- Company number
- 03880121
- Incorporated
- 19 Nov 199926 years trading
- Registered office
- 11 Bradford Row, Doncaster, DN1 3NF
- Nature of business
- Roofing activities; Other specialised construction activities n.e.c.
Planetalpha Limited is a 26-year-old private limited company registered in Doncaster, company number 03880121, one of 77 roofing companies in Doncaster. Its next accounts are due at Companies House on 30 April 2027, and the CT600 for the period to 31 July 2026 is due at HMRC on 31 July 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 £768K (+60%) on the year before, to £2M.
- Net assets rose in 7 of 7 year-on-year comparisons on record.
- Current assets of £3.5M against £1.5M owed within a year: 2.3 times cover.
- 6 employees on average, up from 5 the year before.
- 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 Jul 2025 | £2M | £772K | £3.5M | £1.5M | 6 |
| 31 Jul 2024 | £1.3M | £321K | £1.6M | £861K | 5 |
| 30 Apr 2023 | £1M | £484K | £1.7M | £666K | 6 |
| 30 Apr 2022 | £832K | £801K | £2M | £1.1M | 6 |
| 30 Apr 2021 | £616K | £604K | £945K | £293K | 6 |
| 30 Apr 2020 | £451K | £247K | £722K | £286K | 6 |
| 30 Apr 2019 | £356K | £279K | £618K | £223K | |
| 30 Apr 2018 | £226K | £46K | £348K | £104K |
Public contracts won
Planetalpha Limited has one public sector contract award on record (2021). Source: Contracts Finder and Find a Tender award notices. For all of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| LHC on behalf of the Scottish Procurement Alliance (SPA) | Design, Supply and Installation of Roofing and Associated Works | Ceiling, not shown | 11 May 2021 |
Where Planetalpha Limited is registered
The registered office is in Doncaster (DN1), in the Doncaster local authority area, Yorkshire and The Humber. Show DN1 3NF 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
23 other companies use the same registered office as Planetalpha Limited.
- Adt Joinery LtdJoiners and carpenters
- Alpha Development Management Solutions LtdProperty developers
- Blansco LtdProperty developers
- Claylane Brickwork LimitedBuilders
- Claylane Construction LtdBuilders
- Co Site Services LtdSpecialist contractors
- Doncaster Groundworks & Reinforcements LtdCivil engineering
- G I Fabrication (Doncaster) LtdSpecialist contractors
- Ground-Tec Construction LtdCivil engineering
- K4 Construction LimitedBuilders
- Keys 123 LimitedMotor traders
- KH Plumbing & Heating Services LtdPlumbers and heating engineers
- KLC Plastering LtdPlasterers
- Lewis Brothers Electrical LimitedElectricians
- MRP Automotive (Yorkshire) LimitedMechanics and garages
- NM Property London LtdProperty developers
- One Stop Scaffolding & Netting Services LimitedScaffolders
- Poppies (U.K.) Development LimitedCleaning companies
- Sandall Heating Services LtdPlumbers and heating engineers
- Steel Construction (Yorkshire) LimitedCivil engineering
- Stollery Plant & Commercial Sales LimitedMotor traders
- Strand Multiserve LtdCleaning companies
- WMJ Drilling LtdPlumbers and heating engineers
What happens if Planetalpha 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 April 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 May 2027 to 31 May 2027 | £150 |
| 1 to 3 months late | 1 Jun 2027 to 31 Jul 2027 | £375 |
| 3 to 6 months late | 1 Aug 2027 to 31 Oct 2027 | £750 |
| More than 6 months late | From 1 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Aug 2027 | £200 |
| 3 months late | 31 Oct 2027 | another £200 |
| 6 months late | 31 Jan 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jul 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
- 03880121
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 November 1999 (26 years ago)
- Registered office
- 11 Bradford Row, Doncaster, DN1 3NF
- Nature of business
- Roofing activities (SIC 43910)
Other specialised construction activities n.e.c. (SIC 43999) - Year end
- 31 July (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 July 2025
- Last confirmation statement
- 29 October 2025
- Charges (mortgages)
- 1 outstanding of 1 registered
Filing notes for roofing companies
Roofing companies commonly work under CIS and run vans and access equipment, so CIS deductions and capital allowances are the two things to get right.
Similar companies in Doncaster
Other active roofing companies registered in Doncaster.
- R W Cladding Limited2022
- R. Roofing Limited2024
- R4Ecobuild Ltd2025
- RCT Eps Ltd2026
- RD Structures Ltd2023
- Ridgeline Roofing Services (Doncaster) Limited2024
- RJ Roofing Services Ltd2023
- Roof Serve Ltd2020
All roofing companies in Doncaster · All trades in Doncaster · Roofers across the UK
Frequently asked questions
When are Planetalpha Limited's accounts due?
Planetalpha Limited's next accounts are due at Companies House by 30 April 2027 (in 200 days), covering the period to 31 July 2026.
When is Planetalpha Limited's CT600 due?
The CT600 for the period to 31 July 2026 is due at HMRC by 31 July 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 May 2027.
Is Planetalpha Limited still trading?
Planetalpha 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 Planetalpha Limited do?
Planetalpha Limited is registered under Roofing activities (SIC 43910); Other specialised construction activities n.e.c. (SIC 43999).
How old is Planetalpha Limited?
Planetalpha Limited was incorporated on 19 November 1999, 26 years ago.
Has Planetalpha Limited won public sector contracts?
Yes. Planetalpha Limited has one contract award from public bodies on Contracts Finder and Find a Tender, most recently from LHC on behalf of the Scottish Procurement Alliance (SPA).
What is the penalty if Planetalpha 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 Planetalpha 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.