- Companies
- Plumbers and heating engineers
- Harpenden
- Hertfordshire Air Conditioning Limited
Hertfordshire Air Conditioning Limited
- Company number
- 09636085
- Incorporated
- 12 Jun 201511 years trading
- Registered office
- Rivers Lodge, West Common, Harpenden, Herts, AL5 2JD
- Nature of business
- Plumbing, heat and air-conditioning installation
Hertfordshire Air Conditioning Limited is a 11-year-old private limited company registered in Harpenden, company number 09636085, one of 22 plumbing and heating companies in Harpenden. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Hertfordshire Air Conditioning LimitedOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £24K (-22.9%) on the year before, to £80K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £221K against £166K owed within a year: 1.3 times cover.
- 4 employees on average, up from 3 the year before.
- 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 |
|---|---|---|---|---|---|
| 30 Jun 2025 | £80K | £111K | £221K | £166K | 4 |
| 30 Jun 2024 | £104K | £134K | £242K | £147K | 3 |
| 30 Jun 2023 | £117K | £231K | £253K | £156K | 3 |
| 30 Jun 2022 | £64K | £144K | £175K | £121K | 2 |
| 30 Jun 2021 | £83K | £137K | £170K | £96K | 1 |
| 30 Jun 2020 | £31K | £102K | £102K | £80K | 1 |
| 30 Jun 2019 | £23K | £99K | £85K | 1 | |
| 30 Jun 2018 | -£4,491 | £34K | £50K | ||
| 30 Jun 2017 | -£2,118 | £22K | £25K | ||
| 30 Jun 2016 | -£3,365 | £2,675 | £6,040 |
Where Hertfordshire Air Conditioning Limited is registered
The registered office is in Harpenden (AL5), in the St Albans local authority area, East of England. Show AL5 2JD on a map.
Other trade companies in AL5
- M&T Building Services LimitedBuilders
- Rolfe Groundworks LtdGroundworks and demolition
- Rolls and Sons LtdProperty developers
- WM Holdings Group LtdProperty developers
- A Hussain Motor Group LtdMotor traders
- Harpenden Window Cleaning LtdCleaning companies
- Honey Bear Energy LimitedPlumbers and heating engineers
- M&D Paving LtdCivil engineering
Also registered at this address
15 other companies use the same registered office as Hertfordshire Air Conditioning Limited.
- Agecourt LimitedProperty developers
- Colne View LimitedProperty developers
- Diagrid LimitedProperty developers
- Graphic Building Products LtdSpecialist contractors
- GRC Automotive LtdMechanics and garages
- Harpenden Home Handyman Services LtdFinishing trades
- Homexe LtdElectricians
- J A Wright Construction LtdInstallers
- Kcpi LimitedFinishing trades
- Lewis Property Design & Build LtdSpecialist contractors
- MHR Renovations LtdSpecialist contractors
- Platinum Housekeeping LimitedCleaning companies
- Proline Roofing and Building LtdRoofers
- Riseley Plumbing Services LimitedPlumbers and heating engineers
- Thenineteenth LtdInstallers
What happens if Hertfordshire Air Conditioning 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 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 09636085
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 12 June 2015 (11 years ago)
- Registered office
- Rivers Lodge, West Common, Harpenden, Herts, AL5 2JD
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 1 March 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 Harpenden
Other active plumbing and heating companies registered in Harpenden.
- Herts Air Conditioning Ltd2025
- Highview Plumbing and Heating Limited2013
- Honey Bear Energy Limited2026
- Hurleys Home Renovations Ltd2025
- Igm Plumbing, Heating & Leak Detection Limited2023
- Plumb Marshall Ltd2020
- Proflame Heating Ltd2026
- Quantech Air Conditioning Ltd2026
All plumbing and heating companies in Harpenden · All trades in Harpenden · Plumbers and heating engineers across the UK
Frequently asked questions
When are Hertfordshire Air Conditioning Limited's accounts due?
Hertfordshire Air Conditioning Limited's next accounts are due at Companies House by 31 March 2027 (in 169 days), covering the period to 30 June 2026.
When is Hertfordshire Air Conditioning Limited's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is Hertfordshire Air Conditioning Limited still trading?
Hertfordshire Air Conditioning 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 Hertfordshire Air Conditioning Limited do?
Hertfordshire Air Conditioning Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Hertfordshire Air Conditioning Limited?
Hertfordshire Air Conditioning Limited was incorporated on 12 June 2015, 11 years ago.
What is the penalty if Hertfordshire Air Conditioning 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 Hertfordshire Air Conditioning 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.