- Companies
- Plumbers and heating engineers
- Barnet
- Mac & Weld Limited
Mac & Weld Limited
- Company number
- 12839388
- Incorporated
- 26 Aug 20206 years trading
- Registered office
- 46 Eton Av, Eton Avenue, Barnet, EN4 8TU
- Nature of business
- Plumbing, heat and air-conditioning installation; Other construction installation; Other specialised construction activities n.e.c.
Mac & Weld Limited is a 6-year-old private limited company registered in Barnet, company number 12839388, one of 75 plumbing and heating companies in Barnet. Its next accounts are due at Companies House on 30 November 2026, and the CT600 for the period to 28 February 2026 is due at HMRC on 28 February 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 £26 (+5%) on the year before, to £542.
- Net assets rose in 4 of 4 year-on-year comparisons on record.
- 1 employee on average during the year.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Feb 2025 | £542 | £2 | £540 | 1 | |
| 29 Feb 2024 | £516 | £0 | £516 | 1 | |
| 28 Feb 2023 | £329 | £2 | £327 | 1 | |
| 28 Feb 2022 | £307 | £100 | £207 | 0 | |
| 28 Feb 2021 | £268 | £268 | 0 |
Where Mac & Weld Limited is registered
The registered office is in Barnet (EN4), in the Barnet local authority area, London. Show EN4 8TU 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
What happens if Mac & 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 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2026 to 31 Dec 2026 | £150 |
| 1 to 3 months late | 1 Jan 2027 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 31 May 2027 | £750 |
| More than 6 months late | From 1 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 12839388
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 26 August 2020 (6 years ago)
- Registered office
- 46 Eton Av, Eton Avenue, Barnet, EN4 8TU
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
Other construction installation (SIC 43290)
Other specialised construction activities n.e.c. (SIC 43999) - Year end
- 28 February (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 24 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 Barnet
Other active plumbing and heating companies registered in Barnet.
- Mark Payne Plumbing & Heating Specialist Ltd2013
- MDM Heating & Plumbing Ltd2013
- Mega Plumbing and Heating Ltd2023
- MJC Land Ltd2012
- NV Gas Tec Solutions Ltd.2017
- Paysa Gas Ltd2026
- Penthou53 Ltd2021
- PH Gas Ltd2017
All plumbing and heating companies in Barnet · All trades in Barnet · Plumbers and heating engineers across the UK
Frequently asked questions
When are Mac & Weld Limited's accounts due?
Mac & Weld Limited's next accounts are due at Companies House by 30 November 2026 (in 49 days), covering the period to 28 February 2026.
When is Mac & Weld Limited's CT600 due?
The CT600 for the period to 28 February 2026 is due at HMRC by 28 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2026.
Is Mac & Weld Limited still trading?
Mac & 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 Mac & Weld Limited do?
Mac & Weld Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220); Other construction installation (SIC 43290); Other specialised construction activities n.e.c. (SIC 43999).
How old is Mac & Weld Limited?
Mac & Weld Limited was incorporated on 26 August 2020, 6 years ago.
What is the penalty if Mac & 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 Mac & 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.