Company profile · Plumbers and heating engineers
Isoare Ltd
Isoare Ltd is a 10-year-old private limited company registered in Luton, company number 09869698, one of 158 plumbing and heating companies in Luton. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 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 Isoare LtdOr 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.
Financial snapshot, 2025
From the balance sheet at 30 November 2025, as filed at Companies House.
Isoare Ltd 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 £4,481 (+94.6%) on the year before, to £9,216.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £7,398 against £2,927 owed within a year: 2.5 times cover.
- 3 employees on average, down from 8 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 Nov 2025 | £9,216 | £4,148 | £7,398 | £2,927 | 3 |
| 30 Nov 2024 | £4,735 | £628 | £3,242 | £1,434 | 8 |
| 30 Nov 2023 | £6,662 | £6,399 | £9,011 | £1,556 | 8 |
| 30 Nov 2022 | £2,905 | £12K | £18K | £660 | 8 |
| 30 Nov 2021 | £1,185 | £8,817 | £40K | £1 | 8 |
| 30 Nov 2020 | £22K | £64K | £77K | £5,172 | 8 |
| 30 Nov 2019 | £4,941 | £11K | £25K | £20K | 8 |
| 30 Nov 2018 | £1,285 | £1,589 | £15K | £14K | |
| 30 Nov 2017 | £4,015 | £981 | £8,536 | £4,521 | |
| 30 Nov 2016 | £3,739 | £869 | £8,424 | £4,685 |
Where Isoare Ltd is registered
The registered office is in Luton (LU4), in the Luton local authority area, East of England. Show LU4 0BU on a map.
Other trade companies in LU4
- Kai Properties LtdProperty developers
- Surrey Design and Build LtdRoofers
- Lignora LtdFloor and wall tilers
- MK Services Pro LtdProperty developers
- Amp Vision Solutions LtdElectricians
- S R Auto Motors LimitedMotor traders
- Arseley Motor Group LtdMotor traders
- F Martini Building & Roofing LtdBuilders
What happens if Isoare Ltd 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 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- 09869698
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 12 November 2015 (10 years ago)
- Registered office
- 56 Charlwood Road, Luton, LU4 0BU
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 November (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 15 October 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 Luton
Other active plumbing and heating companies registered in Luton.
- Jag Heating Ltd2026
- Jemat Heating (Domestic) Limited1981
- JJ HPV Ltd2025
- John Smart Heating Ltd2024
- JW Plumbing Services Ltd2022
- K. Sellers Plumbing & Heating Limited2006
- Karol Heating and Plumbing Limited2020
- Kaya Water and Fire Ltd2025
All plumbing and heating companies in Luton · All trades in Luton · Plumbers and heating engineers across the UK
Frequently asked questions
When are Isoare Ltd's accounts due?
Isoare Ltd's next accounts are due at Companies House by 31 August 2027 (in 323 days), covering the period to 30 November 2026.
When is Isoare Ltd's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is Isoare Ltd still trading?
Isoare Ltd 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 Isoare Ltd do?
Isoare Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Isoare Ltd?
Isoare Ltd was incorporated on 12 November 2015, 10 years ago.
What is the penalty if Isoare Ltd 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 Isoare Ltd 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.