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Check a Builder Quote

How to Review a Builder’s Quote Before You Accept It

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How to Review a Builder’s Quote Before You Accept It

A builder’s quote can look straightforward at first glance.

There may be a total price, a list of works and perhaps a payment schedule.

But two quotations for the same project can look similar while actually covering very different scopes of work.

Before choosing a contractor, it is important to understand:

  • What is included
  • What is excluded
  • Which figures are fixed
  • Which figures are allowances
  • Whether VAT is included
  • Whether the quote matches the drawings
  • Whether important work is missing
  • Whether important work is missing
  • Whether the programme appears realistic

A lower quote is not necessarily better value if significant parts of the work have been left out.

At Tholos Architects, we help clients review builder quotations so they can compare contractors on a more consistent basis before making an appointment.

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Check a Builder Quote explained

Why Builder Quotes Can Be Difficult to Compare

Builders do not always prepare quotations in the same way.

One contractor might provide:

  • Detailed labour and material breakdowns
  • Clear exclusions
  • Identified provisional sums
  • Specific allowances
  • A programme

Another may provide little more than:

  • A short description
  • A total price
  • Identified provisional sums
  • Specific allowances
  • A programme

Both documents may technically be quotations, but they do not provide the same level of information.

This is why simply comparing the final figure can be misleading.

Make Sure Everyone Has Priced the Same Project

Before comparing prices, check what information each builder received.

Ideally, all contractors should price from the same set of documents.

Depending on the project, these may include:

  • Architectural drawings
  • Structural drawings
  • Building Regulations information
  • Specifications
  • Kitchen layouts
  • Bathroom layouts
  • Window and door information
  • Schedule of works
  • Client requirements

If one builder prices from a detailed technical package while another prices from early planning drawings, the quotations may not be directly comparable.

Check That the Quote Matches the Drawings

The quotation should reflect the project you intend to build.

Compare it against the drawings and look for important elements such as:

  • Demolition
  • New walls
  • Structural openings
  • Roof construction
  • Windows and doors
  • Drainage
  • Internal alterations
  • Finishes
  • External works

If something appears on the drawings but does not appear anywhere in the quote, ask whether it has been included.

Do not assume.

Check the Scope of Work

A strong quotation should explain what the contractor is actually providing.

Depending on the project, the scope may include:

  • Site setup
  • Demolition
  • Groundworks
  • Foundations
  • Structural steel
  • Masonry
  • Roofing
  • Windows and doors
  • Insulation
  • Plumbing
  • Heating
  • Electrical work
  • Plastering
  • Joinery
  • Tiling
  • Decoration
  • Flooring
  • External works
  • Waste removal
  • Scaffolding

The exact list varies by project.

What matters is that the scope is clear enough for you to understand what the price covers.

Look Carefully at What Is Excluded

Exclusions are one of the most important parts of a builder’s quote.

Common exclusions can include:

  • Kitchen supply
  • Kitchen installation
  • Sanitaryware
  • Tiles
  • Flooring
  • Decoration
  • Landscaping
  • Specialist glazing
  • Professional fees
  • Building Control fees
  • Party-wall costs
  • Utility-company charges

There is nothing inherently wrong with exclusions.

The problem comes when the client assumes something is included and discovers later that it is not.

Ask for exclusions to be clearly identified.

Check for Missing Work

Some items may not be described as exclusions simply because they have been overlooked.

That is why the quotation should be checked against the full project information.

Potentially missed items can include:

  • Temporary works
  • Structural support
  • Drainage alterations
  • Making good
  • Decoration
  • Skirting and architraves
  • Waste disposal
  • Scaffolding
  • Certification
  • Protection to existing areas

A missing item can later become an additional cost.

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Check Provisional Sums

A provisional sum is an allowance for work that cannot yet be priced accurately.

