Quantity surveying and estimating from a contractor that builds.
Bayocorp provides quantity take-offs, tender pricing, cost plans and contract support for contractors, subcontractors and developers. Our estimating comes from delivering refurbishment and drylining work ourselves, so the numbers are built around how the work actually goes together on site.
Measured quantities, priced scopes and contracts that say what was agreed.
A price is only as good as the quantities and the scope underneath it. We measure from the drawings, write the scope so it can be priced and checked, and set out what is included, excluded and provisional, so two tenders can actually be compared and a variation can be traced back to a change.
We specialise in drylining take-offs and estimating, and cover all trades across residential and commercial projects.
- Quantity take-offs and area schedules
- Tender pricing and bid preparation
- Cost plans and budget estimates
- Scopes of work, variations and valuations
- JCT and NEC contract support
- Specialist drylining estimating
Where budgets go wrong, and how a cost plan stops it.
Most overruns are visible in the quotation before work starts: provisional sums for work that has not been designed, prime cost sums for items not yet chosen, and gaps between what the drawings show and what the scope says. A cost plan names those risks, sizes the contingency honestly and shows what has to be decided to turn an allowance into a fixed figure.
For contractors we bring the same discipline to the other side: tender submissions that state their assumptions, and variations recorded and valued as they happen rather than reconstructed at the final account.
Read more: Provisional sums: what they mean and how to control them
Why two quotations for the same job rarely describe the same job.
When prices for one project come back far apart, the usual reason is not that one builder is cheap and another expensive. It is that each has priced a different reading of the same incomplete information: one has allowed for making good and another has not, one has included the skip and scaffold licences, one has carried a provisional sum where another has guessed a figure. Normalising tenders against a single scope, line by line, is often the most useful thing a quantity surveyor does before a contract is signed.
We do the same exercise in reverse when we price: every assumption we have made is written down, so the client or main contractor can see what they are comparing.
Read more: How to compare building quotations properly
Commercial support behind the site team.
For firms that need commercial and administrative help without a full in-house team, we provide tender preparation, estimating, cost tracking, variations, project paperwork and document control as an ongoing back-office service.
How Bayocorp runs the work.
Brief and information
Drawings, specifications, the tender or contract documents, and what the estimate or cost plan is for.
Measure
Quantities taken off by element and trade, with the assumptions written down.
Price and review
Priced with clear inclusions, exclusions and provisional items, then reviewed against the scope for gaps.
Support through the contract
Where required, variations, valuations and contract administration through to the final account.
Who we work with.
Contractors, subcontractors, developers and property professionals across London and the South East. Homeowners who want a cost picture before buying or committing to a project usually want our pre-purchase renovation cost plan instead.
Quantity Surveying questions we hear often.
Do you provide estimating for other contractors?
Yes. Quantity take-offs, tender pricing, cost plans and bid preparation for contractors, subcontractors and developers, as a one-off or as ongoing back-office support.
Do you only price drylining?
No. Drylining take-offs and estimating are our specialism, but we cover all trades across residential and commercial projects.
What is the difference between a provisional sum and a fixed price?
A provisional sum is an allowance for work that cannot yet be priced accurately, usually because it is not designed or chosen. It will change when the work is defined. A cost plan names each one and what has to happen to fix it.
Can you help with JCT or NEC contracts?
Yes. We provide contract support on JCT and NEC forms, including recording and valuing variations and preparing valuations.
I am a homeowner. Is this the right service?
Usually the pre-purchase renovation cost plan or a priced scope for your project suits a homeowner better. Get in touch and we will point you to the right route.
Further reading before you start.
Provisional sums in renovation quotes
A practical guide from the Bayocorp Advice Hub.
Read the guide →How to compare building quotations properly
A practical guide from the Bayocorp Advice Hub.
Read the guide →What a refurbishment scope of works should contain
A practical guide from the Bayocorp Advice Hub.
Read the guide →Avoiding costly variations
A practical guide from the Bayocorp Advice Hub.
Read the guide →Other work this often goes with.
Pre-Purchase Cost Plan
A contractor-led renovation cost plan before you buy a London property.
Open page →Drylining
Specialist drylining contractor in London and the South East.
Open page →House Extensions
Single and double-storey rear, side return and wrap-around extensions in North London.
Open page →All Services
Every service Bayocorp offers, including refurbishments, maintenance and Higher-Risk Building small works.
See all services →Tell us about the property and what you want from it.
Send the details, a few photos or a floor plan, and we will tell you what the work involves and the right next step.
Based in Archway N19, working across London.
Bayocorp, Flat 22 Eddison Court, 253 Sussex Way, London N19 4DW · 02039 10 00 01 · info@bayocorp.uk · Federation of Master Builders member