable long before responsibility is agreed. Tell the other party what work is proposed, allow inspection where sensible and retain evidence of the original condition.
Escalate a complaint in the right order
Use the firm's written complaints process and state the outcome you seek. Keep copies and note response dates. Professional bodies and ombudsman schemes may help in some circumstances, but their jurisdiction and time limits differ.
For a substantial loss, consider independent legal advice before accepting a final settlement or beginning major destructive work. Small claims can become expensive disputes, so compare the likely recovery with expert and legal costs.
For concealed damage, ask the contractor to photograph each stage as it is opened. Images of a leaking joint, decayed timber or altered support can be far more useful than photographs taken after everything has been removed. Keep samples only when the professional or insurer asks for them, and label where they came from. Ask for an invoice separating emergency work, investigation and permanent repair, with the affected room clearly identified.