- Companies
- Plumbers and heating engineers
- Barnet
- KCS Weld Limited
KCS Weld Limited
- Company number
- 12099071
- Incorporated
- 12 Jul 20197 years trading
- Registered office
- 120 Alverstone Avenue, East Barnet, Barnet, EN4 8EE
- Nature of business
- Plumbing, heat and air-conditioning installation
KCS Weld Limited is a 7-year-old private limited company registered in Barnet, company number 12099071, one of 75 plumbing and heating companies in Barnet. Its next accounts are due at Companies House on 30 April 2027, and the CT600 for the period to 31 July 2026 is due at HMRC on 31 July 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 up £117K (+20.1%) on the year before, to £697K.
- Net assets rose in 5 of 5 year-on-year comparisons on record.
- Current assets of £1.1M against £454K owed within a year: 2.4 times cover.
- 3 employees 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 Jul 2025 | £697K | £327K | £1.1M | £454K | 3 |
| 31 Jul 2024 | £580K | £594K | £1.2M | £678K | 3 |
| 31 Jul 2023 | £177K | £161K | £310K | £132K | 3 |
| 31 Jul 2022 | £157K | £40K | £266K | £101K | 2 |
| 31 Jul 2021 | £134K | £115K | £219K | £67K | 3 |
| 31 Jul 2020 | £70K | £48K | £136K | £76K | 3 |
Public contracts won
KCS Weld Limited has one public sector contract award on record; the ones with their own published value total £36K (2025). Source: Contracts Finder and Find a Tender award notices. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| North East London NHS Foundation Trust | Copper Piping Works | £36K | 8 Sep 2025 |
Where KCS Weld Limited is registered
The registered office is in Barnet (EN4), in the Barnet local authority area, London. Show EN4 8EE on a map.
Other trade companies in EN4
- Mechanica Frequentia Calculi LtdElectricians
- Conrad Cleaning LimitedCleaning companies
- Vreto & Co LtdCleaning companies
- Reclaim Automotive UK LtdMotor traders
- We Love 500'S LimitedMechanics and garages
- Vanta Gas & Heating LtdBuilders
- T C Developments LtdProperty developers
- Xran LtdBuilders
Also registered at this address
1 other company uses the same registered office as KCS Weld Limited.
- KCS Land & Property LimitedProperty developers
What happens if KCS Weld 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 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2027 to 31 May 2027 | £150 |
| 1 to 3 months late | 1 Jun 2027 to 31 Jul 2027 | £375 |
| 3 to 6 months late | 1 Aug 2027 to 31 Oct 2027 | £750 |
| More than 6 months late | From 1 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 12099071
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 12 July 2019 (7 years ago)
- Registered office
- 120 Alverstone Avenue, East Barnet, Barnet, EN4 8EE
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 July (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 9 July 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 Barnet
Other active plumbing and heating companies registered in Barnet.
- Keystone Retrofit Group Ltd2026
- Knebworth Plumbing Solutions Ltd2026
- Koolworks Ltd2021
- L&A Plumbing and Heating Ltd2023
- Leb Gas & Plumbing Ltd2025
- LJC Plumbing Limited2025
- London Renew & Refurb Limited2018
- Mac & Weld Limited2020
All plumbing and heating companies in Barnet · All trades in Barnet · Plumbers and heating engineers across the UK
Frequently asked questions
When are KCS Weld Limited's accounts due?
KCS Weld Limited's next accounts are due at Companies House by 30 April 2027 (in 199 days), covering the period to 31 July 2026.
When is KCS Weld Limited's CT600 due?
The CT600 for the period to 31 July 2026 is due at HMRC by 31 July 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 May 2027.
Is KCS Weld Limited still trading?
KCS Weld 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 KCS Weld Limited do?
KCS Weld Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is KCS Weld Limited?
KCS Weld Limited was incorporated on 12 July 2019, 7 years ago.
Has KCS Weld Limited won public sector contracts?
Yes. KCS Weld Limited has one contract award from public bodies on Contracts Finder and Find a Tender (those with their own published value total £36K), most recently from North East London NHS Foundation Trust.
What is the penalty if KCS Weld 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 KCS Weld 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.