- Companies
- Plumbers and heating engineers
- Harlow
- Optimal Heat Ltd
Optimal Heat Ltd
- Company number
- 15514056
- Incorporated
- 22 Feb 20242 years trading
- Registered office
- 92 Woodcroft, Harlow, CM18 6YA
- Nature of business
- Plumbing, heat and air-conditioning installation
Optimal Heat Ltd is a 2-year-old private limited company registered in Harlow, company number 15514056, one of 97 plumbing and heating companies in Harlow. Its next accounts are due at Companies House on 30 November 2027, and the CT600 for the period to 28 February 2027 is due at HMRC on 28 February 2028.
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 £3,895 (+106.1%) on the year before, to £7,565.
- Current assets of £9,051 against £15K owed within a year: 0.6 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 2 years, 2025 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Feb 2026 | £7,565 | £9,051 | £15K | 1 | |
| 28 Feb 2025 | £3,670 | £7,552 | £3,729 | 1 |
Where Optimal Heat Ltd is registered
The registered office is in Harlow (CM18), in the Harlow local authority area, East of England. Show CM18 6YA on a map.
Other trade companies in CM18
- Ejc Lofts LtdBuilders
- The Kinsmann Group LimitedFacilities management
- E.F Maintenance LtdElectricians
- Fellas Construction LtdBuilders
- 5Wheels Recovery LtdMechanics and garages
- Troy Select Motors LtdMotor traders
- Attwell Roofing and Construction LtdRoofers
- All About Roofing and Building LtdRoofers
Also registered at this address
2 other companies use the same registered office as Optimal Heat Ltd.
- Hertfordshire Ideal Homes LtdFinishing trades
- MKB Construction LtdBuilders
What happens if Optimal Heat 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 30 November 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2027 to 31 Dec 2027 | £150 |
| 1 to 3 months late | 1 Jan 2028 to 29 Feb 2028 | £375 |
| 3 to 6 months late | 1 Mar 2028 to 31 May 2028 | £750 |
| More than 6 months late | From 1 Jun 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 29 Feb 2028 | £200 |
| 3 months late | 28 May 2028 | another £200 |
| 6 months late | 28 Aug 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 2029 | 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
- 15514056
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 February 2024 (2 years ago)
- Registered office
- 92 Woodcroft, Harlow, CM18 6YA
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 29 February (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 28 February 2026
- Last confirmation statement
- 24 September 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 Harlow
Other active plumbing and heating companies registered in Harlow.
- Parklands Plumbing Ltd2024
- Paul the Gas Ltd2026
- Payne's Plumbing & Heating Ltd2026
- Pikes Plumbing & Heating Ltd2015
- Plumb in London Limited2019
- Quality Tech Engineering Ltd2024
- R1 Gas Limited2020
- Redthegas Heating Ltd2011
All plumbing and heating companies in Harlow · All trades in Harlow · Plumbers and heating engineers across the UK
Frequently asked questions
When are Optimal Heat Ltd's accounts due?
Optimal Heat Ltd's next accounts are due at Companies House by 30 November 2027 (in 413 days), covering the period to 28 February 2027.
When is Optimal Heat Ltd's CT600 due?
The CT600 for the period to 28 February 2027 is due at HMRC by 28 February 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2027.
Is Optimal Heat Ltd still trading?
Optimal Heat Ltd is listed as active on the Companies House register (checked 13 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 Optimal Heat Ltd do?
Optimal Heat Ltd is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Optimal Heat Ltd?
Optimal Heat Ltd was incorporated on 22 February 2024, 2 years ago.
What is the penalty if Optimal Heat 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 Optimal Heat Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.