Contractor Interview Preparation Checklist

Be ready to say plainly how far the design has been taken, whether drawings exist, and whether anything has been submitted anywhere yet.

A contractor responds very differently to a settled design and to an idea, and pretending to be further along than you are helps nobody.

Write down which other professionals are already involved and what each of them is doing, including anyone who has only visited once.

Overlapping appointments cause more confusion on site than almost anything else, and a builder needs to know who else has a say.

Say clearly whether the property will be occupied while work goes on, and if so, which rooms the household has to keep using throughout.

Working around an occupied house changes how a site is run, and a contractor who learns this late will have based their thinking on something else.

Note the parts of the work you genuinely have not decided yet, and say so, rather than leaving the impression that everything is settled.

Undecided items are the usual source of later change, and naming them early is the single most useful piece of honesty in the conversation.

Be able to say who in the household will be the point of contact and who else would need to agree before an instruction is given.

Contractors lose considerable effort on sites where two people give different instructions, and they will want to know how that is handled.

Describe what you want the finished space to do rather than the technique you imagine achieving it, and say when you are only guessing at the method.

An owner who specifies a method takes on responsibility for it, often without realising that the responsibility has moved.

Walk the contractor through the physical route of the work in the order it would happen, pointing at each place rather than describing it from a table.

Standing in the space surfaces awkward details, such as a boiler in the way or a floor that steps down, that a drawing rarely conveys.

Point out the defects you can already see, such as damp patches, cracked plaster or a door that has stopped closing, without proposing what causes them.

Existing conditions shape what a contractor is willing to take on, and hiding them tends to produce a change of position later.

What a crack, stain or movement actually indicates is for a qualified professional to establish, not for you or the builder to settle in conversation.

State which parts of the property are to be left entirely alone, including finishes, planting and anything sentimental you would not want disturbed.

Protection of what stays is a real part of the work and is frequently omitted from a response because nobody mentioned it.

Say which items you intend to obtain yourself and which you expect the contractor to obtain, and make sure the same split reaches everyone you speak to.

A split that differs between conversations is the most common reason two written responses cannot be compared at all.

Describe what you expect the area to look like when the work stops, including whether making good extends into the adjoining rooms.

Making good is understood very differently by different builders, and the boundary is easiest to draw before anyone starts.

Note where vehicles could realistically stop and unload, whether that is on the street, on a shared drive, or nowhere obvious at all.

Unloading arrangements shape how a builder plans deliveries and can quietly become the reason a site works or does not.

Walk the route materials would take from the vehicle to the work area, noting narrow gates, steps, soft ground and anything that would need protecting.

The route in is where floors get damaged and lawns get destroyed, and agreeing protection in advance avoids a dispute about who ruined what.

Identify where materials and skips could sit without blocking a door, a bin store or a neighbour, and ask what space the contractor would actually need.

Storage is routinely assumed rather than agreed, and a site with nowhere to put anything runs badly from the first delivery.

Establish what the contractor expects to use for water, power and welfare facilities on site, and note what is actually available at the property.

Assumptions about using the household supply or the household bathroom cause friction quickly if they were never discussed.

Ask what working hours the contractor would expect to keep, and confirm separately what restrictions apply in your area.

Hours affect the household more than almost any other arrangement, and expectations differ widely between contractors.

Restrictions on working hours and noise vary by location and are confirmed with your local authority, not agreed between you and the builder.

Note which neighbours would be directly affected, and ask who would speak to them and about what if something needed to be arranged.

Neighbour relationships outlast the project, and leaving it unclear who communicates tends to mean nobody does.

Anything that touches a neighbour's land, wall or access raises questions for your own legal adviser before any arrangement is settled on site.

Ask which parts of the work would be carried out by the contractor's own people and which would be brought in from elsewhere.

How much is subcontracted changes how the job is coordinated and who you would actually be talking to about a problem.

Find out who would run the job day to day, whether that person is on site continuously, and who to speak to when they are not there.

