West Siphonics Systems Limited
- Company number
- SC381758
- Incorporated
- 9 Jul 201016 years trading
- Registered office
- 94 Brown Street, Newmilns, KA16 9BP
- Nature of business
- Roofing activities
West Siphonics Systems Limited is a 16-year-old private limited company registered in Newmilns, company number SC381758, one of the UK's roofing companies. Its next accounts are due at Companies House on 30 June 2027, and the CT600 for the period to 30 September 2026 is due at HMRC on 30 September 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 £271K (-13%) on the year before, to £1.8M.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- 36 employees on average, down from 37 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 |
|---|---|---|---|---|---|
| 30 Sep 2025 | £1.8M | £516K | £913K | 36 | |
| 30 Sep 2024 | £2.1M | £910K | £1.5M | 37 | |
| 30 Sep 2023 | £1.8M | £679K | £2.9M | £1.2M | 37 |
| 30 Sep 2022 | £871K | £0 | £2.1M | £1.3M | 33 |
| 30 Sep 2021 | £621K | £73K | £2.5M | £2M | 26 |
| 30 Sep 2020 | £625K | £421K | £2M | £1.4M | 26 |
| 30 Sep 2019 | £557K | £172K | £1.9M | £1.4M | 27 |
| 30 Sep 2018 | £454K | £57K | £1.7M | £1.3M | 16 |
| 30 Sep 2017 | £374K | £32K | £821K | £511K | 12 |
| 30 Sep 2016 | £195K | £22K | £370K | £187K |
Where West Siphonics Systems Limited is registered
The registered office is in Newmilns (KA16), in the East Ayrshire local authority area, Scotland. Show KA16 9BP on a map.
Other trade companies in KA16
- Thistle Property Care 2027 LtdRoofers
- Rapid Roofing & Rendering LimitedRoofers
- Newmilns Tyre LtdMechanics and garages
- Ayrshire Gardening Services LtdLandscapers and gardeners
- Amt Bodyshop LtdPainters and decorators
- Ako Tyres LtdMechanics and garages
- Nelson Renovations LtdJoiners and carpenters
- B Devere LimitedJoiners and carpenters
Also registered at this address
1 other company uses the same registered office as West Siphonics Systems Limited.
- West Siphonics LimitedRoofers
What happens if West Siphonics Systems 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 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2027 to 31 Jul 2027 | £150 |
| 1 to 3 months late | 1 Aug 2027 to 30 Sep 2027 | £375 |
| 3 to 6 months late | 1 Oct 2027 to 31 Dec 2027 | £750 |
| More than 6 months late | From 1 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- SC381758
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 July 2010 (16 years ago)
- Registered office
- 94 Brown Street, Newmilns, KA16 9BP
- Nature of business
- Roofing activities (SIC 43910)
- Year end
- 30 September (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 9 July 2026
- Charges (mortgages)
- 1 outstanding of 1 registered
- Previous names
- West Siphonics (South) Limited (until 5 Apr 2012)
Filing notes for roofing companies
Roofing companies commonly work under CIS and run vans and access equipment, so CIS deductions and capital allowances are the two things to get right.
Similar companies
Other active roofing companies.
Frequently asked questions
When are West Siphonics Systems Limited's accounts due?
West Siphonics Systems Limited's next accounts are due at Companies House by 30 June 2027 (in 260 days), covering the period to 30 September 2026.
When is West Siphonics Systems Limited's CT600 due?
The CT600 for the period to 30 September 2026 is due at HMRC by 30 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2027.
Is West Siphonics Systems Limited still trading?
West Siphonics Systems 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 West Siphonics Systems Limited do?
West Siphonics Systems Limited is registered under Roofing activities (SIC 43910).
How old is West Siphonics Systems Limited?
West Siphonics Systems Limited was incorporated on 9 July 2010, 16 years ago.
What is the penalty if West Siphonics Systems 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 West Siphonics Systems 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.