- Companies
- Plumbers and heating engineers
- Welwyn Garden City
- Dynamo 24/7 Limited
Dynamo 24/7 Limited
- Company number
- 09138446
- Incorporated
- 18 Jul 201412 years trading
- Registered office
- 29 Longlands Road, Welwyn Garden City, Hertfordshire, AL7 3QD
- Nature of business
- Plumbing, heat and air-conditioning installation
Dynamo 24/7 Limited is a 12-year-old private limited company registered in Welwyn Garden City, company number 09138446, one of 32 plumbing and heating companies in Welwyn Garden City. 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 down £175 (-45.9%) on the year before, to £206.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- 3 employees on average during the year.
- 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 |
|---|---|---|---|---|---|
| 31 Jul 2025 | £206 | £80K | 3 | ||
| 31 Jul 2024 | £381 | £62K | 3 | ||
| 31 Jul 2023 | £345 | £58K | 2 | ||
| 31 Jul 2022 | £830 | £69K | 2 | ||
| 31 Jul 2021 | £1,541 | £46K | 2 | ||
| 31 Jul 2020 | £672 | £37K | 3 | ||
| 31 Jul 2019 | £2,638 | £28K | |||
| 31 Jul 2018 | £618 | £29K | |||
| 31 Jul 2017 | £542 | £36K | |||
| 31 Jul 2016 | £512 | £4,115 | £14K |
Where Dynamo 24/7 Limited is registered
The registered office is in Welwyn Garden City (AL7), in the Welwyn Hatfield local authority area, East of England. Show AL7 3QD on a map.
Other trade companies in AL7
- Mechanicalwise LtdInstallers
- Azalea Services LimitedSpecialist contractors
- Malmech and Mannion LimitedMechanics and garages
- T&D Construction Group LtdFinishing trades
- Vertec Roofing and Building LtdRoofers
- Selectlane LtdMotor traders
- Af Pressure Washing LtdCleaning companies
- Jet Professional LtdCleaning companies
What happens if Dynamo 24/7 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
- 09138446
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 July 2014 (12 years ago)
- Registered office
- 29 Longlands Road, Welwyn Garden City, Hertfordshire, AL7 3QD
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 July (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 18 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 Welwyn Garden City
Other active plumbing and heating companies registered in Welwyn Garden City.
- Flodoc Ltd2025
- GD Jones Plumbing & Heating Limited2026
- Heatcooler Limited2025
- Heating Management Ltd2012
- Herts Plumbing & Heating Ltd2008
- Hesse Gas Supply Ltd2024
- Loui Plumbing Services Ltd2026
- LT Air Conditioning Limited2026
All plumbing and heating companies in Welwyn Garden City · All trades in Welwyn Garden City · Plumbers and heating engineers across the UK
Frequently asked questions
When are Dynamo 24/7 Limited's accounts due?
Dynamo 24/7 Limited's next accounts are due at Companies House by 30 April 2027 (in 200 days), covering the period to 31 July 2026.
When is Dynamo 24/7 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 Dynamo 24/7 Limited still trading?
Dynamo 24/7 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 Dynamo 24/7 Limited do?
Dynamo 24/7 Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Dynamo 24/7 Limited?
Dynamo 24/7 Limited was incorporated on 18 July 2014, 12 years ago.
What is the penalty if Dynamo 24/7 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 Dynamo 24/7 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.