- Companies
- Civil engineering
- London
- R Walsh & Sons Ltd
R Walsh & Sons Ltd
- Company number
- 11729556
- Incorporated
- 17 Dec 20187 years trading
- Registered office
- 161 Forest Road, London, E17 6HE
- Nature of business
- Construction of other civil engineering projects n.e.c.; Other building completion and finishing
R Walsh & Sons Ltd is a 7-year-old private limited company registered in London, company number 11729556, one of 1,853 civil engineering contractors in London. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 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 down £22K (-49.6%) on the year before, to £22K.
- Net assets rose in 2 of 6 year-on-year comparisons on record.
- Current assets of £26K against £7,072 owed within a year: 3.6 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 7 years, 2019 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £22K | £26K | £7,072 | 1 | |
| 31 Dec 2024 | £43K | £85K | £41K | 1 | |
| 31 Dec 2023 | £49K | £125K | £67K | 1 | |
| 31 Dec 2022 | -£7,401 | £13K | £47K | £38K | 1 |
| 31 Dec 2021 | -£5,639 | £4,147 | £22K | £8,156 | 1 |
| 31 Dec 2020 | £8,764 | £61K | £28K | 1 | |
| 31 Dec 2019 | £3,891 | £5,746 | £18K | 1 |
Where R Walsh & Sons Ltd is registered
The registered office is in London (E17), in the Waltham Forest local authority area, London. Show E17 6HE on a map.
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Shared registered office
70 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if R Walsh & Sons 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 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 11729556
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 17 December 2018 (7 years ago)
- Registered office
- 161 Forest Road, London, E17 6HE
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
Other building completion and finishing (SIC 43390) - Year end
- 31 December (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 16 December 2025
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in London
Other active civil engineering contractors registered in London.
- R&M Civils & Drainage Ltd2026
- R.A Resourcing Solution’S Ltd2026
- Ra Infrastructure Limited2026
- Race to Net Zero Limited2024
- Radcliffe Court Limited1984
- Radon86 Ltd2021
- Rail Infrastructure Management Ltd2015
- Rail Resources Ltd2022
All civil engineering contractors in London · All trades in London · Civil engineering across the UK
Frequently asked questions
When are R Walsh & Sons Ltd's accounts due?
R Walsh & Sons Ltd's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is R Walsh & Sons Ltd's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is R Walsh & Sons Ltd still trading?
R Walsh & Sons 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 R Walsh & Sons Ltd do?
R Walsh & Sons Ltd is registered under Construction of other civil engineering projects n.e.c. (SIC 42990); Other building completion and finishing (SIC 43390).
How old is R Walsh & Sons Ltd?
R Walsh & Sons Ltd was incorporated on 17 December 2018, 7 years ago.
What is the penalty if R Walsh & Sons 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 R Walsh & Sons 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.