- Companies
- Specialist contractors
- John Alderson & Son Limited
John Alderson & Son Limited
- Company number
- 01423309
- Incorporated
- 25 May 197947 years trading
- Registered office
- Unit 1 Foundry Industrial Estate, Richardshaw Lane, Stanningley, Pudsey, LS28 6BN
- Nature of business
- Other specialised construction activities n.e.c.
John Alderson & Son Limited is a 47-year-old private limited company registered in Stanningley, company number 01423309, one of the UK's specialist construction companies. 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.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for John Alderson & Son LimitedOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £192K (-13.7%) on the year before, to £1.2M.
- Net assets rose in 3 of 8 year-on-year comparisons on record.
- Current assets of £180K against £469K owed within a year: 0.4 times cover.
- 10 employees on average, down from 12 the year before.
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £1.2M | £2 | £180K | £469K | 10 |
| 31 Dec 2024 | £1.4M | £12 | £166K | £427K | 12 |
| 31 Dec 2023 | £1.4M | £31K | £312K | £405K | 13 |
| 30 Dec 2022 | £1.2M | £15K | £215K | £394K | 12 |
| 30 Dec 2021 | £758K | £103K | £313K | £491K | 24 |
| 30 Dec 2020 | £1.2M | £200K | £542K | £406K | 24 |
| 30 Dec 2019 | £1.4M | £214K | £588K | £212K | 19 |
| 30 Dec 2018 | £1.5M | £124K | £442K | £230K | 20 |
| 31 Dec 2017 | £1.7M | £224K | £600K | £221K | 23 |
Where John Alderson & Son Limited is registered
The registered office is in Stanningley (LS28), in the Leeds local authority area, Yorkshire and The Humber. Show LS28 6BN on a map.
Other trade companies in LS28
- Multi-Fix Yorkshire LtdBuilders
- West Yorkshire Plastering Contractors LimitedPlasterers
- Lux & Layout LimitedBuilders
- Dunnachie Boatworks LtdMachinery repair and installation
- E&G Eco Solutions LimitedBuilders
- TP Automotive Care LtdMechanics and garages
- S M Group Wy LtdMotor traders
- Emmerson Property Services LtdCleaning companies
What happens if John Alderson & Son Limited 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
- 01423309
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 May 1979 (47 years ago)
- Registered office
- Unit 1 Foundry Industrial Estate, Richardshaw Lane, Stanningley, Pudsey, LS28 6BN
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 28 September 2026
- Charges (mortgages)
- 1 outstanding of 1 registered
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
Other active specialist construction companies.
Frequently asked questions
When are John Alderson & Son Limited's accounts due?
John Alderson & Son Limited's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is John Alderson & Son Limited'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 John Alderson & Son Limited still trading?
John Alderson & Son Limited 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 John Alderson & Son Limited do?
John Alderson & Son Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is John Alderson & Son Limited?
John Alderson & Son Limited was incorporated on 25 May 1979, 47 years ago.
What is the penalty if John Alderson & Son Limited 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 John Alderson & Son Limited 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.