- Companies
- Civil engineering
- Colindale
- Nicolas Mask Limited
Nicolas Mask Limited
- Company number
- 11137542
- Incorporated
- 8 Jan 20188 years trading
- Registered office
- 199A Edgware Road, Colindale, London, NW9 6LP
- Nature of business
- Construction of roads and motorways; Construction of railways and underground railways; Construction of utility projects for electricity and telecommunications; Other cleaning services
Nicolas Mask Limited is a 8-year-old private limited company registered in Colindale, company number 11137542, one of the UK's civil engineering contractors. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 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 £39K (-178.5%) on the year before, to -£17K.
- Net assets rose in 5 of 6 year-on-year comparisons on record.
- Current assets of £88 against £11K owed within a year: 0.0 times cover.
- 2 employees on average, down from 7 the year before.
- 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 Jan 2025 | -£17K | £88 | £11K | 2 | |
| 31 Jan 2024 | £22K | £157 | 7 | ||
| 31 Jan 2023 | £12K | £1,337 | 0 | ||
| 31 Jan 2022 | £9,240 | £7,516 | £0 | 4 | |
| 31 Jan 2021 | £6,735 | £26K | £150 | 5 | |
| 31 Jan 2020 | £5,703 | £7,158 | £1,455 | 1 | |
| 31 Jan 2019 | -£504 | £2,980 | £3,484 |
Where Nicolas Mask Limited is registered
The registered office is in Colindale (NW9), in the Brent local authority area, London. Show NW9 6LP on a map.
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What happens if Nicolas Mask 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 31 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 11137542
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 8 January 2018 (8 years ago)
- Registered office
- 199A Edgware Road, Colindale, London, NW9 6LP
- Nature of business
- Construction of roads and motorways (SIC 42110)
Construction of railways and underground railways (SIC 42120)
Construction of utility projects for electricity and telecommunications (SIC 42220)
Other cleaning services (SIC 81299) - Year end
- 31 January (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 12 September 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 Colindale
Other active civil engineering contractors registered in Colindale.
- PW Steel Erecting Ltd2018
- Adg Teesside Limited2018
- Rly Construction Ltd2018
- Muldowney Civils & Utilities Ltd2018
- Quantrum Civils Ltd2018
- Cosovan Utilities Ltd2018
- I Emi Limited2018
- Elite Groundworks Ltd2018
All civil engineering contractors in Colindale · All trades in Colindale · Civil engineering across the UK
Frequently asked questions
When are Nicolas Mask Limited's accounts due?
Nicolas Mask Limited's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is Nicolas Mask Limited's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is Nicolas Mask Limited still trading?
Nicolas Mask 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 Nicolas Mask Limited do?
Nicolas Mask Limited is registered under Construction of roads and motorways (SIC 42110); Construction of railways and underground railways (SIC 42120); Construction of utility projects for electricity and telecommunications (SIC 42220); Other cleaning services (SIC 81299).
How old is Nicolas Mask Limited?
Nicolas Mask Limited was incorporated on 8 January 2018, 8 years ago.
What is the penalty if Nicolas Mask 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 Nicolas Mask 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.