- Companies
- Civil engineering
- Doncaster
- Prima Mechanical Services Limited
Prima Mechanical Services Limited
- Company number
- 06627533
- Incorporated
- 23 Jun 200818 years trading
- Registered office
- 35 Thorne Road, Doncaster, DN1 2HD
- Nature of business
- Construction of other civil engineering projects n.e.c.
Prima Mechanical Services Limited is a 18-year-old private limited company registered in Doncaster, company number 06627533, one of 170 civil engineering contractors in Doncaster. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 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 Prima Mechanical Services 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 £45K (-117.6%) on the year before, to -£6,744.
- Net assets rose in 2 of 9 year-on-year comparisons on record.
- Current assets of £83K against £131K owed within a year: 0.6 times cover.
- 4 employees on average during the year.
- 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 |
|---|---|---|---|---|---|
| 30 Jun 2025 | -£6,744 | £5,092 | £83K | £131K | 4 |
| 30 Jun 2024 | £38K | £811 | £158K | £154K | 4 |
| 30 Jun 2023 | £52K | £30K | £217K | £194K | 4 |
| 30 Jun 2022 | £23K | £28 | £126K | £109K | 4 |
| 30 Jun 2021 | £52K | £441 | £125K | £87K | 10 |
| 30 Jun 2020 | £102K | £508 | £183K | £110K | 10 |
| 30 Jun 2019 | £138K | £384 | £208K | £118K | 10 |
| 30 Jun 2018 | £150K | £305K | £209K | 0 | |
| 30 Jun 2017 | £148K | £84 | £257K | £161K | 9 |
| 30 Jun 2016 | £170K | £65 | £343K | £211K |
Where Prima Mechanical Services Limited is registered
The registered office is in Doncaster (DN1), in the Doncaster local authority area, Yorkshire and The Humber. Show DN1 2HD on a map.
Other trade companies in DN1
- Nacu Trans LtdMechanics and garages
- Highwind Developments LimitedFinishing trades
- Adzare Service LtdMechanics and garages
- Sukaj Construction LtdPlasterers
- Tobityres LimitedMechanics and garages
- Firmont Homes LtdBuilders
- Callerton Autos LtdMotor traders
- S & A Motor Vehicles LimitedMotor traders
Also registered at this address
17 other companies use the same registered office as Prima Mechanical Services Limited.
- A D R Homes LimitedBuilders
- Analogue Electrics LimitedElectricians
- At Dry Lining Systems LtdSpecialist contractors
- Brackenfield Developments LtdBuilders
- Colwill Contracting LimitedCivil engineering
- D.D-R. Joinery LimitedJoiners and carpenters
- Ecovolt Solar Installations LtdElectricians
- Hallmark Developments (Yorkshire) LimitedProperty developers
- Homenumber Property Management LimitedProperty developers
- Hycross (Garage Services) LtdMechanics and garages
- Jakto Excavations LtdGroundworks and demolition
- Kingswood Restoration LimitedPainters and decorators
- Mason Electrical Services LimitedElectricians
- Oaklands Property Solutions LtdProperty developers
- Select Electrical (GB) LimitedElectricians
- Skidmore Electrical (UK) LtdElectricians
- Steve Hobson Building & Joinery LtdBuilders
What happens if Prima Mechanical 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 31 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 06627533
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 June 2008 (18 years ago)
- Registered office
- 35 Thorne Road, Doncaster, DN1 2HD
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 18 July 2026
- Charges (mortgages)
- 1 outstanding of 1 registered
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Doncaster
Other active civil engineering contractors registered in Doncaster.
- Pritchard Management Ltd2025
- Pro Aspire Rail and Construction Training Ltd2018
- Professional Rail Services Ltd2022
- Prospect Dariusz Dachtera Limited2009
- PTC Services Ltd2023
- Quantum Traffic Management (Eastern) Ltd2024
- R Rail Limited2011
- R Turton Ltd2022
All civil engineering contractors in Doncaster · All trades in Doncaster · Civil engineering across the UK
Frequently asked questions
When are Prima Mechanical Services Limited's accounts due?
Prima Mechanical Services Limited's next accounts are due at Companies House by 31 March 2027 (in 170 days), covering the period to 30 June 2026.
When is Prima Mechanical Services Limited's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is Prima Mechanical Services Limited still trading?
Prima Mechanical 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 Prima Mechanical Services Limited do?
Prima Mechanical Services Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Prima Mechanical Services Limited?
Prima Mechanical Services Limited was incorporated on 23 June 2008, 18 years ago.
What is the penalty if Prima Mechanical 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 Prima Mechanical 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.