- Companies
- Plumbers and heating engineers
- Dartford
- Mills Mechanical Limited
Mills Mechanical Limited
- Company number
- 14505787
- Incorporated
- 25 Nov 20223 years trading
- Registered office
- 94 Watling Street, Dartford, DA2 6AF
- Nature of business
- Plumbing, heat and air-conditioning installation
Mills Mechanical Limited is a 3-year-old private limited company registered in Dartford, company number 14505787, one of 121 plumbing and heating companies in Dartford. 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 Mills Mechanical 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 £7,511 (-66.2%) on the year before, to £3,834.
- Current assets of £17K against £13K owed within a year: 1.3 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 3 years, 2023 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2025 | £3,834 | £1,308 | £17K | £13K | 0 |
| 30 Nov 2024 | £11K | £8,692 | £19K | £8,575 | 1 |
| 30 Nov 2023 | £18K | £19K | £31K | £14K | 1 |
Where Mills Mechanical Limited is registered
The registered office is in Dartford (DA2), in the Dartford local authority area, South East. Show DA2 6AF on a map.
Other trade companies in DA2
- Alija Construction LtdBuilders
- P&E Premier Holdings LimitedProperty developers
- MCP Motors LtdMechanics and garages
- Lude LtdFinishing trades
- Netti's Cleaning LtdCleaning companies
- Inspired Gardens & Landscapes Kent LtdLandscapers and gardeners
- Elite FM LimitedFacilities management
- Cleansl8 LtdCleaning companies
What happens if Mills Mechanical 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 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
- 14505787
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 November 2022 (3 years ago)
- Registered office
- 94 Watling Street, Dartford, DA2 6AF
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 30 November (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 5 April 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 Dartford
Other active plumbing and heating companies registered in Dartford.
- MJV Gas & Heating Ltd2016
- Momentum Building Services Engineering Limited2016
- MS Refrigeration and Building Services Limited2024
- Myron Homes Group Ltd2025
- N8 Ductwork Limited2025
- NCK Pest Proofing and Property Maintenance Solutions Ltd2024
- Newtons Plumbing Services Ltd2015
- Nicholson Gas Services Limited2026
All plumbing and heating companies in Dartford · All trades in Dartford · Plumbers and heating engineers across the UK
Frequently asked questions
When are Mills Mechanical Limited's accounts due?
Mills Mechanical Limited's next accounts are due at Companies House by 31 August 2027 (in 322 days), covering the period to 30 November 2026.
When is Mills Mechanical Limited'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 Mills Mechanical Limited still trading?
Mills Mechanical 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 Mills Mechanical Limited do?
Mills Mechanical Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Mills Mechanical Limited?
Mills Mechanical Limited was incorporated on 25 November 2022, 3 years ago.
What is the penalty if Mills Mechanical 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 Mills Mechanical 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.