- Company number
- 15180050
- Incorporated
- 2 Oct 20233 years trading
- Registered office
- 29 Calverton Road, London, E6 2NS
- Nature of business
- Construction of commercial buildings; Construction of domestic buildings; General cleaning of buildings
Seraphin Building Ltd is a 3-year-old private limited company registered in London, company number 15180050, one of 12,075 building contractors in London. Companies House shows its accounts as overdue: they were due on 31 July 2026.
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 Seraphin Building 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.
Where Seraphin Building Ltd is registered
The registered office is in London (E6), in the Newham local authority area, London. Show E6 2NS on a map.
Other trade companies in E6
- Dabostech LtdProperty developers
- Ryanlyn LimitedCleaning companies
- Benjamin's Decorating Services LimitedSpecialist contractors
- Wexstons C LtdRepair services
- Ramya Motors LtdMotor traders
- Nil Art Decor LtdBuilders
- Ari & Bleri LtdBuilders
- Gorgos Electrical Services LtdElectricians
What happens if Seraphin Building Ltd files late
If the accounts reach Companies House today, the late filing penalty is £375 (£750 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2026 to 31 Aug 2026 | £150 |
| 1 to 3 months late | 1 Sep 2026 to 31 Oct 2026 | £375 |
| 3 to 6 months late | 1 Nov 2026 to 31 Jan 2027 | £750 |
| More than 6 months late | From 1 Feb 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2026 | £200 |
| 3 months late | 31 Jan 2027 | another £200 |
| 6 months late | 30 Apr 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 2027 | 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
- 15180050
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 2 October 2023 (3 years ago)
- Registered office
- 29 Calverton Road, London, E6 2NS
- Nature of business
- Construction of commercial buildings (SIC 41201)
Construction of domestic buildings (SIC 41202)
General cleaning of buildings (SIC 81210) - Year end
- 31 October (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 October 2024
- Last confirmation statement
- 4 July 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 London
Other active building contractors registered in London.
- Serdrik Concept Ltd2017
- Serforce Limited2006
- Sergiu Stefan Ltd2024
- Sergyo Constructions Ltd2017
- Serhiy Construction Limited2025
- Serlin Ltd2022
- Service Management CTPR Limited2024
- Services Pezda Limited2024
All building contractors in London · All trades in London · Builders across the UK
Frequently asked questions
When are Seraphin Building Ltd's accounts due?
Seraphin Building Ltd's accounts were due at Companies House on 31 July 2026 and the register shows them as overdue.
When is Seraphin Building Ltd's CT600 due?
The CT600 for the period to 31 October 2025 is due at HMRC by 31 October 2026, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2026.
Is Seraphin Building Ltd still trading?
Seraphin Building Ltd is listed as active on the Companies House register (checked 13 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 Seraphin Building Ltd do?
Seraphin Building Ltd is registered under Construction of commercial buildings (SIC 41201); Construction of domestic buildings (SIC 41202); General cleaning of buildings (SIC 81210).
How old is Seraphin Building Ltd?
Seraphin Building Ltd was incorporated on 2 October 2023, 3 years ago.
What is the penalty if Seraphin Building 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 Seraphin Building Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.