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- Sheerness
- Southern Installation Engineering Ltd
Company profile · Plumbers and heating engineers
Southern Installation Engineering Ltd
Southern Installation Engineering Ltd is a 8-year-old private limited company registered in Sheerness, company number 11370893, one of 26 plumbing and heating companies in Sheerness. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 31 May 2025, as filed at Companies House.
Southern Installation Engineering Ltd over the years
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 £22K (+162%) on the year before, to £35K.
- Net assets rose in 4 of 6 year-on-year comparisons on record.
- Current assets of £34K against £7,635 owed within a year: 4.4 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 7 years, 2019 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2025 | £35K | £0 | £34K | £7,635 | 2 |
| 31 May 2024 | £13K | £27K | £14K | 2 | |
| 31 May 2023 | £9,585 | £12K | £2,339 | 2 | |
| 31 May 2022 | £17K | £43K | £25K | 2 | |
| 31 May 2021 | £3,431 | £5,759 | £2,328 | 2 | |
| 31 May 2020 | £6,858 | £18K | £11K | 0 | |
| 31 May 2019 | £2,224 | £4,662 | £2,438 |
Where Southern Installation Engineering Ltd is registered
The registered office is in Sheerness (ME12), in the Swale local authority area, South East. Show ME12 1NY on a map.
Other trade companies in ME12
- Marine-Worx LtdMachinery repair and installation
- 5LV Electrical Solutions LtdElectricians
- Pearce & Batt Garage LimitedMechanics and garages
- Access FM LtdInstallers
- All in Hand Property Services LtdCleaning companies
- Abb (Kent) LtdPlumbers and heating engineers
- Downs Plumbing & Heating S.E. LtdPlumbers and heating engineers
- Zii Best Tyres Ltd.Motor traders
Also registered at this address
14 other companies use the same registered office as Southern Installation Engineering Ltd.
- Eastchurch Autos LimitedMechanics and garages
- Evans Brickwork LimitedBuilders
- Ferndale LimitedProperty developers
- Finesse Windows & Conservatories (Southern) LimitedGlaziers
- Geeson Contract Services LimitedFinishing trades
- H and D Scaffolding LtdScaffolders
- J Robinson Services LtdSpecialist contractors
- JPB Builders LimitedFinishing trades
- Limitless Artificial Grass & Landscapes LtdLandscapers and gardeners
- Michael Corps LimitedCleaning companies
- N H Developments (Kent) LimitedFinishing trades
- Pearce & Batt Garage LimitedMechanics and garages
- Pro Paving & Groundworks LtdCivil engineering
- Smillie Groundworks LimitedFinishing trades
What happens if Southern Installation Engineering 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 11370893
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 May 2018 (8 years ago)
- Registered office
- 1 High Street, Sheerness, Kent, ME12 1NY
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 3 August 2026
Filing notes for plumbing and heating companies
Plumbing and heating companies frequently work under CIS for main contractors and also directly for homeowners, so turnover can mix CIS and non-CIS income.
Similar companies in Sheerness
Other active plumbing and heating companies registered in Sheerness.
- SR Plumbing and Heating (South East) Ltd2023
- TMC Heating Ltd2019
- WC Plumbing Ltd2024
- Webb Plumbing and Heating Ltd2021
- Abb (Kent) Ltd2026
- Ample Plumbing & Heating Services Ltd.2015
- Ande Plumbing Ltd2011
- BRH Plumbing & Heating Ltd2025
All plumbing and heating companies in Sheerness · All trades in Sheerness · Plumbers and heating engineers across the UK
Frequently asked questions
When are Southern Installation Engineering Ltd's accounts due?
Southern Installation Engineering Ltd's next accounts are due at Companies House by 28 February 2027 (in 139 days), covering the period to 31 May 2026.
When is Southern Installation Engineering Ltd's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is Southern Installation Engineering Ltd still trading?
Southern Installation Engineering 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 Southern Installation Engineering Ltd do?
Southern Installation Engineering Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Southern Installation Engineering Ltd?
Southern Installation Engineering Ltd was incorporated on 18 May 2018, 8 years ago.
What is the penalty if Southern Installation Engineering 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 Southern Installation Engineering 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.