This may happen because:

  • The design is incomplete
  • The existing condition is unknown
  • A specialist has not yet provided a price
  • The exact quantity cannot yet be established

Examples might include:

  • Groundworks
  • Drainage alterations
  • Structural repairs
  • Specialist finishes

A provisional sum is not necessarily a problem.

But you should understand that the final cost may be higher or lower than the allowance.

Check Prime Cost Allowances

Some quotes include allowances for items that have not yet been selected.

These may include:

  • Sanitaryware
  • Tiles
  • Kitchen equipment
  • Ironmongery
  • Light fittings

If the allowance is unrealistically low, the final project cost may rise once you make actual selections.

Check whether the allowance reflects the quality level you expect.

Check Whether VAT Is Included

Always check the VAT position.

The quotation should make clear whether VAT is:

  • Included
  • Added separately
  • Not applicable

If VAT is applicable but has not been included in the headline figure, the real project cost can be significantly higher than it first appears.

Check Labour and Materials

Ask whether the quotation includes both labour and materials.

Also check whether any items are expected to be:

  • Purchased directly by you
  • Supplied by the builder
  • Installed only
  • Collected or delivered separately

Clear responsibility for procurement can prevent confusion later.

Check Who Supplies the Kitchen

Kitchen-related costs can vary considerably.

Clarify:

  • Who supplies the kitchen
  • Who installs it
  • Whether appliances are included
  • Whether worktops are included
  • Whether plumbing connections are included
  • Whether electrical connections are included

A quote stating “kitchen installation” may not necessarily include everything you assume.

Check Bathrooms and Sanitaryware

Bathroom work can be handled in different ways.

Ask whether the quotation includes:

  • Sanitaryware
  • Taps
  • Shower fittings
  • Tiles
  • Waterproofing
  • Installation
  • Plumbing
  • Extract ventilation
  • Decoration

Again, separate supply and installation responsibilities should be clear.

Check a Builder Quote

Check Electrical Work

Electrical work is often described too generally.

Look for detail around:

  • Number of sockets
  • Switches
  • External lighting
  • Consumer unit work
  • Smoke alarms
  • Kitchen circuits
  • Electric heating where applicable

If the project requires many fittings, vague electrical allowances can create additional cost later.

Check Plumbing and Heating

The quotation should make clear whether it includes:

  • New pipework
  • Radiators
  • Underfloor heating
  • Boiler alterations
  • Hot-water work
  • Waste connections
  • External taps
  • Testing and commissioning

If existing systems need alteration, that should also be addressed.

Check Structural Work

Structural work can represent a significant part of the cost.

Ask whether the quotation includes:

  • Structural steel
  • Padstones
  • Columns
  • Temporary supports
  • Openings
  • Installation
  • Crane or lifting requirements where necessary
  • Making good

A line reading simply “steelwork” may need clarification.

Check Groundworks

Groundworks can contain uncertainty, particularly before excavation begins.

The quote may need to cover:

  • Excavation
  • Foundations
  • Disposal of soil
  • Drainage
  • Concrete
  • Hardcore
  • Ground floor build-up

Ask whether the price assumes specific ground conditions or depths.

Check Scaffolding

Scaffolding can be a substantial cost.

Clarify:

  • Whether it is included
  • How long it is allowed for
  • Whether additional hire may be charged
  • Whether specialist scaffold arrangements are required

This is especially relevant for:

  • Loft conversions
  • Roof work
  • Double-storey extensions
  • External renovation

Check Waste Removal

Do not assume waste disposal is included.

Ask whether the quote covers:

  • Skips
  • Waste collection
  • Demolition waste
  • Excavated material
  • Packaging
  • Final clearance

Also check whether any hazardous or specialist waste is treated separately.

Check Decoration

Some contractors include decoration.

Others stop after plastering or basic making good.

