- Companies
- Specialist contractors
- London
- Riordan Construction Ltd
Riordan Construction Ltd
- Company number
- 09715316
- Incorporated
- 3 Aug 201511 years trading
- Registered office
- 5 Avocet Court, 37 Harrier Road, London, NW9 5BZ
- Nature of business
- Other specialised construction activities n.e.c.; Management consultancy activities other than financial management; Other engineering activities
Riordan Construction Ltd is a 11-year-old private limited company registered in London, company number 09715316, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets up £1,103 (+2.3%) on the year before, to £49K.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £24K against £25K owed within a year: 1.0 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | £49K | £19K | £24K | £25K | 2 |
| 31 Aug 2024 | £48K | £41K | £44K | £3,205 | 2 |
| 31 Aug 2023 | £42K | £26K | £57K | £16K | 3 |
| 31 Aug 2022 | £42K | £26K | £57K | £16K | 3 |
| 31 Aug 2021 | £53K | £49K | £77K | £27K | 3 |
| 31 Aug 2020 | £18K | £29K | £16K | 3 | |
| 31 Aug 2019 | £10K | £15K | £13K | 3 | |
| 31 Aug 2018 | £16K | £19K | £8,986 | ||
| 31 Aug 2017 | £8,116 | £26K | £20K | ||
| 31 Aug 2016 | £5,033 | £6,959 | £11K | £8,218 |
Where Riordan Construction Ltd is registered
The registered office is in London (NW9), in the Barnet local authority area, London. Show NW9 5BZ on a map.
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What happens if Riordan Construction 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 31 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 2028 | 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
- 09715316
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 3 August 2015 (11 years ago)
- Registered office
- 5 Avocet Court, 37 Harrier Road, London, NW9 5BZ
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
Management consultancy activities other than financial management (SIC 70229)
Other engineering activities (SIC 71129) - Year end
- 31 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 2 August 2025
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.
- Rite Construction Limited2026
- Rivendell Builders Ltd2024
- Rivera Albert Limited2022
- Rivera Limited2017
- Riverfront Property Services Ltd2022
- RK Support Services Limited2022
- RKR Engineering Ltd2015
- RL Environmental Builders Ltd2017
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are Riordan Construction Ltd's accounts due?
Riordan Construction Ltd's next accounts are due at Companies House by 31 May 2027 (in 230 days), covering the period to 31 August 2026.
When is Riordan Construction Ltd's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is Riordan Construction Ltd still trading?
Riordan Construction Ltd is listed as active on the Companies House register (checked 13 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 Riordan Construction Ltd do?
Riordan Construction Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999); Management consultancy activities other than financial management (SIC 70229); Other engineering activities (SIC 71129).
How old is Riordan Construction Ltd?
Riordan Construction Ltd was incorporated on 3 August 2015, 11 years ago.
What is the penalty if Riordan Construction 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 Riordan Construction Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.