- Companies
- Finishing trades
- Croydon
- Simplex Building & Maintenance Limited
Simplex Building & Maintenance Limited
- Company number
- 11603491
- Incorporated
- 3 Oct 20188 years trading
- Registered office
- 792 Wickham Road, Croydon, Surrey, CR0 8EA
- Nature of business
- Other building completion and finishing
Simplex Building & Maintenance Limited is a 8-year-old private limited company registered in Croydon, company number 11603491, one of 143 building finishing companies in Croydon. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 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 £2,432 (-34.9%) on the year before, to £4,541.
- Net assets rose in 4 of 6 year-on-year comparisons on record.
- Current assets of £11K against £3,919 owed within a year: 2.7 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 7 years, 2019 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Oct 2025 | £4,541 | £11K | £3,919 | 2 | |
| 31 Oct 2024 | £6,973 | £12K | £2,921 | 2 | |
| 31 Oct 2023 | £188 | £12K | £3,452 | 4 | |
| 31 Oct 2022 | £1,168 | £23K | £11K | 5 | |
| 31 Oct 2021 | £935 | £25K | £13K | 1 | |
| 31 Oct 2020 | £259 | £14K | £694 | 1 | |
| 31 Oct 2019 | £5 | £495 | £490 | 2 |
Where Simplex Building & Maintenance Limited is registered
The registered office is in Croydon (CR0), in the Croydon local authority area, London. Show CR0 8EA on a map.
Other trade companies in CR0
- Linx Render LimitedBuilders
- Horus Properly Renovation LimitedBuilders
- Auto & Repairs London LtdMotor traders
- Diyour-Self LtdFloor and wall tilers
- Premier Kitchen Installations LimitedJoiners and carpenters
- VR1 Construct LtdBuilders
- Simply Exterior Solutions LimitedCleaning companies
- Kok Cons LtdBuilders
Shared registered office
39 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Simplex Building & Maintenance 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 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 11603491
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 3 October 2018 (8 years ago)
- Registered office
- 792 Wickham Road, Croydon, Surrey, CR0 8EA
- Nature of business
- Other building completion and finishing (SIC 43390)
- Year end
- 31 October (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 20 July 2026
Filing notes for building finishing companies
Finishing trade companies cover a wide range of work. Most are micro-entities with simple accounts and a straightforward CT600.
Similar companies in Croydon
Other active building finishing companies registered in Croydon.
- Southern Industrial Pipeline Services Limited1999
- Southern Mechanical Services Limited2007
- Stonemetrics Ltd2026
- Svetlin & Viktor Decorating Ltd2020
- Swavovski Ltd2012
- T Garland Building Services Ltd2006
- T.Raychev-Building Services Limited2007
- Tanahu Limited2025
All building finishing companies in Croydon · All trades in Croydon · Finishing trades across the UK
Frequently asked questions
When are Simplex Building & Maintenance Limited's accounts due?
Simplex Building & Maintenance Limited's next accounts are due at Companies House by 31 July 2027 (in 292 days), covering the period to 31 October 2026.
When is Simplex Building & Maintenance Limited's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is Simplex Building & Maintenance Limited still trading?
Simplex Building & Maintenance 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 Simplex Building & Maintenance Limited do?
Simplex Building & Maintenance Limited is registered under Other building completion and finishing (SIC 43390).
How old is Simplex Building & Maintenance Limited?
Simplex Building & Maintenance Limited was incorporated on 3 October 2018, 8 years ago.
What is the penalty if Simplex Building & Maintenance 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 Simplex Building & Maintenance 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.