- Companies
- Installers
- Harrow
- Sab CST Ltd
Company profile · Installers
Sab CST Ltd
Sab CST Ltd is a 10-year-old private limited company registered in Harrow, company number 10312372, one of 130 installation companies (insulation, lifts, shutters and similar) in Harrow. Its next accounts are due at Companies House on 31 May 2028, and the CT600 for the period to 31 August 2027 is due at HMRC on 31 August 2028.
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 Sab CST 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.
Financial snapshot, 2026
From the balance sheet at 31 August 2026, as filed at Companies House.
Sab CST Ltd over the years
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 £8,945 (+115%) on the year before, to £1,165.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £18K against £49K owed within a year: 0.4 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 10 years, 2017 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2026 | £1,165 | £1,673 | £18K | £49K | 3 |
| 31 Aug 2025 | -£7,780 | £11K | £38K | £41K | 3 |
| 31 Aug 2024 | £359 | £1,300 | £26K | £30K | 4 |
| 31 Aug 2023 | £194 | £10K | £33K | £27K | 4 |
| 31 Aug 2022 | -£1,708 | £5,654 | £35K | £1,515 | 2 |
| 31 Aug 2021 | £2,867 | £14K | £81K | £34K | 2 |
| 31 Aug 2020 | £67 | £18K | £26K | £27K | 0 |
| 31 Aug 2019 | £5 | £86K | £94K | £97K | |
| 31 Aug 2018 | £2 | £28K | £34K | £34K | |
| 31 Aug 2017 | £1 | £12K | £12K |
Where Sab CST Ltd is registered
The registered office is in Harrow (HA1), in the Harrow local authority area, London. Show HA1 1BH on a map.
Other trade companies in HA1
- Cabos Electrical LimitedElectricians
- Mia Maria Services LtdCleaning companies
- Ac Operations LtdScaffolders
- Verde Masters LtdLandscapers and gardeners
- Omega Works Group LtdLandscapers and gardeners
- Call 'Em LimitedPlumbers and heating engineers
- Swan Roofing Services LimitedRoofers
- DRV Property Solutions LtdPainters and decorators
Shared registered office
32 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 Sab CST 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 May 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jun 2028 to 30 Jun 2028 | £150 |
| 1 to 3 months late | 1 Jul 2028 to 31 Aug 2028 | £375 |
| 3 to 6 months late | 1 Sep 2028 to 30 Nov 2028 | £750 |
| More than 6 months late | From 1 Dec 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2028 | £200 |
| 3 months late | 30 Nov 2028 | another £200 |
| 6 months late | 28 Feb 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 2029 | 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
- 10312372
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 August 2016 (10 years ago)
- Registered office
- 166 College Road, Harrow, HA1 1BH
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2026
- Last confirmation statement
- 21 August 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 Harrow
Other active installation companies (insulation, lifts, shutters and similar) registered in Harrow.
- Sarunas Klimavicius Joinery Ltd2019
- Sealway Limited2005
- Shobby Construct Ltd2025
- Shutter Your House Limited2019
- SLF Locksmiths and Carpentry Ltd2022
- SSG Builders Ltd2015
- SSV Built Ltd2024
- Stone Worktop Surfaces Ltd2026
All installation companies (insulation, lifts, shutters and similar) in Harrow · All trades in Harrow · Installers across the UK
Frequently asked questions
When are Sab CST Ltd's accounts due?
Sab CST Ltd's next accounts are due at Companies House by 31 May 2028 (in 597 days), covering the period to 31 August 2027.
When is Sab CST Ltd's CT600 due?
The CT600 for the period to 31 August 2027 is due at HMRC by 31 August 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 June 2028.
Is Sab CST Ltd still trading?
Sab CST 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 Sab CST Ltd do?
Sab CST Ltd is registered under Other construction installation (SIC 43290).
How old is Sab CST Ltd?
Sab CST Ltd was incorporated on 4 August 2016, 10 years ago.
What is the penalty if Sab CST 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 Sab CST 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.