For architects, builders & project managers

An itemised estimate you can hand a client early.

Independent and clearly caveated — it reads as a ballpark, not your fixed quote. Answer the budget question in minutes, without doing a takeoff.

Create an estimate

£1.99 each. No account, no subscription.

Estimating your own home project? You can use it too. Need an editable quote to win the job? Use the builder tool.

Independent numberClearly caveatedPrint or email in a click

Loft Conversion Budget Estimate

SW1A +30%~8 weeks on site396 labour hrs

Low

£58,291

inc. VAT

Mid

£64,768

inc. VAT

High

£77,721

inc. VAT

Build cost£36,836

Contingency (12%)£4,420

Prelims, fees & planning£11,832

Total excl. VAT£64,768

VAT (20%)£12,954

Total incl. VAT£77,721

A budgeting estimate, not a fixed quote. Final cost depends on a site survey and specification.

Why professionals use it

Itemised to the last trade, and caveated to cover you.

The build cost broken down by trade, so a client sees exactly where the money goes — beside the assumptions that keep it a ballpark, not a promise you’re held to.

Build cost breakdown

The build cost, itemised by trade — every stage adds up to the total. Nothing left off, nothing padded.

Build cost (excl. VAT)£36,836

Assumptions made in this estimate

·The property is a detached house.
·Site access is good.
·Ground conditions are sandy gravel, requiring 1m deep foundations.
·The specification is mid-range.
·Costs are adjusted by +30% for the SW1A area.
·Contingency applies only to build costs, not professional fees.
·All costs shown exclude VAT unless stated otherwise.

A few things this estimate doesn’t model precisely

·Internal partition walls inside an extension or loft aren’t separately priced. Assume a small ±£500 swing on open-plan vs partitioned layouts.
·On a hallway-in-whole-house refurb, stairwell-void paint is currently undercounted by ~£200–£400. Builder will catch this on site.
·If your rooms physically straddle into the existing house, the quote may run slightly low. See “Worth checking” if shown.

The genuine report sections, on example data.

See a full sample report

How it works

An independent estimate, from the same data professionals price on.

1 · A few questions

Project type & rough dimensions
Optional details
Postcode
Finish level

2 · We independently calculate

UK labour rates by trade
Regional pricing for the postcode
Live material prices
Contingency by property age

3 · You hand it over

Itemised, with a low to high range
Assumptions & a clear disclaimer
Ready to share, print or email

A budgeting estimate, not a fixed quote, and not tied to any builder.

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For architects, builders & project managers

An itemised estimate you can hand a client early.

Independent and clearly caveated — it reads as a ballpark, not your fixed quote. Answer the budget question in minutes, without doing a takeoff.

Create an estimate

£1.99 each. No account, no subscription.

Estimating your own home project? You can use it too. Need an editable quote to win the job? Use the builder tool.

Independent numberClearly caveatedPrint or email in a click

Loft Conversion Budget Estimate

SW1A +30%~8 weeks on site396 labour hrs

Low

£58,291

inc. VAT

Mid

£64,768

inc. VAT

High

£77,721

inc. VAT

Build cost£36,836

Contingency (12%)£4,420

Prelims, fees & planning£11,832

Total excl. VAT£64,768

VAT (20%)£12,954

Total incl. VAT£77,721

A budgeting estimate, not a fixed quote. Final cost depends on a site survey and specification.

Why professionals use it

Itemised to the last trade, and caveated to cover you.

The build cost broken down by trade, so a client sees exactly where the money goes — beside the assumptions that keep it a ballpark, not a promise you’re held to.

Build cost breakdown

The build cost, itemised by trade — every stage adds up to the total. Nothing left off, nothing padded.

Build cost (excl. VAT)£36,836

Assumptions made in this estimate

·The property is a detached house.
·Site access is good.
·Ground conditions are sandy gravel, requiring 1m deep foundations.
·The specification is mid-range.
·Costs are adjusted by +30% for the SW1A area.
·Contingency applies only to build costs, not professional fees.
·All costs shown exclude VAT unless stated otherwise.

A few things this estimate doesn’t model precisely

·Internal partition walls inside an extension or loft aren’t separately priced. Assume a small ±£500 swing on open-plan vs partitioned layouts.
·On a hallway-in-whole-house refurb, stairwell-void paint is currently undercounted by ~£200–£400. Builder will catch this on site.
·If your rooms physically straddle into the existing house, the quote may run slightly low. See “Worth checking” if shown.

The genuine report sections, on example data.

See a full sample report

How it works

An independent estimate, from the same data professionals price on.

1 · A few questions

Project type & rough dimensions
Optional details
Postcode
Finish level

2 · We independently calculate

UK labour rates by trade
Regional pricing for the postcode
Live material prices
Contingency by property age

3 · You hand it over

Itemised, with a low to high range
Assumptions & a clear disclaimer
Ready to share, print or email

A budgeting estimate, not a fixed quote, and not tied to any builder.