- Company number
- 14687034
- Incorporated
- 24 Feb 20233 years trading
- Registered office
- 86-90 Paul Street, London, EC2A 4NE
- Nature of business
- Construction of commercial buildings; Construction of domestic buildings
Mar Contractors UK Limited is a 3-year-old private limited company registered in London, company number 14687034, one of 12,075 building contractors in London. Its next accounts are due at Companies House on 30 November 2027, and the CT600 for the period to 28 February 2027 is due at HMRC on 28 February 2028.
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 £107K (+197%) on the year before, to £161K.
- Current assets of £235K against £75K owed within a year: 3.1 times cover.
- 2 employees on average, up from 1 the year before.
- Balance sheets on record for 3 years, 2024 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Feb 2026 | £161K | £8,405 | £235K | £75K | 2 |
| 28 Feb 2025 | £54K | £90K | £232K | £178K | 1 |
| 29 Feb 2024 | £1,478 | £9,725 | £21K | £20K | 1 |
Where Mar Contractors UK Limited is registered
The registered office is in London (EC2A), in the Hackney local authority area, London. Show EC2A 4NE on a map.
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- Cenlora Cleaning Group LtdCleaning companies
Shared registered office
432 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 Mar Contractors UK 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 November 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2027 to 31 Dec 2027 | £150 |
| 1 to 3 months late | 1 Jan 2028 to 29 Feb 2028 | £375 |
| 3 to 6 months late | 1 Mar 2028 to 31 May 2028 | £750 |
| More than 6 months late | From 1 Jun 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 29 Feb 2028 | £200 |
| 3 months late | 28 May 2028 | another £200 |
| 6 months late | 28 Aug 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 14687034
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 24 February 2023 (3 years ago)
- Registered office
- 86-90 Paul Street, London, EC2A 4NE
- Nature of business
- Construction of commercial buildings (SIC 41201)
Construction of domestic buildings (SIC 41202) - Year end
- 28 February (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 28 February 2026
- Last confirmation statement
- 22 January 2026
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 in London
Other active building contractors registered in London.
- Mar Residential Solutions Ltd2014
- Mara & Partners Ltd2024
- Mara Building Limited2017
- Marbac Design Limited2025
- Marble and Stone Contracting Ltd2018
- Marbo Group Ltd2020
- Marbor Ltd2014
- Marc Builders Ltd2019
All building contractors in London · All trades in London · Builders across the UK
Frequently asked questions
When are Mar Contractors UK Limited's accounts due?
Mar Contractors UK Limited's next accounts are due at Companies House by 30 November 2027 (in 413 days), covering the period to 28 February 2027.
When is Mar Contractors UK Limited's CT600 due?
The CT600 for the period to 28 February 2027 is due at HMRC by 28 February 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2027.
Is Mar Contractors UK Limited still trading?
Mar Contractors UK 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 Mar Contractors UK Limited do?
Mar Contractors UK Limited is registered under Construction of commercial buildings (SIC 41201); Construction of domestic buildings (SIC 41202).
How old is Mar Contractors UK Limited?
Mar Contractors UK Limited was incorporated on 24 February 2023, 3 years ago.
What is the penalty if Mar Contractors UK 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 Mar Contractors UK 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.