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- Consett
- A1 Ventilation Services Limited
Company profile · Plumbers and heating engineers
A1 Ventilation Services Limited
A1 Ventilation Services Limited is a 9-year-old private limited company registered in Consett, company number 10896518, one of 28 plumbing and heating companies in Consett. Its next accounts are due at Companies House on 31 May 2027, and the CT600 for the period to 31 August 2026 is due at HMRC on 31 August 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 31 August 2025, as filed at Companies House.
A1 Ventilation Services Limited over the years
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 £6,236 (+6.3%) on the year before, to £106K.
- Net assets rose in 6 of 7 year-on-year comparisons on record.
- Current assets of £107K against £12K owed within a year: 9.3 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 8 years, 2018 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | £106K | £68K | £107K | £12K | 1 |
| 31 Aug 2024 | £100K | £108K | £139K | £41K | 1 |
| 31 Aug 2023 | £34K | £61K | £74K | £37K | 1 |
| 31 Aug 2022 | £30K | £78K | £85K | £48K | 1 |
| 31 Aug 2021 | £49K | £104K | £164K | £104K | 1 |
| 31 Aug 2020 | £31K | £59K | £129K | £78K | 1 |
| 31 Aug 2019 | £29K | £18K | £18K | £11K | |
| 31 Aug 2018 | £15K | £12K | £12K | £3,519 |
Where A1 Ventilation Services Limited is registered
The registered office is in Consett (DH8), in the County Durham local authority area, North East. Show DH8 0JB on a map.
Other trade companies in DH8
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- Machine Service Solutions LtdMachinery repair and installation
- Ag Motors Ne LimitedMotor traders
- SWS Scaffolding Ne LimitedScaffolders
- GH Management and Operator Services North East LtdSpecialist contractors
- Avana Property Solutions LimitedProperty developers
- Promptech Mechanical LtdBuilders
- Kee Home Solutions LtdJoiners and carpenters
What happens if A1 Ventilation Services 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 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 31 Aug 2027 | £375 |
| 3 to 6 months late | 1 Sep 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 10896518
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 2 August 2017 (9 years ago)
- Registered office
- 22 Riverside, Consett, DH8 0JB
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 19 August 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 Consett
Other active plumbing and heating companies registered in Consett.
- Aca Gas, Heating and Plumbing Ltd2021
- Compass Ne Limited2019
- Consett Gas Stoves & Bathrooms Limited2017
- DC Installations (Ne) Limited2018
- Derwentside Gas Limited2007
- Efficient Heating Solutions North East Limited2022
- GMD Plumbing & Heating Specialists Ltd2025
- Ignis Plumb Ltd2024
All plumbing and heating companies in Consett · All trades in Consett · Plumbers and heating engineers across the UK
Frequently asked questions
When are A1 Ventilation Services Limited's accounts due?
A1 Ventilation Services Limited's next accounts are due at Companies House by 31 May 2027 (in 231 days), covering the period to 31 August 2026.
When is A1 Ventilation Services Limited's CT600 due?
The CT600 for the period to 31 August 2026 is due at HMRC by 31 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2027.
Is A1 Ventilation Services Limited still trading?
A1 Ventilation Services Limited is listed as active on the Companies House register (checked 12 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 A1 Ventilation Services Limited do?
A1 Ventilation Services Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is A1 Ventilation Services Limited?
A1 Ventilation Services Limited was incorporated on 2 August 2017, 9 years ago.
What is the penalty if A1 Ventilation Services 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 A1 Ventilation Services Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.