- Companies
- Civil engineering
- Barnsley
- Synergi Ltd
Synergi Ltd
- Company number
- 11703962
- Incorporated
- 29 Nov 20187 years trading
- Registered office
- Henry Morgan House Industry Road, Carlton, Barnsley, South Yorkshire, S71 3PQ
- Nature of business
- Construction of other civil engineering projects n.e.c.
Synergi Ltd is a 7-year-old private limited company registered in Barnsley, company number 11703962, one of 89 civil engineering contractors in Barnsley. 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.
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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 £21K (-48%) on the year before, to £23K.
- Net assets rose in 1 of 5 year-on-year comparisons on record.
- Current assets of £802 against £1,223 owed within a year: 0.7 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £23K | £202 | £802 | £1,223 | 1 |
| 31 Mar 2024 | £44K | £25K | £26K | £4,987 | 1 |
| 31 Mar 2023 | £84K | £71K | £72K | £11K | 1 |
| 31 Mar 2022 | £91K | £57K | £90K | £22K | 1 |
| 31 Mar 2021 | £101K | £82K | £97K | £19K | 2 |
| 31 Mar 2020 | £43K | £20K | £57K | £15K | 1 |
Where Synergi Ltd is registered
The registered office is in Barnsley (S71), in the Barnsley local authority area, Yorkshire and The Humber. Show S71 3PQ on a map.
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Also registered at this address
21 other companies use the same registered office as Synergi Ltd.
- A Thompson Installations LtdElectricians
- Aquavision Construction LtdInstallers
- Betta Contracts LtdInstallers
- Betta Windows LtdGlaziers
- C. U. J. LimitedMechanics and garages
- Complete Plastering LtdPlasterers
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- Garwood Roofing LtdRoofers
- J & B Construction (Yorkshire) LtdBuilders
- Join & Build LtdJoiners and carpenters
- K & K Potts LimitedMechanics and garages
- Kja Services (Yorkshire) LtdInstallers
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- Piling Services LtdBuilders
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- R D Developments (Yorkshire) LtdBuilders
- Seddon Brickwork LtdBuilders
- Solid Fuel Solutions LimitedInstallers
- Strebor Vehicle Services LtdMechanics and garages
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- T. Lingard & Sons LimitedGroundworks and demolition
What happens if Synergi 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 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
- 11703962
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 November 2018 (7 years ago)
- Registered office
- Henry Morgan House Industry Road, Carlton, Barnsley, South Yorkshire, S71 3PQ
- 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
- 31 March 2025
- Last confirmation statement
- 5 December 2025
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 Barnsley
Other active civil engineering contractors registered in Barnsley.
- T & A Construction Ltd2003
- Tekhnee Communications Limited2021
- TJH Plant Ltd2024
- TLH Utilities Ltd2023
- Trenchless Plant Hire Ltd2013
- W.S. Civil Engineering Limited2008
- WB Precast Services Ltd2018
- WM & GP Groundworks Ltd2014
All civil engineering contractors in Barnsley · All trades in Barnsley · Civil engineering across the UK
Frequently asked questions
When are Synergi Ltd's accounts due?
Synergi Ltd's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Synergi Ltd'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 Synergi Ltd still trading?
Synergi 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 Synergi Ltd do?
Synergi Ltd is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Synergi Ltd?
Synergi Ltd was incorporated on 29 November 2018, 7 years ago.
What is the penalty if Synergi 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 Synergi 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.