What Should Be Included in a Building Quote?

A useful building quote should do more than state a total. It should explain what the contractor is agreeing to provide, what information the price is based on and which items are excluded or still uncertain.

The clearer the scope, the easier it is to compare contractors, manage changes and avoid disputes later. A low headline figure can become poor value if important elements have simply been left out.

The terms are sometimes used casually, so ask the contractor what the document represents.

An early budget may be a broad figure used to test feasibility before the design is complete.

An estimate is generally an informed prediction based on available information and may change as the scope becomes clearer.

A quotation normally sets out a more defined offer for specified work, subject to the terms, assumptions and exclusions stated.

The label alone is not enough. Read what the contractor says about validity, variations and hidden conditions.

The quote should identify the property and describe the project. For extensions or major renovations, it should reference the relevant drawing numbers, revisions, structural information and specification.

This prevents a common problem: one contractor pricing an older drawing while another has included later design changes.

Before accepting, check that the documents referenced are the latest versions and that all significant revisions have been issued to every bidder.

Temporary works can be a meaningful part of a construction project. The quote should make clear whether it includes items such as:

• site protection
• temporary fencing
• welfare arrangements
• scaffold or access equipment
• skips and waste handling
• protection to existing floors and finishes
• temporary weatherproofing
• delivery handling
• security measures

If access is difficult, identify any assumptions about parking, storage or working hours.

For renovations and extensions, describe what is being removed. "Strip out kitchen" can mean very different things depending on whether it includes flooring, wall finishes, old services, disposal and making good.

If materials are to be retained for reuse, label them clearly. Agree who is responsible for safe storage.

The quote should also explain how suspected hazardous materials or unexpected conditions are handled if they are discovered.

Extension quotes should state the assumed foundation type, excavation, concrete, spoil removal and any drainage alterations included.

Ground conditions are not always fully known before excavation. If the price assumes a particular depth or soil condition, that assumption should be visible rather than hidden.

Where structural engineers or building control may require changes after excavation, understand how the contractor will price the variation.

Structural steel, lintels, posts, masonry alterations and temporary supports should be linked to the engineer's design where applicable.

Check whether the quote includes supply, lifting, installation, padstones, fire protection and making good. A price that says only "steelwork" may not clarify these connected tasks.

The same principle applies to timber structures, roof alterations and floor strengthening.

The quote should describe walls, insulation, roof build-up, external finishes, windows, doors, flashings and roof drainage.

Material descriptions should be specific enough for you to understand what is being supplied. If substitutions are allowed, agree how equivalent performance will be judged.

For roofing work, our roof repair or replacement guide shows why the supporting layers matter as much as the visible covering.

Confirm whether plumbing includes first-fix pipework, final connections, sanitaryware installation, heating alterations, testing and commissioning.

Client-supplied fixtures need clear boundaries. If you are buying taps or sanitaryware yourself, establish who checks compatibility and what happens if items arrive late or are damaged.

For new bathrooms, bathroom plumbing planning helps identify drainage and service requirements before the quote is finalised.

Electrical allowances can vary widely between quotations. Count sockets, lighting points, switches, data points and special circuits rather than accepting a vague phrase such as "electrics included".

Confirm whether the price includes testing, certification, consumer-unit work, smoke alarms, external lighting and connection of appliances.

If an existing installation needs remedial work, establish whether this is included or will be quoted separately after testing.

For kitchens, clarify whether the contractor is supplying units, fitting client-supplied units, connecting appliances, installing worktops or completing only structural preparation.

For bathrooms, separate sanitaryware supply from plumbing labour and tiling.

Joinery items such as doors, skirting, architraves, stair alterations and built-in storage should also be listed so they are not assumed by one party and excluded by the other.

Plastering, floor finishes, tiling and decoration are frequent sources of scope gaps.

Ask what level of wall preparation is included, how many rooms are decorated, whether ceilings and woodwork are included and who supplies paint or tiles.

