About Principal designer
Joseph Ellul (5 Dolce Vita Corte, Triq San Mikiel, San Gwann, SGN 2303, Malta). We run this site and pass each enquiry to CDM consultants covering the enquirer's area.
Why this site exists
We read 29 providers' own pages on 28 October 2026 and only 2 of them print a figure, so the only way to see the spread is to read all of them and show the working. That is what this site is: one table, every source named, dated.
Who it is for
Anyone about to buy this service who wants to know what it costs before they ask, and who would rather see the published prices than a range somebody made up.
What is on this site
One question, "principal designer", answered with a quote form that works on the page with no account, 5 guides on the questions around it, a data table you can cite (the figures and their method), and the sources every figure rests on.
- Principal Designer Fee Index: every published figure: Every provider we read that publishes a figure for principal designer, what it publishes, and the day we read it. 6 of 29 read.
- Who publishes a price, and who makes you ask: 2 of 29 providers read for principal designer publish a figure. These are the ones that do not.
- Principal designer cost: what UK CDM firms publish in 2026: Principal designer cost in the UK: published fees run from £750 plus VAT for a home extension to £2,100 plus VAT, read off the firms' own pages.
- Principal designer fees: what the fee covers and how it is quoted: Principal designer fees explained: the pre-construction fee, the construction phase and health and safety file, bundled fees, and what to ask a CDM firm.
- CDM principal designer: when you must appoint one: When CDM 2015 makes you appoint a principal designer, what happens on a domestic project if you do not, and the separate Building Regulations role in England.
What it does not do
- No ranking, no best-of list and no scores: the table is sorted by the figure, not by us.
- No paid placement, no affiliate links and no sponsored rows.
- No invented figure: a provider that publishes nothing is listed as publishing nothing.
Who answers for it
Joseph Ellul-Turner, the person who runs this site.
Reach us
Contact for a question about the site, or enquiries@principaldesignercost.co.uk. The legal terms are on Terms and Privacy.
Principal designer is a free introduction service operated by Joseph Ellul (5 Dolce Vita Corte, Triq San Mikiel, San Gwann, SGN 2303, Malta). We pass your details to CDM consultants covering your area, who quote you directly; we may receive a fee from them, and you pay nothing and are under no obligation. We do not do the work ourselves. It carries no advertising, no sponsored placement and no affiliate links, and no provider in the table has paid to be there or can pay to be removed. Every figure is read from the named provider's own public page on the date shown and is what that provider advertises, not a quote for your job. Prices move; check the source before you rely on a row.