- Companies
- Plumbers and heating engineers
- Maidenhead
- Harmer Group Services Limited
Harmer Group Services Limited
- Company number
- 17391151
- Incorporated
- 10 Aug 2026
- Registered office
- 85 Greenfields, Maidenhead, SL6 1BB
- Nature of business
- Plumbing, heat and air-conditioning installation
Harmer Group Services Limited is a newly incorporated private limited company registered in Maidenhead, company number 17391151, one of 45 plumbing and heating companies in Maidenhead. Its next accounts are due at Companies House on 10 May 2028, and its first CT600 is due at HMRC on 9 August 2028.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where Harmer Group Services Limited is registered
The registered office is in Maidenhead (SL6), in the Windsor and Maidenhead local authority area, South East. Show SL6 1BB on a map.
Other trade companies in SL6
- B&M Cleaning Solutions LtdCleaning companies
- CC Garden Builds LtdBuilders
- Austin Groundwork Surfaces LimitedGroundworks and demolition
- Woodnest Interiors LtdJoiners and carpenters
- Carizmatic Company LimitedMotor traders
- Sakura Electrical LtdElectricians
- Elite Autos & Tyres LtdMotor traders
- Bigfrith End LtdSpecialist contractors
What happens if Harmer Group 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 10 May 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 11 May 2028 to 10 Jun 2028 | £150 |
| 1 to 3 months late | 11 Jun 2028 to 10 Aug 2028 | £375 |
| 3 to 6 months late | 11 Aug 2028 to 10 Nov 2028 | £750 |
| More than 6 months late | From 11 Nov 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2028 | £200 |
| 3 months late | 30 Nov 2028 | another £200 |
| 6 months late | 28 Feb 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 17391151
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 10 August 2026
- Registered office
- 85 Greenfields, Maidenhead, SL6 1BB
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 August (accounting reference date)
- Accounts type
- No accounts filed yet
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 Maidenhead
Other active plumbing and heating companies registered in Maidenhead.
- Harwoods Plumbing and Heating Ltd2023
- Heatflow Installations Ltd.2014
- Heritage Energy Solutions Ltd2026
- K & L Heating & Bathrooms Limited2007
- Kings Plumbing & Heating Limited2002
- Macdonald Plumbing and Heating Services Limited2008
- Metainy Air Conditioning Limited2000
- NJC Heating Limited2018
All plumbing and heating companies in Maidenhead · All trades in Maidenhead · Plumbers and heating engineers across the UK
Frequently asked questions
When are Harmer Group Services Limited's accounts due?
Harmer Group Services Limited's next accounts are due at Companies House by 10 May 2028 (in 575 days), covering the period to 31 August 2027.
When is Harmer Group Services Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 9 August 2027, due by 9 August 2028, and one for the period to 31 August 2027, due by 31 August 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Harmer Group Services Limited still trading?
Harmer Group Services 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 Harmer Group Services Limited do?
Harmer Group Services Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Harmer Group Services Limited?
Harmer Group Services Limited was incorporated on 10 August 2026, less than a year ago.
What is the penalty if Harmer Group 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 Harmer Group Services 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.