Clarify whether the quotation covers:

  • Preparation
  • Mist coats
  • Final paint finish
  • Woodwork
  • Existing areas affected by construction

Check Flooring

Flooring may be:

  • Fully included
  • Installation only
  • Excluded entirely
  • Included as an allowance

Make sure you know whether the price covers:

  • Supply
  • Underlay
  • Installation
  • Trims
  • Thresholds
  • Floor preparation

Check External Works

External works can easily be forgotten.

These may include:

  • Patios
  • Paths
  • Steps
  • Drainage channels
  • Landscaping
  • Fencing
  • Repairs to driveways
  • Making good around excavations

If external areas will be affected by construction, check how they will be left at completion.

Check Temporary Works

Construction often requires temporary measures.

These might include:

  • Temporary support
  • Weather protection
  • Temporary doors
  • Protection to existing finishes
  • Dust screens
  • Temporary services

These costs should be understood rather than appearing unexpectedly later.

check a builder quote

Check Building Control and Certification

Clarify which costs and responsibilities sit with the builder.

Depending on the project, this may involve:

  • Building Control inspections
  • Electrical certification
  • Gas certification
  • Window certification
  • Commissioning documents
  • Other specialist certificates

Professional and statutory fees may be excluded from the building quote even where the contractor coordinates the related work.

Check the Payment Schedule

A quote may include a proposed payment structure.

Make sure you understand:

  • Deposit
  • Stage payments
  • Interim valuations
  • Final payment
  • Retention where applicable

Payments should make sense in relation to the work being carried out.

A quote that requires a large proportion of the contract price before equivalent progress has been made deserves careful review.

Check What the Deposit Covers

If the builder asks for a deposit, ask why.

It may relate to:

  • Advance materials
  • Bespoke windows
  • Structural steel
  • Kitchen orders
  • Specialist products

The reason should be transparent.

Check the Construction Programme

The quote may state a duration or expected start date.

Ask:

  • When can the project start?
  • How long is it expected to take?
  • Does the builder have other projects running?
  • Are any long-lead items likely to affect the programme?
  • Heating equipment

A very short proposed programme can be just as questionable as an excessively long one if it does not match the amount of work involved.

Check Whether the Quote Is Fixed

Ask whether the price is:

  • Fixed
  • Estimated
  • Subject to review
  • Based on allowances
  • Dependent on material prices

The terminology matters.
A quotation can still contain variable elements even where there is a headline total.

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Check How Variations Will Be Priced

Changes happen on construction projects.

Ask how the builder deals with variations.

A good process should make clear:

  • What has changed
  • Why
  • Additional cost
  • Any credit for omitted work
  • Programme effect

Where practical, variations should be agreed before the work proceeds.

Check for Contradictions

Builder quotations sometimes contain internal inconsistencies.

For example:

Possible improvements include:

  • One section says decoration is included
  • Another says decoration is excluded

Or:

  • Windows appear in the scope
  • But the exclusions say client-supplied glazing

These issues should be clarified in writing before the quotation is accepted.

Compare Builder Quotes Like for Like

If you have several quotations, create a comparison based on individual elements rather than only the final total.

Compare:

  • Scope
  • Exclusions
  • Allowances
  • VAT
  • Programme
  • Payment terms
  • Materials
  • Specialist works
  • Certification
  • External works

This often explains why one contractor appears substantially cheaper than another.

Why the Cheapest Quote Can Be Misleading

A low quotation may genuinely represent good value.

But it can also be lower because it includes less.

For example, one builder may exclude:

  • Decoration
  • Flooring
  • Scaffolding
  • Kitchen installation
  • Waste removal

while another includes all of them.

Once those costs are added later, the supposedly cheaper quote may not remain cheaper.

Why the Most Expensive Quote Is Not Automatically Best

Price alone works in both directions.

The highest quotation is not automatically the most complete or highest-quality option.

You still need to assess:

 

  • Scope
  • Relevant experience
  • Organisation
  • Communication
  • Programme
  • References

A higher number does not remove the need for due diligence.

check a builder quote 

Ask the Builder to Clarify Unclear Items

If something is vague, ask.

