- Company number
- 15161120
- Incorporated
- 25 Sep 20233 years trading
- Registered office
- 77 Bute Street, Treorchy, Mid Glamorgan, CF42 6AH
- Nature of business
- Roofing activities
Sej Roofing Ltd is a 3-year-old private limited company registered in Treorchy, company number 15161120, one of 6 roofing companies in Treorchy. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 £46K (+118.8%) on the year before, to £84K.
- Current assets of £136K against £73K owed within a year: 1.9 times cover.
- 3 employees on average, up from 0 the year before.
- 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 Mar 2025 | £84K | £136K | £73K | 3 | |
| 31 Mar 2024 | £38K | £50K | £18K | 0 |
Where Sej Roofing Ltd is registered
The registered office is in Treorchy (CF42), in the Rhondda Cynon Taf local authority area, Wales. Show CF42 6AH on a map.
Other trade companies in CF42
- Eagle.Pro.Roofing.UK. LtdRoofers
- Valley Flooring LtdFloor and wall tilers
- LL Property Partners LtdProperty developers
- A1 Lifting Operations LimitedCivil engineering
- Lewys Electrical LtdElectricians
- Pro-Renovate LtdProperty developers
- A & K Plastering and Rendering LtdBuilders
- Treorchy Hand Carwash 1 LtdCleaning companies
Also registered at this address
22 other companies use the same registered office as Sej Roofing Ltd.
- A Helping Hand Commercial Cleaning LimitedCleaning companies
- CDJ Electrical LtdElectricians
- Concept Carpentry Services LimitedInstallers
- Coresafe Environmental LimitedSpecialist contractors
- Ebt Drylining LtdFinishing trades
- G Richards Builders LtdSpecialist contractors
- Hughes Brothers Roofing LtdRoofers
- Iri Reinforcements & Concrete LimitedCivil engineering
- Jay Hughes Roofing Solutions LimitedRoofers
- K2 Resin Specialists LimitedSpecialist contractors
- Kes Electrical Services South Wales LimitedElectricians
- Lewis.Plumbing.Heating LtdPlumbers and heating engineers
- MDS Heating Installations LimitedElectricians
- MOT & Auto Centre LtdMechanics and garages
- NCJ Drylining LtdPlasterers
- Premier Insulation & Building Treatments LimitedSpecialist contractors
- Pro Renewable UK LtdInstallers
- Pro-Renovate LtdProperty developers
- South Wales Vent Systems LtdInstallers
- TG Scaffolding (Pontypridd) LtdScaffolders
- The Win-Door Avenue LtdGlaziers
- Watts Scaffolding Services SW LimitedScaffolders
What happens if Sej Roofing 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 31 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 15161120
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 25 September 2023 (3 years ago)
- Registered office
- 77 Bute Street, Treorchy, Mid Glamorgan, CF42 6AH
- Nature of business
- Roofing activities (SIC 43910)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 5 September 2026
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 Treorchy
Other active roofing companies registered in Treorchy.
- CDW Cladding Systems Ltd2024
- Eagle.Pro.Roofing.UK. Ltd2026
- Hughes Brothers Roofing Ltd2012
- Jay Hughes Roofing Solutions Limited2026
- Onyxx Roofing & Solar Limited2025
All roofing companies in Treorchy · All trades in Treorchy · Roofers across the UK
Frequently asked questions
When are Sej Roofing Ltd's accounts due?
Sej Roofing Ltd's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Sej Roofing Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Sej Roofing Ltd still trading?
Sej Roofing Ltd 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 Sej Roofing Ltd do?
Sej Roofing Ltd is registered under Roofing activities (SIC 43910).
How old is Sej Roofing Ltd?
Sej Roofing Ltd was incorporated on 25 September 2023, 3 years ago.
What is the penalty if Sej Roofing 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 Sej Roofing Ltd 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.