Omnisum™

Know the whole number.

You have a builder’s quote in your hand. We read it, level every quote side by side, add the costs no one warned you about — and give you one honest total before you sign anything.

Upload my quote(s)I don’t have quotes yet

First Quick Check is free. No card needed.

Your project — the whole number
Builder’s quote (as written)£163,485
Costs the quote leaves out+£14,730
Finish materials — market floor+£18,900
The whole number£197,115
Illustrative figures from a sample London renovation.
How it works

Start with the quote in your hand

No forms first, no browsing builders. Drop in the quote you already have and the work begins immediately.

01

Upload a quote

PDF, spreadsheet or a photo. We read it on the spot — what it covers, what it’s silent on, what to ask.

02

Level them side by side

Add the other quotes as they arrive. We adjust for what each one includes and leaves out, so you compare like with like.

03

Only what your project needs

Permissions for your address, the right specialists — and just as important, the ones you probably don’t need, with the reason.

04

One honest total

The whole number, a rating for every quote, and the exact questions to ask each builder before you sign.

Completeness

Every cost, not just the builder

The costs that hurt are the ones nobody put in writing. We add them to your total before they add themselves.

Building controlApplications, inspections — and who pays.
Party wallNotices take up to two months. Start late and the job starts late.
SurveysAsbestos, drainage, structural — required, and often missing from cheap quotes.
Finish materialsA second budget on top of the build. We price the market floor per room.
Provisional sumsPlaceholder numbers that move. We show how much of the price is soft.
The likely upliftWhat projects like yours really cost by the end — planned, not a surprise.
Independence

No referral fees. No favourites.

We don’t sell leads, take commissions, or recommend builders for money. Omnisum is paid by you — never by the people quoting you. That’s the only way the analysis can be honest.

  • Builders can’t pay to be listed, ranked or promoted
  • Suppliers can’t pay to appear in your materials list
  • Every check is a question a good builder answers happily
  • If someone else in your project is taking a referral fee, we flag it
The Deep Analysis

What £79 buys before you sign a £150,000 contract

  • Every quote read line by line — inclusions, exclusions, contradictions, expired validity
  • Quotes levelled like-for-like, so the cheapest on paper stops hiding
  • The builders checked: Companies House, accreditations, reviews, insurance — strengths first, flags as questions
  • Technical questions from real trade practice, in plain English
  • Permissions checked for your address: planning, building regs, party wall, conservation
  • The likely final cost, not just the quoted one
  • Ten questions for every builder — with what’s already answered marked
  • The Omnisum Rating for every quote — and it updates as builders respond
Pricing
£79
per project analysis, inc. VAT
Your first Quick Check is free — see the value before you pay a penny.
For comparison: a single-quote human review elsewhere costs £99 and takes two working days. Omnisum analyses all your quotes, and it’s ready in minutes.
Check my quote
No quotes yet? · coming soon

Start before the builders do

Most people tender their biggest purchase with a two-line email. Answer our questions about your project and Omnisum prepares your scope of work — a proper tender document, ready to send — so every builder prices the same job, and the quotes that come back can actually be compared.

Your tender documentThe scope of work, room by room — what’s included, what isn’t, what to price as options.
Who your project needsMain contractor, structural engineer, party wall surveyor, asbestos surveyor, CCTV drainage, architect, interior designer, building control — only the ones YOUR project actually needs, and the ones it probably doesn’t.
How to find themWe never recommend or sell you anyone — no referral fees, remember. Instead we explain the process: how to search well, asking friends and family, local community groups, and exactly what to look for when you shortlist.

Then, when the quotes come back, bring them here — one £79 fee covers your tender document and the analysis of up to three quotes.

Join the waitlist for this
For builders

Not afraid of Omnisum?

Good builders want informed clients. Join the founding cohort: put your quotes through the same check your customers use, fix what it finds, and carry the Omnisum Transparent Builder mark. Earned, never bought.

Join as a builder
Early access

Be first to know the whole number

Omnisum is launching soon. Leave your email and you’ll get early access — and your first Deep Analysis at the founding price.

No spam, no sharing your address — that would be against everything above. See our privacy notice.