If the project stops at a "ready for decoration" stage, define what that means. A newly plastered room and a fully sanded, primed surface are not necessarily the same scope.

Extensions disturb gardens, paths and driveways. The quote should state whether it includes reinstating paving, landscaping, fences, drainage channels or external steps.

If these are excluded, plan for them separately rather than assuming the site will automatically be restored to its previous condition.

Proper Trades offers landscaping services where external work follows construction.

A provisional sum is an allowance for work or items that cannot yet be fully defined. It can be useful, but too many allowances make the final total uncertain.

Examples might include kitchen supply, sanitaryware, specialist groundworks or work dependent on opening up the building.

Ask what each allowance covers and whether labour, delivery or installation are included. If one quote uses a very low allowance and another uses a realistic specification, the totals may look different even though the second quote is more complete.

Exclusions are as important as inclusions. Common exclusions can include:

• professional fees
• planning or building-control fees
• party wall surveyors
• utility company charges
• asbestos removal
• client-supplied fixtures
• decoration
• floor finishes
• external landscaping
• temporary accommodation

The exact list varies. The important point is that you should be able to see what remains your responsibility.

A quote should give some indication of anticipated duration or sequencing for significant work, while acknowledging that weather and hidden defects can affect the programme.

Check working hours, access requirements and any dates that rely on client decisions or product delivery.

Avoid treating an indicative programme as an unconditional completion guarantee. Instead, understand the dependencies and how changes will be communicated.

Payment terms should be clear before work starts. Larger projects commonly use staged payments linked to progress or agreed milestones.

The exact structure should reflect the project and contract. Be cautious of arrangements that require a disproportionate amount to be paid before equivalent work or materials have been supplied.

Keep invoices and variation approvals matched to the agreed payment process.

No quote can describe genuinely unknown conditions with certainty, particularly in older buildings. What matters is the process for dealing with them.

Ask how the contractor will explain additional work, provide a price or basis of charge and obtain approval before proceeding where practicable.

Likewise, if you request a design change, record it in writing so both parties understand the cost and programme implications.

Create a comparison sheet with the same headings for each contractor: site setup, demolition, structure, roof, windows, plumbing, electrics, finishes, external works, provisional sums and exclusions.

Do not immediately add missing items to the lowest quote yourself. Ask the contractor to clarify and revise the quotation so the responsibility remains clear.

The most useful comparison is not "who is cheapest?" but "who has priced the complete agreed scope most clearly?"

Proper Trades coordinates construction projects across the Midlands and prepares project requirements before appropriate trade teams are arranged.

Proper Trades connects homeowners and businesses across the Midlands with request a free trade quote.

For further guidance, read our extension planning guide.

For further guidance, read our reducing renovation disruption guide.

For further guidance, read our renovation vs rebuild decision guide.

1. Should a building quote list materials?

It should describe important materials or specifications clearly enough that you understand what is being priced. For major products such as windows, roof systems or sanitaryware, more detail reduces the risk of mismatched expectations.

2. Should VAT be shown on a builder's quote?

The quotation should make clear whether VAT applies and whether the stated total includes it. The contractor's tax status and the work involved determine the treatment, so ask for clarity rather than assuming.

3. What is a provisional sum?

It is an allowance for work or an item that is not fully defined when the quote is prepared. Ask what assumptions sit behind the allowance and how the final amount will be adjusted once the scope is known.

4. How many builder quotes should I get?

There is no mandatory number for ordinary private work, but comparing more than one suitable contractor can help you understand differences in scope and approach. Quality of information matters more than collecting a large number of vague totals.

5. What if a builder finds hidden damage?

The contract or quotation should explain the variation process. The contractor should normally document the issue, explain the proposed remedy and agree the additional work before proceeding where circumstances allow.

6. Is the lowest building quote usually the best value?

No. A lower quote may exclude work, use smaller allowances or assume a different specification. Compare the detailed scope, contractor capability and project management as well as the total.