- Companies
- Specialist contractors
- London
- Acuo Si Ltd.
Acuo Si Ltd.
- Company number
- 16999342
- Incorporated
- 29 Jan 2026
- Registered office
- 11-12 Old Bond Street, London, W1S 4PN
- Nature of business
- Other specialised construction activities n.e.c.; Engineering related scientific and technical consulting activities
Acuo Si Ltd. is a newly incorporated private limited company registered in London, company number 16999342, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 29 October 2027, and its first CT600 is due at HMRC on 28 January 2028.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where Acuo Si Ltd. is registered
The registered office is in London (W1S), in the Westminster local authority area, London. Show W1S 4PN on a map.
Other trade companies in W1S
- Alderborne LimitedSpecialist contractors
- Gtstore LtdMotor traders
- Imperial Roofcraft LtdRoofers
- Service Robots Group LtdFacilities management
- Bluerock Infrastructure LtdBuilders
- Kaivaro Projects LtdBuilders
- Solar Property 45 LtdProperty developers
- Crown Crest Roofing and Building Solutions LtdRoofers
Also registered at this address
6 other companies use the same registered office as Acuo Si Ltd..
- Atog Development LtdProperty developers
- Elite Jobs LtdFinishing trades
- Puremon Development Partners LtdProperty developers
- Rosco & Perlini LtdProperty developers
- Smart Builders Construct LtdBuilders
- The Klean Team LimitedCleaning companies
What happens if Acuo Si Ltd. files late
Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 29 October 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 30 Oct 2027 to 29 Nov 2027 | £150 |
| 1 to 3 months late | 30 Nov 2027 to 29 Jan 2028 | £375 |
| 3 to 6 months late | 30 Jan 2028 to 29 Apr 2028 | £750 |
| More than 6 months late | From 30 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2028 | £200 |
| 3 months late | 30 Apr 2028 | another £200 |
| 6 months late | 31 Jul 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 2029 | another 10% of any unpaid tax |
For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.
Company details
As held on the Companies House register.
- Company number
- 16999342
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 January 2026
- Registered office
- 11-12 Old Bond Street, London, W1S 4PN
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
Engineering related scientific and technical consulting activities (SIC 71122) - Year end
- 31 January (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in London
Other active specialist construction companies registered in London.
- Acute Energy Ltd2020
- Acute Services (UK) Ltd2015
- Ad BM UK Ltd2020
- Ad Development Solution Ltd2026
- Ad Safe Ltd2026
- Ada Gas Ltd2026
- Adaptive Energy Solutions Ltd2018
- Addisen Ltd2022
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are Acuo Si Ltd.'s accounts due?
Acuo Si Ltd.'s next accounts are due at Companies House by 29 October 2027 (in 381 days), covering the period to 31 January 2027.
When is Acuo Si Ltd.'s CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 28 January 2027, due by 28 January 2028, and one for the period to 31 January 2027, due by 31 January 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Acuo Si Ltd. still trading?
Acuo Si Ltd. is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.
What does Acuo Si Ltd. do?
Acuo Si Ltd. is registered under Other specialised construction activities n.e.c. (SIC 43999); Engineering related scientific and technical consulting activities (SIC 71122).
How old is Acuo Si Ltd.?
Acuo Si Ltd. was incorporated on 29 January 2026, less than a year ago.
What is the penalty if Acuo Si Ltd. files its accounts late?
Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.
Official records
View Acuo Si Ltd. on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.