- Companies
- Installers
- Witham
- Mason Construction (London) Ltd
Mason Construction (London) Ltd
- Company number
- 07430849
- Incorporated
- 5 Nov 201015 years trading
- Registered office
- 67 Newland Street, Witham, Essex, CM8 1AA
- Nature of business
- Other construction installation
Mason Construction (London) Ltd is a 15-year-old private limited company registered in Witham, company number 07430849, one of 20 installation companies (insulation, lifts, shutters and similar) in Witham. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 £168K (+25.4%) on the year before, to £830K.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £1.2M against £375K owed within a year: 3.1 times cover.
- 5 employees on average during the year.
- Balance sheets on record for 10 years, 2017 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £830K | £1.1M | £1.2M | £375K | 5 |
| 31 Mar 2025 | £662K | £490K | £837K | £210K | 5 |
| 31 Mar 2024 | £633K | £568K | £868K | £249K | 5 |
| 31 Mar 2023 | £716K | £653K | £1M | £304K | 5 |
| 31 Mar 2022 | £376K | £389K | £578K | £223K | 5 |
| 31 Mar 2021 | £125K | £181K | £295K | £172K | 5 |
| 31 Mar 2020 | £52K | £69K | £187K | £139K | 6 |
| 31 Mar 2019 | £38K | £18K | £121K | £87K | 5 |
| 31 Mar 2018 | £30K | £72K | £119K | £89K | 5 |
| 31 Mar 2017 | £1,765 | £19K | £67K | £65K | 5 |
Where Mason Construction (London) Ltd is registered
The registered office is in Witham (CM8), in the Braintree local authority area, East of England. Show CM8 1AA on a map.
Other trade companies in CM8
- Reivax Car Valeting LtdMechanics and garages
- CPH Contracting LtdInstallers
- Rhino Mechanical Services LtdPlumbers and heating engineers
- KM Core Systems LtdElectricians
- New Worlds Tech LtdRepair services
- Me Me Hire LtdSpecialist contractors
- RBK Access LtdScaffolders
- Pressure Wash LtdCleaning companies
Also registered at this address
18 other companies use the same registered office as Mason Construction (London) Ltd.
- Abbey Building Services & Maintenance LimitedSpecialist contractors
- City Pumps LtdSpecialist contractors
- CMD Ceilings LimitedJoiners and carpenters
- Corkerry LtdSpecialist contractors
- Jennings Engineering (UK) LtdMechanics and garages
- Kilnlake Properties LimitedProperty developers
- Las Installations LtdMachinery repair and installation
- London Lead Roofing LimitedRoofers
- Louis Kingwill LtdBuilders
- Maine Scaffolding Services LtdScaffolders
- Missy-Tank LimitedElectricians
- MPM Construction LtdProperty developers
- MT Build LtdProperty developers
- Payze Plastering LtdProperty developers
- Polytech Contracts LimitedSpecialist contractors
- Smith & Donovan LimitedPainters and decorators
- Sowman Plumbing and Heating LimitedPlumbers and heating engineers
- The Belvia Construction Company LtdBuilders
What happens if Mason Construction (London) 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 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 07430849
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 5 November 2010 (15 years ago)
- Registered office
- 67 Newland Street, Witham, Essex, CM8 1AA
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 5 November 2025
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in Witham
Other active installation companies (insulation, lifts, shutters and similar) registered in Witham.
- MBC Contracts Ltd.1993
- MGK Family Ltd2025
- Summit Essex Ltd2018
- Z-1 Drywall Ltd2021
- Adminex Technologies Ltd.2009
- Cain Carpentry Ltd2022
- Clearview Dymek Construction Limited2026
- Countrywide Conservatories UK Limited2003
All installation companies (insulation, lifts, shutters and similar) in Witham · All trades in Witham · Installers across the UK
Frequently asked questions
When are Mason Construction (London) Ltd's accounts due?
Mason Construction (London) Ltd's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Mason Construction (London) Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Mason Construction (London) Ltd still trading?
Mason Construction (London) 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 Mason Construction (London) Ltd do?
Mason Construction (London) Ltd is registered under Other construction installation (SIC 43290).
How old is Mason Construction (London) Ltd?
Mason Construction (London) Ltd was incorporated on 5 November 2010, 15 years ago.
What is the penalty if Mason Construction (London) 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 Mason Construction (London) 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.