- Companies
- Plumbers and heating engineers
- Exmouth
- Sidmarc Limited
Sidmarc Limited
- Company number
- 04909120
- Incorporated
- 23 Sep 200323 years trading
- Registered office
- 28 Alexandra Terrace, Exmouth, Devon, EX8 1BD
- Nature of business
- Plumbing, heat and air-conditioning installation
Sidmarc Limited is a 23-year-old private limited company registered in Exmouth, company number 04909120, one of 21 plumbing and heating companies in Exmouth. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 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 Sidmarc 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 £6,192 (-10.6%) on the year before, to £52K.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £194K against £146K 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 |
|---|---|---|---|---|---|
| 31 Oct 2025 | £52K | £173K | £194K | £146K | 4 |
| 31 Oct 2024 | £59K | £183K | £217K | £160K | 3 |
| 31 Oct 2023 | £46K | £174K | £210K | £156K | 3 |
| 31 Oct 2022 | £62K | £174K | £223K | £145K | 4 |
| 31 Oct 2021 | £24K | £167K | £198K | £150K | 5 |
| 31 Oct 2020 | £8,950 | £152K | £181K | £137K | 5 |
| 31 Oct 2019 | £414 | £100K | £151K | £161K | 3 |
| 31 Oct 2018 | £5,767 | £41K | £106K | £112K | 4 |
| 31 Oct 2017 | £4,599 | £28K | £74K | £71K | 3 |
| 31 Oct 2016 | £26K | £14K | £73K | £50K |
Where Sidmarc Limited is registered
The registered office is in Exmouth (EX8), in the East Devon local authority area, South West. Show EX8 1BD on a map.
Other trade companies in EX8
- Get Works Group LtdCleaning companies
- MS Marine Services LtdMachinery repair and installation
- Elite Markings (SW) LtdCivil engineering
- Kendray LtdSpecialist contractors
- Squeak & Span Cleaning Company LtdCleaning companies
- NRS Facilities Maintenance LimitedMachinery repair and installation
- Loop Drive Motor LtdMotor traders
- Wheeldon Farm (SW) LtdBuilders
Shared registered office
67 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Sidmarc 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 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 04909120
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 September 2003 (23 years ago)
- Registered office
- 28 Alexandra Terrace, Exmouth, Devon, EX8 1BD
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 October (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 23 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 Exmouth
Other active plumbing and heating companies registered in Exmouth.
- Simon Tate Plumbing and Heating Limited2012
- The Worx Devon Limited2016
- Westmancoat Heating Limited1972
- 4 Seasons Air Conditioning Limited2008
- C J Bridle Plumbing and Heating Ltd2017
- Construct PHR Limited2024
- Daniel J Jordan Ltd2023
- DC Pipeline Ltd2019
All plumbing and heating companies in Exmouth · All trades in Exmouth · Plumbers and heating engineers across the UK
Frequently asked questions
When are Sidmarc Limited's accounts due?
Sidmarc Limited's next accounts are due at Companies House by 31 July 2027 (in 292 days), covering the period to 31 October 2026.
When is Sidmarc Limited's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is Sidmarc Limited still trading?
Sidmarc 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 Sidmarc Limited do?
Sidmarc Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Sidmarc Limited?
Sidmarc Limited was incorporated on 23 September 2003, 23 years ago.
What is the penalty if Sidmarc 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 Sidmarc 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.