- Companies
- Installers
- Mitcham
- Carlos Serrao Building Services Limited
Carlos Serrao Building Services Limited
- Company number
- 05847462
- Incorporated
- 15 Jun 200620 years trading
- Registered office
- 18 Worcester Close, Mitcham, Surrey, CR4 1SP
- Nature of business
- Other construction installation
Carlos Serrao Building Services Limited is a 20-year-old private limited company registered in Mitcham, company number 05847462, one of 37 installation companies (insulation, lifts, shutters and similar) in Mitcham. 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.
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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 down £4,092 (-1.1%) on the year before, to £365K.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- Current assets of £62K against £236K owed within a year: 0.3 times cover.
- 2 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 | £365K | £62K | £236K | 2 | |
| 30 Jun 2024 | £369K | £95K | £434K | 2 | |
| 30 Jun 2023 | £315K | £47K | £445K | 2 | |
| 30 Jun 2022 | £228K | £234K | £24K | 2 | |
| 30 Jun 2021 | £176K | £176K | £18K | 2 | |
| 30 Jun 2020 | £158K | £145K | £8,163 | 2 | |
| 30 Jun 2019 | £194K | £194K | £10K | ||
| 30 Jun 2018 | £198K | £225K | £29K | ||
| 30 Jun 2017 | £147K | £180K | £35K | ||
| 30 Jun 2016 | £83K | £120K | £29K |
Where Carlos Serrao Building Services Limited is registered
The registered office is in Mitcham (CR4), in the Merton local authority area, London. Show CR4 1SP on a map.
Other trade companies in CR4
- Mendevo LimitedFloor and wall tilers
- Az Auto Body Repair LtdMechanics and garages
- Welcome Maintenance LimitedPainters and decorators
- Fixmot LtdMechanics and garages
- MPB Property Care LtdFinishing trades
- Aoo Building Services LtdBuilders
- LDN Plumbing Heating and Cooling LimitedPlumbers and heating engineers
- Dgha Construction LtdBuilders
What happens if Carlos Serrao Building 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
- 05847462
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 15 June 2006 (20 years ago)
- Registered office
- 18 Worcester Close, Mitcham, Surrey, CR4 1SP
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 30 June (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 15 June 2026
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in Mitcham
Other active installation companies (insulation, lifts, shutters and similar) registered in Mitcham.
- Claz Building Limited2019
- Coonan Concrete Pumping Limited2001
- Eaman Building Services Limited2019
- G&P Facades Limited2025
- Grand Finish Ltd2012
- Green Link Energy Services Ltd2021
- Igt Lift Ltd2017
- Interior Tec Limited2012
All installation companies (insulation, lifts, shutters and similar) in Mitcham · All trades in Mitcham · Installers across the UK
Frequently asked questions
When are Carlos Serrao Building Services Limited's accounts due?
Carlos Serrao Building Services Limited's next accounts are due at Companies House by 31 March 2027 (in 168 days), covering the period to 30 June 2026.
When is Carlos Serrao Building 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 Carlos Serrao Building Services Limited still trading?
Carlos Serrao Building 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 Carlos Serrao Building Services Limited do?
Carlos Serrao Building Services Limited is registered under Other construction installation (SIC 43290).
How old is Carlos Serrao Building Services Limited?
Carlos Serrao Building Services Limited was incorporated on 15 June 2006, 20 years ago.
What is the penalty if Carlos Serrao Building 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 Carlos Serrao Building 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.