Allen Mason & Sons (Herrington) Limited
- Company number
- 01114982
- Incorporated
- 22 May 197353 years trading
- Registered office
- 23 Archery Rise, Durham City, Durham, DH1 4LA
- Nature of business
- Construction of domestic buildings; Other letting and operating of own or leased real estate
Allen Mason & Sons (Herrington) Limited is a 53-year-old private limited company registered in Durham City, company number 01114982, one of the UK's building contractors. Its next accounts are due at Companies House on 29 February 2028, and the CT600 for the period to 31 May 2027 is due at HMRC on 31 May 2028.
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 Allen Mason & Sons (Herrington) 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 up £136K (+2.4%) on the year before, to £5.7M.
- Net assets rose in 5 of 5 year-on-year comparisons on record.
- Current assets of £1.1M against £130K owed within a year: 8.5 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 7 years, 2014 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2026 | £5.7M | £1.1M | £1.1M | £130K | 0 |
| 31 May 2025 | £5.6M | £964K | £968K | £125K | 0 |
| 31 May 2024 | £5.4M | £820K | £824K | £121K | 1 |
| 31 May 2023 | £5.3M | £662K | £667K | £116K | 1 |
| 31 May 2016 | £2.4M | £1.2M | £2.9M | £58K | |
| 31 May 2015 | £2.3M | £1.3M | £2.8M | £83K | |
| 31 May 2014 | £2.1M | £977K | £2.6M | £119K |
Who runs and owns Allen Mason & Sons (Herrington) Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (2)
| Name | Role | Appointed |
|---|---|---|
| A*** M*** | Director | before Aug 1991 |
| A*** M*** | Secretary | Nov 2008 |
3 former officers
| Name | Role | Appointed | Left |
|---|---|---|---|
| G*** M*** | Secretary | Nov 2008 | |
| G*** M*** | Director | Nov 2008 | |
| S*** M*** | Director | Dec 2009 |
Person with significant control
Charges (secured borrowing)
3 of 3 registered charges are outstanding. A charge is security a lender takes over a company's assets, typically for a loan, mortgage or asset finance.
| Lender | Status | Registered |
|---|---|---|
| Skipton Building Society | Outstanding | Feb 2004 |
| Skipton Building Society | Outstanding | Feb 2004 |
| Skipton Building Society | Outstanding | Nov 2003 |
Where Allen Mason & Sons (Herrington) Limited is registered
The registered office is in Durham City (DH1), in the County Durham local authority area, North East. Show DH1 4LA on a map.
Other trade companies in DH1
- Drives & Patios 4 You LtdLandscapers and gardeners
- Hanser LimitedBuilders
- McCluskey Roofing North East LtdRoofers
- Phone and Laptop Repairs Ne LtdRepair services
- Tyne & Wear Commercial Cleaning LtdCleaning companies
- HZG Projects LimitedCivil engineering
- Damiora Group LtdFacilities management
- James Lawton Homes ( Whickham Farm ) LtdProperty developers
What happens if Allen Mason & Sons (Herrington) 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 29 February 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2028 to 31 Mar 2028 | £150 |
| 1 to 3 months late | 1 Apr 2028 to 31 May 2028 | £375 |
| 3 to 6 months late | 1 Jun 2028 to 31 Aug 2028 | £750 |
| More than 6 months late | From 1 Sep 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2028 | £200 |
| 3 months late | 31 Aug 2028 | another £200 |
| 6 months late | 30 Nov 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 01114982
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 May 1973 (53 years ago)
- Registered office
- 23 Archery Rise, Durham City, Durham, DH1 4LA
- Nature of business
- Construction of domestic buildings (SIC 41202)
Other letting and operating of own or leased real estate (SIC 68209) - Year end
- 31 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2026
- Last confirmation statement
- 10 August 2026
- Charges (mortgages)
- 3 outstanding of 3 registered
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies
Other active building contractors.
Frequently asked questions
When are Allen Mason & Sons (Herrington) Limited's accounts due?
Allen Mason & Sons (Herrington) Limited's next accounts are due at Companies House by 29 February 2028 (in 504 days), covering the period to 31 May 2027.
When is Allen Mason & Sons (Herrington) Limited's CT600 due?
The CT600 for the period to 31 May 2027 is due at HMRC by 31 May 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2028.
Is Allen Mason & Sons (Herrington) Limited still trading?
Allen Mason & Sons (Herrington) Limited 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 Allen Mason & Sons (Herrington) Limited do?
Allen Mason & Sons (Herrington) Limited is registered under Construction of domestic buildings (SIC 41202); Other letting and operating of own or leased real estate (SIC 68209).
How old is Allen Mason & Sons (Herrington) Limited?
Allen Mason & Sons (Herrington) Limited was incorporated on 22 May 1973, 53 years ago.
Who runs Allen Mason & Sons (Herrington) Limited?
Allen Mason & Sons (Herrington) Limited has 1 active director. Their names and service addresses are on the Companies House register.
Who owns Allen Mason & Sons (Herrington) Limited?
One person or company has significant control of Allen Mason & Sons (Herrington) Limited: an individual (owns 75% or more of the shares).
What is the penalty if Allen Mason & Sons (Herrington) 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 Allen Mason & Sons (Herrington) Limited 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.