Useful clarification questions might include:

  • Is this included in the total?
  • What does this allowance cover?
  • Is VAT included?
  • Who supplies this item?
  • Does this include installation?
  • Is disposal included?
  • Is decoration included?
  • What happens if the actual cost exceeds the allowance?

A professional builder should be able to explain their quotation.

Get Clarifications in Writing

Important changes or explanations should ideally be recorded in writing.

If a builder verbally confirms that something is included, ask for the quotation or associated documentation to be updated.

This reduces the risk of different recollections later.

Do Not Accept a Quote You Do Not Understand

You do not need to understand every technical construction detail.

But before accepting a quote, you should understand:

  • What you are buying
  • What you are not buying
  • What might change
  • When payments are due
  • How the final cost could move

If the quotation cannot be explained clearly, that is a problem in itself.

How Tholos Can Help Review Builder Quotes

Where Tholos is involved in your project, we can help assess whether quotations reflect the proposed work.

Depending on the project and service, this may include:

  • Reviewing the scope
  • Comparing quotations
  • Identifying exclusions
  • Highlighting allowances
  • Checking against drawings
  • Identifying potential omissions
  • Preparing clarification questions

The aim is not simply to identify the cheapest contractor.

It is to help you understand what each contractor is actually offering.

 

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Builder Quote Checklist

Before accepting a quotation, check:

  • Contractor identity
  • Drawing revision
  • Scope
  • Exclusions
  • Provisional sums
  • Allowances
  • VAT
  • Labour
  • Materials
  • Structural work
  • Electrical work
  • Plumbing
  • Heating
  • Kitchen
  • Bathrooms
  • Decoration
  • Flooring
  • Scaffolding
  • Waste
  • External works
  • Programme
  • Deposit
  • Payment schedule
  • Variations
  • Certification

Anything unclear should be resolved before appointment.

Client experience

"

Lorem ipsum dolor sit amet, consectetur adipiscing elit. We had a vision for our home but no idea how to realise it. Tholos Interiors took complete ownership of the project — every detail was considered, every decision explained. The result exceeded everything we had imagined.

– Lawrence Ipsum, Homeowner · London –

Frequently Asked Questions

What should a builder quote include?

A builder’s quote should clearly describe the proposed work, total price, relevant allowances, exclusions, VAT position and any important assumptions.
For larger projects, more detail is generally preferable.

How do I compare two builder quotes?

Check whether both builders have priced the same drawings and scope.
Then compare inclusions, exclusions, provisional sums, allowances, programme and payment terms rather than only the final totals.

Why are builder quotes so different?

Differences may arise from:

  • Scope
  • Materials
  • Labour
  • Overheads
  • Experience
  • Programme
  • Exclusions
  • Allowances

A large difference should be investigated before making a decision.

What is a provisional sum in a builder quote?

A provisional sum is an allowance for work that cannot yet be priced accurately.

The final amount may change when the work or specification becomes clearer.

Can an architect check a builder’s quote?

Yes. Depending on the service provided, an architect can help review the quotation against the project information, identify omissions and compare different contractor proposals.

Understand the Quote Before You Choose the Builder

A builder’s quote should help you understand the cost of delivering your project.

It should not leave you guessing what has or has not been included.

Taking the time to review:

  • Scope
  • Exclusions
  • Allowances
  • Programme
  • Payment terms

before appointing a contractor can prevent much bigger problems during construction.

At Tholos Architects, we can help clients assess builder quotations and approach contractor selection with clearer information.

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Disclaimer

This article is part of a series created by our dynamic marketing team for informational purposes only. While we strive to review all content thoroughly, occasional oversights may occur, even after publication. Therefore, we cannot accept liability for any interpretations or use of the information provided. For the most up-to-date information or to report any discrepancies, please contact us at hello@tholos-architects.com.

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