- Companies
- Plumbers and heating engineers
- Southampton
- Castleway Limited
Castleway Limited
- Company number
- 02975441
- Incorporated
- 6 Oct 199432 years trading
- Registered office
- Unit 104, Solent Business Centre, Millbrook Road West, Southampton, SO15 0HW
- Nature of business
- Plumbing, heat and air-conditioning installation
Castleway Limited is a 32-year-old private limited company registered in Southampton, company number 02975441, one of 246 plumbing and heating companies in Southampton. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 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 £19K (-25.7%) on the year before, to £56K.
- Net assets rose in 4 of 8 year-on-year comparisons on record.
- Current assets of £119K against £2,833 owed within a year: more than 10 times cover.
- 4 employees on average during the year.
- Balance sheets on record for 10 years, 2015 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Oct 2025 | £56K | £54K | £119K | £2,833 | 4 |
| 31 Oct 2024 | £75K | £103K | £170K | £25K | 4 |
| 31 Oct 2023 | £93K | £30K | £166K | £12K | 4 |
| 31 Oct 2022 | £78K | £91K | £188K | £8,283 | 4 |
| 31 Oct 2021 | £43K | £120K | £216K | £2,650 | 4 |
| 31 Oct 2020 | £54K | £46K | £104K | £42K | 4 |
| 31 Oct 2019 | £75K | £70K | £153K | £108K | 4 |
| 31 Oct 2018 | £64K | £55K | £120K | £94K | |
| 31 Oct 2017 | £59K | £49K | £147K | £108K | |
| 31 Oct 2015 | £64K | £9,312 | £90K | £73K |
Where Castleway Limited is registered
The registered office is in Southampton (SO15), in the Southampton local authority area, South East. Show SO15 0HW on a map.
Other trade companies in SO15
- Enginetek Marine LimitedMachinery repair and installation
- The DPF Guy LtdMechanics and garages
- Redbridge Accident Repair LtdMechanics and garages
- Mahakali Engineer Services LtdMachinery repair and installation
- Genuinecarpartsuk LtdMotor traders
- MK Cars & Parts LtdMotor traders
- SMS Building LimitedFinishing trades
- Sonridge Building Group LtdCivil engineering
Shared registered office
36 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Castleway 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 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 02975441
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 6 October 1994 (32 years ago)
- Registered office
- Unit 104, Solent Business Centre, Millbrook Road West, Southampton, SO15 0HW
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 October (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 20 September 2026
- Charges (mortgages)
- 1 outstanding of 1 registered
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 Southampton
Other active plumbing and heating companies registered in Southampton.
- CF Heating Limited2014
- CH4 Services Limited2014
- Chilor Group Ltd2020
- City Plumbing & Heating Southern Ltd2021
- Climate Change Services Ltd2020
- Climate Gas Ltd2012
- Coles Plumbing and Heating Ltd2025
- Complete Solutions CS UK Ltd2017
All plumbing and heating companies in Southampton · All trades in Southampton · Plumbers and heating engineers across the UK
Frequently asked questions
When are Castleway Limited's accounts due?
Castleway Limited's next accounts are due at Companies House by 31 July 2027 (in 291 days), covering the period to 31 October 2026.
When is Castleway Limited's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is Castleway Limited still trading?
Castleway 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 Castleway Limited do?
Castleway Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Castleway Limited?
Castleway Limited was incorporated on 6 October 1994, 32 years ago.
What is the penalty if Castleway 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 Castleway 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.