- Companies
- Plumbers and heating engineers
- Cobham
- Prime Mechanical Limited
Prime Mechanical Limited
- Company number
- 10170243
- Incorporated
- 9 May 201610 years trading
- Registered office
- The Long Barn Cobham Park Road, Downside, Cobham, KT11 3NE
- Nature of business
- Plumbing, heat and air-conditioning installation
Prime Mechanical Limited is a 10-year-old private limited company registered in Cobham, company number 10170243, one of 11 plumbing and heating companies in Cobham. Its next accounts are due at Companies House on 29 February 2028, and the CT600 for the period to 31 May 2027 is due at HMRC on 31 May 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 £47K (+52.8%) on the year before, to £136K.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £285K against £174K owed within a year: 1.6 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 10 years, 2017 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2026 | £136K | £73K | £285K | £174K | 3 |
| 31 May 2025 | £89K | £53K | £276K | £159K | 3 |
| 31 May 2024 | £38K | £34K | £127K | £78K | 1 |
| 31 May 2023 | £76K | £24K | £239K | £149K | 3 |
| 31 May 2022 | £13K | £208K | £164K | 1 | |
| 31 May 2021 | £58 | £47K | £48K | 1 | |
| 31 May 2020 | £32 | £46K | £46K | 1 | |
| 31 May 2019 | £7,192 | £20K | £12K | ||
| 31 May 2018 | £1 | £13K | £13K | ||
| 31 May 2017 | £439 | £4,384 | £3,945 |
Where Prime Mechanical Limited is registered
The registered office is in Cobham (KT11), in the Elmbridge local authority area, South East. Show KT11 3NE on a map.
Other trade companies in KT11
- Rocco Great Dunmow LimitedProperty developers
- Dream Team Cleaning LtdCleaning companies
- As Construction Services LtdProperty developers
- Shiells Property Development LtdProperty developers
- Middlemass James LimitedProperty developers
- 2H2C LtdFinishing trades
- Petrol Legends LimitedMotor traders
- Daneshill Homes LimitedProperty developers
Also registered at this address
14 other companies use the same registered office as Prime Mechanical Limited.
- Axe Group LimitedFinishing trades
- Darby Holmes LtdProperty developers
- Faith & Maxwell Construction LtdProperty developers
- General Renovations LimitedBuilders
- GPS Facilities LtdInstallers
- Homes & Builders LtdBuilders
- J&T Design and Build LimitedProperty developers
- LS Builders LtdBuilders
- Mesh Systems Europe LimitedElectricians
- Metroduct LtdPlumbers and heating engineers
- Qltqnt LtdProperty developers
- Selwood Projects LtdProperty developers
- WTM Construction LtdProperty developers
- Wyndham Property Group LimitedProperty developers
What happens if Prime 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 29 February 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2028 to 31 Mar 2028 | £150 |
| 1 to 3 months late | 1 Apr 2028 to 31 May 2028 | £375 |
| 3 to 6 months late | 1 Jun 2028 to 31 Aug 2028 | £750 |
| More than 6 months late | From 1 Sep 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2028 | £200 |
| 3 months late | 31 Aug 2028 | another £200 |
| 6 months late | 30 Nov 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 10170243
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 May 2016 (10 years ago)
- Registered office
- The Long Barn Cobham Park Road, Downside, Cobham, KT11 3NE
- Nature of business
- Plumbing, heat and air-conditioning installation (SIC 43220)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2026
- Last confirmation statement
- 8 May 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 Cobham
Other active plumbing and heating companies registered in Cobham.
- V-Mech Limited2021
- Virtue Heating and Cooling Limited2021
- Capes Plumbing Limited2022
- Harris&Shepherd Plumbing&Heating Solutions Limited2017
- Hybone Ltd2025
- KT Gas Ltd2014
- M Rollins Plumbing & Heating Limited2012
- Metroduct Ltd2022
All plumbing and heating companies in Cobham · All trades in Cobham · Plumbers and heating engineers across the UK
Frequently asked questions
When are Prime Mechanical Limited's accounts due?
Prime Mechanical Limited's next accounts are due at Companies House by 29 February 2028 (in 505 days), covering the period to 31 May 2027.
When is Prime Mechanical Limited's CT600 due?
The CT600 for the period to 31 May 2027 is due at HMRC by 31 May 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2028.
Is Prime Mechanical Limited still trading?
Prime 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 Prime Mechanical Limited do?
Prime Mechanical Limited is registered under Plumbing, heat and air-conditioning installation (SIC 43220).
How old is Prime Mechanical Limited?
Prime Mechanical Limited was incorporated on 9 May 2016, 10 years ago.
What is the penalty if Prime 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 Prime 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.