- Companies
- Specialist contractors
- Middlesbrough
- Syntex Engineering Services Limited
Syntex Engineering Services Limited
- Company number
- 01713546
- Incorporated
- 8 Apr 198343 years trading
- Registered office
- Unit 2 Brewsdale Road, Brewsdale Road, Middlesbrough, TS3 6LJ
- Nature of business
- Other specialised construction activities n.e.c.
Syntex Engineering Services Limited is a 43-year-old private limited company registered in Middlesbrough, company number 01713546, one of 191 specialist construction companies in Middlesbrough. Its next accounts are due at Companies House on 22 December 2026, and its first CT600 is due at HMRC on 28 September 2026.
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 £8,174 (-6%) on the year before, to -£144K.
- Net assets rose in 3 of 9 year-on-year comparisons on record.
- Current assets of £787K against £963K owed within a year: 0.8 times cover.
- 11 employees on average, down from 12 the year before.
- Balance sheets on record for 10 years, 2015 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Sep 2024 | -£144K | £50K | £787K | £963K | 11 |
| 30 Sep 2023 | -£136K | £31K | £572K | £673K | 12 |
| 30 Sep 2022 | £42K | £14K | £645K | £528K | 16 |
| 30 Sep 2021 | £48K | £78K | £723K | £560K | 12 |
| 30 Sep 2020 | £232K | £103K | £571K | £204K | 18 |
| 30 Sep 2019 | £595K | £75K | £912K | £391K | 24 |
| 30 Sep 2018 | £496K | £55K | £1.1M | £641K | 21 |
| 30 Sep 2017 | £437K | £19K | £996K | £630K | 17 |
| 30 Sep 2016 | £426K | £65K | £848K | £500K | |
| 30 Sep 2015 | £432K | £12K | £740K | £370K |
Where Syntex Engineering Services Limited is registered
The registered office is in Middlesbrough (TS3), in the Middlesbrough local authority area, North East. Show TS3 6LJ on a map.
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- Kaw Engineering Services LimitedElectricians
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- Cleveland Landscapes LtdLandscapers and gardeners
What happens if Syntex Engineering Services 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 22 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 23 Dec 2026 to 22 Jan 2027 | £150 |
| 1 to 3 months late | 23 Jan 2027 to 22 Mar 2027 | £375 |
| 3 to 6 months late | 23 Mar 2027 to 22 Jun 2027 | £750 |
| More than 6 months late | From 23 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 23 Mar 2027 | £200 |
| 3 months late | 22 Jun 2027 | another £200 |
| 6 months late | 22 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 22 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
- 01713546
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 8 April 1983 (43 years ago)
- Registered office
- Unit 2 Brewsdale Road, Brewsdale Road, Middlesbrough, TS3 6LJ
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 26 September (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 28 September 2024
- Last confirmation statement
- 11 February 2026
- Charges (mortgages)
- 0 outstanding of 6 registered
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Middlesbrough
Other active specialist construction companies registered in Middlesbrough.
- T.B.C.C.K Ltd2025
- Tees Fire Systems Limited2002
- The Oil Safety Group Limited2011
- The Paving People Specialists Ltd2025
- Tom Leng Engineering Limited2019
- Trade Windows and Conservatories Limited2019
- TS Communications Ltd2024
- Ucs Renewables Limited2010
All specialist construction companies in Middlesbrough · All trades in Middlesbrough · Specialist contractors across the UK
Frequently asked questions
When are Syntex Engineering Services Limited's accounts due?
Syntex Engineering Services Limited's next accounts are due at Companies House by 22 December 2026 (in 71 days), covering the period to 22 March 2026.
When is Syntex Engineering Services Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 28 September 2025, due by 28 September 2026, and one for the period to 22 March 2026, due by 22 March 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Syntex Engineering Services Limited still trading?
Syntex Engineering Services 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 Syntex Engineering Services Limited do?
Syntex Engineering Services Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Syntex Engineering Services Limited?
Syntex Engineering Services Limited was incorporated on 8 April 1983, 43 years ago.
What is the penalty if Syntex Engineering Services 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 Syntex Engineering Services 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.