- Companies
- Civil engineering
- Haywards Heath
- Marten Developments (Sussex) Limited
Marten Developments (Sussex) Limited
- Company number
- 01538879
- Incorporated
- 15 Jan 198145 years trading
- Registered office
- 3RD Floor, 21 Perrymount Road, Haywards Heath, RH16 3TP
- Nature of business
- Construction of other civil engineering projects n.e.c.
Marten Developments (Sussex) Limited is a 45-year-old private limited company registered in Haywards Heath, company number 01538879, one of 12 civil engineering contractors in Haywards Heath. 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.
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 Marten Developments (Sussex) 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 £144K (+4.6%) on the year before, to £3.3M.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £1.6M against £1M owed within a year: 1.6 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- 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 | £3.3M | £8,108 | £1.6M | £1M | 0 |
| 30 Apr 2025 | £3.2M | £6,777 | £1.9M | £1.4M | 0 |
| 30 Apr 2024 | £3.3M | £11K | £2M | £1.4M | 2 |
| 30 Apr 2023 | £3.3M | £9,950 | £1.7M | £1.2M | 2 |
| 30 Apr 2022 | £2.8M | £15K | £1.4M | £1.1M | 3 |
| 30 Apr 2021 | £2.4M | £49K | £1.1M | £772K | 3 |
| 30 Apr 2020 | £2.3M | £44K | £970K | £758K | 3 |
| 30 Apr 2019 | £2.2M | £11K | £993K | £676K | 3 |
| 30 Apr 2018 | £2.1M | £12K | £581K | £326K | |
| 30 Apr 2017 | £2.1M | £227K | £553K | £199K |
Where Marten Developments (Sussex) Limited is registered
The registered office is in Haywards Heath (RH16), in the Mid Sussex local authority area, South East. Show RH16 3TP on a map.
Other trade companies in RH16
- Focus Heating & Plumbing LtdPlumbers and heating engineers
- More Space Sussex LtdBuilders
- Theoluca Holdings LtdMotor traders
- Vintage Const Management LimitedSpecialist contractors
- Bens Roof Cleaners Bristol LtdCleaning companies
- JL Electrical Contractors LtdElectricians
- Qore Group LimitedBuilders
- Lewis Brothers Carpentry & Construction LimitedJoiners and carpenters
Also registered at this address
24 other companies use the same registered office as Marten Developments (Sussex) Limited.
- Akehurst Heating & Renewables LimitedPlumbers and heating engineers
- Castleman and Dean LimitedProperty developers
- Chrome Property LtdProperty developers
- Clive A Stenning LimitedFinishing trades
- Dominic Johnson LimitedLandscapers and gardeners
- Durant Construction Services LimitedCivil engineering
- Dynamic Lifts LtdInstallers
- Fences LimitedLandscapers and gardeners
- GRM Property Services LtdInstallers
- HPW Homes LtdProperty developers
- Jestfun LimitedProperty developers
- Johnstone Grounds & Gardens LimitedLandscapers and gardeners
- Katz Auto Services LimitedMechanics and garages
- Kent Building and Construction LtdBuilders
- KMG Electrical Services LimitedElectricians
- Landscapes LimitedLandscapers and gardeners
- Lavender Property Services LimitedProperty developers
- Office Changes LimitedFinishing trades
- Renovation LimitedFinishing trades
- The Mellish Group LimitedProperty developers
- Vortex Building Services LimitedProperty developers
- Wealden Glass LtdGlaziers
- Westgate Developments (Sussex) LtdProperty developers
- X.D.Installations LtdElectricians
What happens if Marten Developments (Sussex) 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 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
- 01538879
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 15 January 1981 (45 years ago)
- Registered office
- 3RD Floor, 21 Perrymount Road, Haywards Heath, RH16 3TP
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 April 2025
- Last confirmation statement
- 24 May 2026
- Charges (mortgages)
- 7 outstanding of 12 registered
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 Haywards Heath
Other active civil engineering contractors registered in Haywards Heath.
- Oakley Air Conditioning Limited1999
- Silvabak Construction Limited2019
- Terry Mole Holdings Ltd2020
- Uni-Move Ltd2003
- Durant Construction Services Limited2016
- G.O.Smart Civils Limited2020
- Gismo Productions Ltd1997
- H2O Swimming Pools Limited1998
All civil engineering contractors in Haywards Heath · All trades in Haywards Heath · Civil engineering across the UK
Frequently asked questions
When are Marten Developments (Sussex) Limited's accounts due?
Marten Developments (Sussex) Limited's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Marten Developments (Sussex) Limited'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 Marten Developments (Sussex) Limited still trading?
Marten Developments (Sussex) 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 Marten Developments (Sussex) Limited do?
Marten Developments (Sussex) Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Marten Developments (Sussex) Limited?
Marten Developments (Sussex) Limited was incorporated on 15 January 1981, 45 years ago.
What is the penalty if Marten Developments (Sussex) 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 Marten Developments (Sussex) 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.