- Company number
- 11094217
- Incorporated
- 4 Dec 20178 years trading
- Registered office
- 99 Bury Street, Ruislip, HA4 7TF
- Nature of business
- Construction of commercial buildings
D H Mechanical Limited is a 8-year-old private limited company registered in Ruislip, company number 11094217, one of 161 building contractors in Ruislip. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 2027.
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 £2,191 (+121.2%) on the year before, to £3,999.
- Net assets rose in 3 of 7 year-on-year comparisons on record.
- Current assets of £21K against £15K owed within a year: 1.4 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 8 years, 2018 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £3,999 | £2,047 | £21K | £15K | 1 |
| 31 Dec 2024 | £1,808 | £17K | £16K | 1 | |
| 31 Dec 2023 | £3,975 | £13K | £14K | 1 | |
| 31 Dec 2022 | £2,598 | £17K | £16K | 1 | |
| 31 Dec 2021 | £7,473 | £22K | £17K | 1 | |
| 31 Dec 2020 | £13K | £19K | £10K | 1 | |
| 31 Dec 2019 | £6,889 | £284 | £22K | 1 | |
| 31 Dec 2018 | £8,783 | £5,383 |
Where D H Mechanical Limited is registered
The registered office is in Ruislip (HA4), in the Hillingdon local authority area, London. Show HA4 7TF on a map.
Other trade companies in HA4
- SSC London LtdGroundworks and demolition
- DCR Industriltdal LtdPainters and decorators
- Katardino Monten for General Contracting and Supplies LtdCivil engineering
- Apex Build & Move LtdBuilders
- Ridgeway Building Contracts LimitedProperty developers
- Azya Farah LtdBuilders
- Howdens Roofing & Guttering LimitedRoofers
- Vetro Glazing LimitedGlaziers
What happens if D H 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 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 11094217
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 December 2017 (8 years ago)
- Registered office
- 99 Bury Street, Ruislip, HA4 7TF
- Nature of business
- Construction of commercial buildings (SIC 41201)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 22 October 2025
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Ruislip
Other active building contractors registered in Ruislip.
- Damian Construction Limited2023
- Danny BS Ltd2025
- Dibrix Group Ltd2025
- Dream PB Construction Ltd2018
- Dreamland Group Ltd2024
- Dreamland Roofing Ltd2024
- Dudman Construction Limited2013
- DZ Skyline Development Ltd2025
All building contractors in Ruislip · All trades in Ruislip · Builders across the UK
Frequently asked questions
When are D H Mechanical Limited's accounts due?
D H Mechanical Limited's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is D H Mechanical Limited's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is D H Mechanical Limited still trading?
D H 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 D H Mechanical Limited do?
D H Mechanical Limited is registered under Construction of commercial buildings (SIC 41201).
How old is D H Mechanical Limited?
D H Mechanical Limited was incorporated on 4 December 2017, 8 years ago.
What is the penalty if D H 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 D H 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.