- Company number
- 16787251
- Incorporated
- 15 Oct 2025
- Registered office
- Flat 2 Hesham Court, 39 Clarence Parade, Southsea, PO5 2FA
- Nature of business
- Construction of domestic buildings; Other construction installation; Other specialised construction activities n.e.c.
Mars Construct Ltd is a newly incorporated private limited company registered in Southsea, company number 16787251, one of 53 building contractors in Southsea. Its next accounts are due at Companies House on 15 July 2027, and its first CT600 is due at HMRC on 14 October 2027.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Public contracts won
Mars Construct Ltd has one public sector contract award on record; the ones with their own published value total £87K (2019). Source: Contracts Finder and Find a Tender award notices. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Leeds City Council | PMP2019 Greenhill Primary School Roofing Phase 2 | £87K | 4 Jul 2019 |
Where Mars Construct Ltd is registered
The registered office is in Southsea (PO5), in the Portsmouth local authority area, South East. Show PO5 2FA on a map.
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- Baynes Wipers LtdMachinery repair and installation
What happens if Mars Construct 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 15 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 16 Jul 2027 to 15 Aug 2027 | £150 |
| 1 to 3 months late | 16 Aug 2027 to 15 Oct 2027 | £375 |
| 3 to 6 months late | 16 Oct 2027 to 15 Jan 2028 | £750 |
| More than 6 months late | From 16 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 16787251
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 15 October 2025
- Registered office
- Flat 2 Hesham Court, 39 Clarence Parade, Southsea, PO5 2FA
- Nature of business
- Construction of domestic buildings (SIC 41202)
Other construction installation (SIC 43290)
Other specialised construction activities n.e.c. (SIC 43999) - Year end
- 31 October (accounting reference date)
- Accounts type
- No accounts filed yet
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 Southsea
Other active building contractors registered in Southsea.
- MC13 Ltd2020
- Nationalpm Ltd2026
- Osd Interior Limited2019
- Ot Services Property Ltd2023
- P H Brickwork Ltd2007
- Paul Moreton Building Services Ltd2025
- Pia Brickwork Solutions Ltd2025
- Prem Build Ltd2024
All building contractors in Southsea · All trades in Southsea · Builders across the UK
Frequently asked questions
When are Mars Construct Ltd's accounts due?
Mars Construct Ltd's next accounts are due at Companies House by 15 July 2027 (in 275 days), covering the period to 31 October 2026.
When is Mars Construct Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 14 October 2026, due by 14 October 2027, and one for the period to 31 October 2026, due by 31 October 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Mars Construct Ltd still trading?
Mars Construct 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 Mars Construct Ltd do?
Mars Construct Ltd is registered under Construction of domestic buildings (SIC 41202); Other construction installation (SIC 43290); Other specialised construction activities n.e.c. (SIC 43999).
How old is Mars Construct Ltd?
Mars Construct Ltd was incorporated on 15 October 2025, less than a year ago.
Has Mars Construct Ltd won public sector contracts?
Yes. Mars Construct Ltd has one contract award from public bodies on Contracts Finder and Find a Tender (those with their own published value total £87K), most recently from Leeds City Council.
What is the penalty if Mars Construct 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 Mars Construct 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.