- Companies
- Property developers
- Southampton
- Topmarx Limited
Topmarx Limited
- Company number
- 03207600
- Incorporated
- 4 Jun 199630 years trading
- Registered office
- Chardan House Culverlands, Winchester Road, Shedfield, Southampton, Hampshire, SO32 2JF
- Nature of business
- Development of building projects; Construction of domestic buildings
Topmarx Limited is a 30-year-old private limited company registered in Southampton, company number 03207600, one of 399 property development companies in Southampton. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 30 December 2026 is due at HMRC on 30 December 2027.
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 Topmarx 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 £222K (+15.4%) on the year before, to £1.7M.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £3.1M against £1.5M owed within a year: 2.1 times cover.
- 52 employees on average, down from 55 the year before.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £1.7M | £148K | £3.1M | £1.5M | 52 |
| 31 Dec 2024 | £1.4M | £297K | £3.4M | £2M | 55 |
| 31 Dec 2023 | £1.2M | £160K | £3.3M | £2.1M | 57 |
| 31 Dec 2022 | £975K | £55K | £3M | £1.9M | 60 |
| 31 Dec 2021 | £1.4M | £1,523 | £3.5M | £2M | 59 |
| 31 Dec 2020 | £1.5M | £12K | £3.2M | £1.6M | 70 |
| 31 Dec 2019 | £1.6M | £1,523 | £3.4M | £2M | 77 |
| 31 Dec 2018 | £1.9M | £117K | £3.5M | £1.7M | 78 |
| 31 Dec 2017 | £1.9M | £183K | £3.6M | £1.8M | 80 |
| 31 Dec 2016 | £1.6M | £338K | £3.4M | £1.9M | 75 |
Public contracts won
Topmarx Limited has one public sector contract award on record (2017). Source: Contracts Finder and Find a Tender award notices. For all of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Hampshire County Council | Hampshire's Building Minor Works Framework - AWARD | Ceiling, not shown | 1 Aug 2017 |
Where Topmarx Limited is registered
The registered office is in Southampton (SO32), in the Winchester local authority area, South East. Show SO32 2JF on a map.
Other trade companies in SO32
- J. Green Plastering LtdPlasterers
- D&A Groom LtdInstallers
- Clearline Builds LtdBuilders
- Bumpers to Boost Customs LimitedMotor traders
- Chambers Composites LtdSpecialist contractors
- Gilltown Developments LimitedProperty developers
- Woodpabst Developments LimitedProperty developers
- Htwagroup LtdProperty developers
What happens if Topmarx 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 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 31 Dec 2027 | £200 |
| 3 months late | 30 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Dec 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
- 03207600
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 June 1996 (30 years ago)
- Registered office
- Chardan House Culverlands, Winchester Road, Shedfield, Southampton, Hampshire, SO32 2JF
- Nature of business
- Development of building projects (SIC 41100)
Construction of domestic buildings (SIC 41202) - Year end
- 30 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 25 April 2026
- Charges (mortgages)
- 1 outstanding of 5 registered
Filing notes for property development companies
Many property development companies are single-project vehicles. Stock of land and buildings sits on the balance sheet as work in progress until sale, and a company that has finished its project may become dormant rather than close.
Similar companies in Southampton
Other active property development companies registered in Southampton.
- TPM Building & Property Maintenance Limited2014
- Trusk Civil Engineering Limited2002
- U Developments Ltd2017
- Ud Invest Limited2019
- Ugaine Developments Group Limited2025
- Unify Property Limited2025
- Universal Platform Ltd2026
- Valmora Projects Ltd2026
All property development companies in Southampton · All trades in Southampton · Property developers across the UK
Frequently asked questions
When are Topmarx Limited's accounts due?
Topmarx Limited's next accounts are due at Companies House by 30 September 2027 (in 353 days), covering the period to 30 December 2026.
When is Topmarx Limited's CT600 due?
The CT600 for the period to 30 December 2026 is due at HMRC by 30 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is Topmarx Limited still trading?
Topmarx 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 Topmarx Limited do?
Topmarx Limited is registered under Development of building projects (SIC 41100); Construction of domestic buildings (SIC 41202).
How old is Topmarx Limited?
Topmarx Limited was incorporated on 4 June 1996, 30 years ago.
Has Topmarx Limited won public sector contracts?
Yes. Topmarx Limited has one contract award from public bodies on Contracts Finder and Find a Tender, most recently from Hampshire County Council.
What is the penalty if Topmarx 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 Topmarx 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.