Company profile · Builders
Sumu Construction Ltd
Sumu Construction Ltd is a 3-year-old private limited company registered in Penarth, company number 15107373, one of 23 building contractors in Penarth. Its next accounts are due at Companies House on 30 May 2027, and the CT600 for the period to 30 August 2026 is due at HMRC on 30 August 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 Sumu Construction LtdOr 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.
Financial snapshot, 2025
From the balance sheet at 31 August 2025, as filed at Companies House. Negative net assets mean the company owed more than it owned at that date.
Sumu Construction Ltd over the years
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 £7,270 on the year before, to -£7,170.
- Current assets of £70K against £78K owed within a year: 0.9 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 2 years, 2024 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | -£7,170 | £3,724 | £70K | £78K | 2 |
| 31 Aug 2024 | £100 | £100 | 2 |
Where Sumu Construction Ltd is registered
The registered office is in Penarth (CF64), in the Vale of Glamorgan local authority area, Wales. Show CF64 3EE on a map.
Other trade companies in CF64
- L Hillman Scaffolding LtdScaffolders
- Layward Projects LtdBuilders
- Vidi Aquam LtdPlumbers and heating engineers
- Ardena Property Developments LtdProperty developers
- Jet2Go Clean LtdCleaning companies
- JP Square LtdProperty developers
- Wells & Co Developments LtdInstallers
- A Grigoriou Plumbing & Heating LtdPlumbers and heating engineers
Also registered at this address
8 other companies use the same registered office as Sumu Construction Ltd.
- Ardena Property Developments LtdProperty developers
- Bolt Electrical Solutions LtdElectricians
- CBR Solutions LimitedElectricians
- Drew Peacocks LtdBuilders
- Gwernllan LtdProperty developers
- Gwernos LimitedProperty developers
- Nell's Point Barry LtdProperty developers
- Poplars Pontlliw LimitedProperty developers
What happens if Sumu Construction Ltd 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 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 31 May 2027 to 30 Jun 2027 | £150 |
| 1 to 3 months late | 1 Jul 2027 to 30 Aug 2027 | £375 |
| 3 to 6 months late | 31 Aug 2027 to 30 Nov 2027 | £750 |
| More than 6 months late | From 1 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 31 Aug 2027 | £200 |
| 3 months late | 30 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Aug 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
- 15107373
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 31 August 2023 (3 years ago)
- Registered office
- Unit B Off Edge, Station Approach, Penarth, CF64 3EE
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 30 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 30 August 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 Penarth
Other active building contractors registered in Penarth.
- Ultimate Cleaners Service Ltd2022
- Whill Construction Ltd2017
- Whill Developments Limited2024
- Ajb Property Estates Ltd2026
- Albi Homes Ltd2022
- Arnold Building and Carpentry Limited2007
- Celtic Urban Living Ltd2019
- Dean and Sons Construction Ltd2021
All building contractors in Penarth · All trades in Penarth · Builders across the UK
Frequently asked questions
When are Sumu Construction Ltd's accounts due?
Sumu Construction Ltd's next accounts are due at Companies House by 30 May 2027 (in 230 days), covering the period to 30 August 2026.
When is Sumu Construction Ltd's CT600 due?
The CT600 for the period to 30 August 2026 is due at HMRC by 30 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 31 May 2027.
Is Sumu Construction Ltd still trading?
Sumu Construction Ltd is listed as active on the Companies House register (checked 12 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 Sumu Construction Ltd do?
Sumu Construction Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is Sumu Construction Ltd?
Sumu Construction Ltd was incorporated on 31 August 2023, 3 years ago.
What is the penalty if Sumu Construction Ltd 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 Sumu Construction Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 12 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.