Principal Designer Registers
The Principal Designer Registers carries 3 published figures read from 2 sources' own pages, from 100 to 360 GBP, read 28 October 2026.
2 of the 4 named sources read in full publish a figure; 2 publish none, read 28 October 2026.
By register
| Breakdown | Median | Range | Sources |
|---|---|---|---|
| registerRIBA domestic application | 360GBP | 360 to 360GBP | 1 |
| registerRIBA domestic annual | 120GBP | 120 to 120GBP | 1 |
| registerACA annual registration | 100GBP | 100 to 100GBP | 1 |
Every figure, with its source
One row per published figure: the figure as the source's own page publishes it, the page, and the day it was read. A figure that is not on a page we read is not on this one.
| Source | Figure | Breakdown | Read |
|---|---|---|---|
| RIBA Principal Designer Register: join (2026 fees) | 360GBP + VAT | RIBA domestic application | 2026-10-28 |
| RIBA Principal Designer Register: join (2026 fees) | 120GBP + VAT | RIBA domestic annual | 2026-10-28 |
| ACA principaldesigner.uk register | 100GBP | ACA annual registration | 2026-10-28 |
The sentence each figure was read from (3)
- RIBA Principal Designer Register: join (2026 fees), read 2026-10-28:
application fee is £360 + VAT
- RIBA Principal Designer Register: join (2026 fees), read 2026-10-28:
annual subscription fee is £120 + VAT
- ACA principaldesigner.uk register, read 2026-10-28:
Quick and easy registration for £100 + per year; no joining fee
Read in full, publishes no figure
2 named sources were read in full on the dates shown and print no usable figure. They are counted, never filled in.
- RIBA Principal Designer Register: search, read 2026-10-28: read in full and no accepted figure on the page
- CIAT: principal designer registers, read 2026-10-28: read in full and no accepted figure on the page
Methodology
Every row is a verbatim sentence read from the named source's own page through our fetch service on the date shown, hash-pinned to the stored read (the sha of the page's visible text; the raw page is mirrored to R2).
2 of the 4 named sources that could be read published a usable figure; 2 published none and are recorded as not published, never filled in; 1 could not be read (blocked, dead or unreachable) and count nowhere.
The headline figures (median, minimum, maximum, quartiles) are over ONE figure per source for each breakdown it prices, in GBP (a source's median where its page yielded several accepted sentences for one breakdown), so a page that gives figures for several breakdowns gives one for each and N counts 3 figures, never sentences; 3 candidate sentence(s) were refused by a reviewer with the reason recorded.
The fuller derivation this dataset is chartered to grow into (not yet what the figures above are; they are each source's own published figure as read): one row per register (body, who may join, domestic or full category, joining and annual fee, whether it is searchable) and the count of registrants each publishes
3 candidate sentences on these pages were refused by a reviewer; each refusal and its reason is recorded in the review ledger.
Sources (5)
- RIBA Principal Designer Register: search(the publisher's own terms; quoted for reporting and comment)
- RIBA Principal Designer Register: join (2026 fees)(the publisher's own terms; quoted for reporting and comment)
- ACA principaldesigner.uk register(the publisher's own terms; quoted for reporting and comment)
- CIAT: principal designer registers(the publisher's own terms; quoted for reporting and comment)
- APS: Principal Designer Building Regulations register(the publisher's own terms; quoted for reporting and comment)
Cite or embed this figure
The Principal Designer Registers carries 3 published figures read from 2 sources' own pages, from 100 to 360 GBP, read 28 October 2026.
2 of the 4 named sources read in full publish a figure; 2 publish none, read 28 October 2026.
Principal Designer Registers, register RIBA domestic application: median 360 GBP across 1 source, read 28 October 2026.
Principal Designer Registers, register RIBA domestic annual: median 120 GBP across 1 source, read 28 October 2026.
Principal Designer Registers, register ACA annual registration: median 100 GBP across 1 source, read 28 October 2026.
Cite as: "principaldesignercost.co.uk Principal Designer Registers", updated 2026-10-28, https://principaldesignercost.co.uk/datasets/principal-designer-registers/.
Download the CSV (3 rows, computed 2026-10-28)