Continuity of supervision is one of the clearest practical differences between contractors and rarely appears in any written response.

Ask how the contractor handles running more than one job at a time and what happens to your site when attention is needed elsewhere.

Every contractor juggles work, and how they say they handle it tells you more than a claim of exclusive attention would.

Establish how a question from site would reach you during the working part of the project and how quickly a decision is normally needed.

Decisions requested from site are often needed sooner than an owner expects, and agreeing the route in advance avoids things being decided without you.

Ask how a change to the work would be raised, recorded and confirmed, and whether anything is ever acted on from a conversation alone.

Changes agreed verbally on site are the origin of most disagreements, and the contractor's own habit here is worth hearing described.

Ask who would be in the property when nobody from the household is at home, and how access would be arranged whenever that happens.

Access to an empty house is settled in advance by surprisingly few owners, and it becomes an awkward subject to raise once people are already working there.

Ask which registrations or memberships the contractor holds for the type of work involved, and write down exactly what they tell you.

Recording the answer in their own words gives you something specific to confirm afterwards with the relevant body.

What registration or licensing applies to your work varies by location — confirm requirements and current status with the issuing body or your local authority.

Ask what cover the contractor carries for work of this kind and who would be able to confirm that it is current.

The question is straightforward to ask and the answer is only meaningful when confirmed with the party that provides the cover.

Cover requirements and what any policy actually protects are matters for the provider and your own adviser, not for a site conversation.

Ask which parts of the work would need notifying to anyone, and who would be responsible for doing that notifying.

Responsibility for notifications is easily assumed by both sides, which means it sometimes falls to neither.

Which parts of the work need notifying, and to whom, is confirmed with your local authority rather than settled between owner and contractor.

Find out what paperwork you should expect to be handed when specific parts of the work are finished, and note what they say you would receive.

Paperwork that should have been issued is very hard to obtain once a contractor has left the site.

Check how the specialist parts of the work would be handled and who would be answerable for them if a question arose afterwards.

Knowing where responsibility sits for each specialist element is far easier to establish before anyone starts than afterwards.

Send exactly the same drawings, descriptions and notes to every contractor, and record the date each set went out and to whom.

Any difference in what was issued makes the responses incomparable, however carefully you read them afterwards.

Have each contractor write down what they have deliberately left out, rather than assuming an unmentioned item is included.

Omissions are what actually differ between responses, and they are almost never visible unless someone was asked to state them.

Get each contractor to state the assumptions their response rests on, particularly anything about the existing structure that has not been opened up.

Assumptions are where a response quietly becomes conditional, and hearing them stated lets you see where the risk actually sits.

Write down which questions each contractor asked you, since the questions asked reveal more about how a job would be run than the answers given.

A contractor who asks about drainage, access and existing conditions is thinking about the same things you should be.

If anything about the work changes while you are still talking to several contractors, send the same update to all of them on the same occasion.

Partial updates are the quickest way to end up comparing responses that describe different projects.

Note which of your questions were not answered in each conversation, and put those back in writing rather than letting them lapse.

An unanswered question in the meeting stage tends to become an unresolved item on site.

Capture what was said about the extent of the work in the words that were used, marking anything you were not certain you had understood.

Statements about scope are what you will be comparing, and paraphrasing them turns a careful answer into something firmer than it was.

Note any concern the contractor raised about the property or the design, even if it was mentioned only in passing on the way out.

Passing remarks about the building frequently turn out to be the most valuable thing said in the entire meeting.

Record anything you said that could be taken as a commitment, so that you know what impression the contractor left with.

Owners often forget what they agreed to in a friendly conversation, and it surfaces later as an expectation.

Send your own short written summary of what was discussed rather than waiting to receive one, and keep a copy of what you sent.

A summary sent by the owner sets the record straight while it can still be corrected easily by either side.

Keep the notes for each contractor entirely separate and dated, rather than merging impressions into one running comparison as you go.

Merged notes cause remarks to be attributed to the wrong person, which is difficult to unpick once the meetings are over.