- Companies
- Finishing trades
- Thornton Heath
- Sim Building Services Ltd
Sim Building Services Ltd
- Company number
- 10004310
- Incorporated
- 15 Feb 201610 years trading
- Registered office
- 57 Queenswood Avenue, Thornton Heath, CR7 7HZ
- Nature of business
- Other building completion and finishing
Sim Building Services Ltd is a 10-year-old private limited company registered in Thornton Heath, company number 10004310, one of 40 building finishing companies in Thornton Heath. Its next accounts are due at Companies House on 30 November 2026, and the CT600 for the period to 28 February 2026 is due at HMRC on 28 February 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 £108K (+26%) on the year before, to £523K.
- Net assets rose in 7 of 8 year-on-year comparisons on record.
- Current assets of £582K against £451K owed within a year: 1.3 times cover.
- 7 employees on average, up from 6 the year before.
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 28 Feb 2025 | £523K | £130K | £582K | £451K | 7 |
| 29 Feb 2024 | £415K | £14K | £621K | £401K | 6 |
| 28 Feb 2023 | £256K | £27K | £355K | £230K | 4 |
| 28 Feb 2022 | £91K | £5,639 | £159K | £103K | 3 |
| 28 Feb 2021 | £636 | £2,744 | £72K | £60K | 1 |
| 29 Feb 2020 | £3,490 | £68 | £35K | £34K | 1 |
| 28 Feb 2019 | £2,592 | £4,407 | £8,007 | £6,265 | 1 |
| 28 Feb 2018 | £1,284 | £4,552 | £14K | £14K | |
| 28 Feb 2017 | £514 | £8,502 | £15K | £16K |
Where Sim Building Services Ltd is registered
The registered office is in Thornton Heath (CR7), in the Croydon local authority area, London. Show CR7 7HZ on a map.
Other trade companies in CR7
- Ib Air Conditioning LimitedPlumbers and heating engineers
- Gold Carpet Cleaning Services LtdCleaning companies
- Azad Auto LtdMechanics and garages
- Tota Steel LtdFinishing trades
- Survey Stream Property Services LtdFacilities management
- Saunders Mechanics LtdMechanics and garages
- SR Gas London LimitedPlumbers and heating engineers
- Prestige Auto Repair & Body Works LtdMechanics and garages
Also registered at this address
1 other company uses the same registered office as Sim Building Services Ltd.
- Sim Building Solutions LtdBuilders
What happens if Sim Building Services 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 November 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Dec 2026 to 31 Dec 2026 | £150 |
| 1 to 3 months late | 1 Jan 2027 to 28 Feb 2027 | £375 |
| 3 to 6 months late | 1 Mar 2027 to 31 May 2027 | £750 |
| More than 6 months late | From 1 Jun 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Mar 2027 | £200 |
| 3 months late | 28 May 2027 | another £200 |
| 6 months late | 28 Aug 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 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
- 10004310
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 15 February 2016 (10 years ago)
- Registered office
- 57 Queenswood Avenue, Thornton Heath, CR7 7HZ
- Nature of business
- Other building completion and finishing (SIC 43390)
- Year end
- 29 February (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 28 February 2025
- Last confirmation statement
- 14 February 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 Thornton Heath
Other active building finishing companies registered in Thornton Heath.
- SKT Builders Ltd2020
- Syed Builders Ltd2020
- The Damp Company (UK) Ltd2011
- Tissy Ltd2022
- Tota Steel Ltd2026
- V-Mac Construction Limited2008
- Zaaga Properties Ltd2019
- Adr.P Ltd2021
All building finishing companies in Thornton Heath · All trades in Thornton Heath · Finishing trades across the UK
Frequently asked questions
When are Sim Building Services Ltd's accounts due?
Sim Building Services Ltd's next accounts are due at Companies House by 30 November 2026 (in 49 days), covering the period to 28 February 2026.
When is Sim Building Services Ltd's CT600 due?
The CT600 for the period to 28 February 2026 is due at HMRC by 28 February 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 December 2026.
Is Sim Building Services Ltd still trading?
Sim Building Services 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 Sim Building Services Ltd do?
Sim Building Services Ltd is registered under Other building completion and finishing (SIC 43390).
How old is Sim Building Services Ltd?
Sim Building Services Ltd was incorporated on 15 February 2016, 10 years ago.
What is the penalty if Sim Building Services 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 Sim Building Services 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.