W4K Ltd
- Company number
- 16056839
- Incorporated
- 3 Nov 20241 year trading
- Registered office
- 4 Heol Ceri, Waunarlwydd, Swansea, SA5 4QU
- Nature of business
- Plumbing, heat and air-conditioning installation; Plastering
W4K Ltd is a 1-year-old private limited company registered in Swansea, company number 16056839, one of 148 plumbing and heating companies in Swansea. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 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 30 November 2025, as filed at Companies House.
Where W4K Ltd is registered
The registered office is in Swansea (SA5), in the Swansea local authority area, Wales. Show SA5 4QU on a map.
Other trade companies in SA5
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- LJ Cleaning Swansea LimitedCleaning companies
- Same Day Roof Repairs Swansea LtdRoofers
- Warlow&Co LimitedProperty developers
- RNJ Vehicle Repairs LtdMechanics and garages
- Erj's Recovery and Transportation LtdMotor traders
- Brandrick Group LimitedElectricians
- Chris Chambers Holdings LimitedElectricians
Also registered at this address
12 other companies use the same registered office as W4K Ltd.
- Concept Carpentry Solutions LtdProperty developers
- Freshwater Interiors LtdPlumbers and heating engineers
- Jonsil Bricklaying Contractors LtdInstallers
- Marcus Technical Solutions LtdPlasterers
- Pro-Base Installations LtdInstallers
- RMB Electrical LtdElectricians
- Robert Thomas Painters & Decorators LtdFloor and wall tilers
- S J Bevan Carpentry & Joinery LtdJoiners and carpenters
- Supreme Ceilings & Carpentry LtdJoiners and carpenters
- Thermal Insulation Co. LimitedInstallers
- Third Stone Interior Solutions LtdInstallers
- West Coast Decorators LtdFloor and wall tilers
What happens if W4K 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 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 16056839
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 3 November 2024 (1 year ago)
- Registered office
- 4 Heol Ceri, Waunarlwydd, Swansea, SA5 4QU
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
Plastering (SIC 43310) - Year end
- 30 November (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 2 November 2025
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 Swansea
Other active plumbing and heating companies registered in Swansea.
- Warmerhomes Plumbing and Heating Ltd2023
- Warmgen Plumbing and Heating Ltd2026
- Warmserve Services Limited2013
- Watershield (SW) Ltd2009
- Webborn's Industrial Services Ltd2025
- Whitecross and Son Limited2003
- 6 Energy Limited2026
- Abertawe Heating & Plumbing Ltd2013
All plumbing and heating companies in Swansea · All trades in Swansea · Plumbers and heating engineers across the UK
Frequently asked questions
When are W4K Ltd's accounts due?
W4K Ltd's next accounts are due at Companies House by 31 August 2027 (in 323 days), covering the period to 30 November 2026.
When is W4K Ltd's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is W4K Ltd still trading?
W4K 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 W4K Ltd do?
W4K Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220); Plastering (SIC 43310).
How old is W4K Ltd?
W4K Ltd was incorporated on 3 November 2024, 1 year ago.
What is the penalty if W4K 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 W4K 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.