The most common reason a renovation drifts off course is not bad luck — it is an unrealistic budget set at the very beginning. Before you ring a single builder, sit down and work out what you genuinely have available, then add a contingency of at least 10 per cent. If your home is Victorian, pre-1930s, or you are opening up walls, make that 15 to 20 per cent. Older properties have a habit of revealing surprises behind the plasterboard.
When quotes come in, ask for an itemised breakdown rather than one lump sum. You want to see labour, materials, waste removal, scaffolding, and skip hire priced separately. That way, if you decide to change the kitchen tiles halfway through, the builder can tell you exactly what it costs. Confirm whether each figure includes VAT at 20 per cent — the difference between a quote and an estimate matters enormously, and only a quote is a fixed price.
Agree a payment schedule tied to milestones, not dates. A sensible structure is a small deposit of 5 to 10 per cent, then staged payments as work completes: first fix, plaster, second fix, decoration. Always retain 5 per cent until the snagging list is signed off. Never pay for work that has not been done.
Ask your builder for a written programme showing which trades will be on site when. Plumbers, electricians, plasterers and joiners all need to follow each other in the right order, and gaps between them are normal — but they should be planned gaps, not accidents.
Be realistic about drying and curing times. Fresh plaster needs several days to dry before decorating. Screed over underfloor heating must cure slowly before the heating is switched on. These are not delays; they are part of the job, and rushing them causes cracks and callbacks later.
Personal recommendations remain the best source of good tradespeople, but do your own checks. Visit a previous project, speak to that customer, and ask to see photos of work in progress. Confirm the builder's public liability insurance and, if they employ staff, their employer's liability cover. Ask for their company registration details and a written address.
Before work starts, put the scope in writing. A simple contract such as the JCT Minor Works form is widely used for domestic projects and covers payment, variations and dispute resolution. Even a detailed email exchange setting out the specification, price, start date and completion date is far better than a handshake.
Agree how variations will be handled. Any change to the plan should be confirmed in writing with a price and a time impact before the work is carried out, otherwise you lose control of both your budget and your calendar.
A short weekly check-in, in person or by phone, prevents small misunderstandings becoming expensive arguments. Ask what is happening next week, what is needed from you, and whether anything is behind schedule. Keep a shared note or a messaging group for decisions, so nothing is agreed and then forgotten.
Being decisive saves money. Every day a trade is standing around waiting for you to choose a tile or a tap is a day you may be billed for. If you cannot decide quickly, ask the builder to move on to another area and come back.
Keep a snagging list from day one rather than saving everything for the end. Small defects — a sticking door, a chipped tile, a socket in the wrong place — are easier to fix while the relevant trade is still on site.
Tell your buildings insurer that major work is taking place. Many policies require notification, and failing to do so could leave you without cover if something goes wrong. Move valuables and anything irreplaceable off site.
Create a dust barrier and seal doorways with plastic sheeting. If the kitchen is out of action, set up a temporary one with a kettle, microwave and washing-up bowl somewhere out of the way. Discuss access to the bathroom and agree a daily time when the water will be back on.
Hidden rot, old asbestos, inadequate lintels, faulty drains and party wall issues all appear once walls are opened. A party wall agreement is legally required for certain work on shared walls in England and Wales, so check before you start. If your home is listed, listed building consent is separate from planning permission.
At the end, collect every certificate: electrical installation certificates, a gas safety record, window and door compliance certificates from a competent person scheme, and the Building Control completion certificate. Keep them with your deeds — they will be needed when you sell.
Pay the final retention only once you are satisfied, and keep a folder with the contract, invoices, certificates and any warranties. A well-managed renovation is not one without problems; it is one where the problems were anticipated, discussed early, and resolved without drama.
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