- Companies
- Specialist contractors
- London
- Squarebrick Limited
Company profile · Specialist contractors
Squarebrick Limited
Squarebrick Limited is a 10-year-old private limited company registered in London, company number 10079877, one of 4,318 specialist construction companies in London. Its next accounts are due at Companies House on 29 June 2027, and the CT600 for the period to 29 September 2026 is due at HMRC on 29 September 2027.
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 Squarebrick LimitedOr 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, 2025
From the balance sheet at 30 September 2025, as filed at Companies House.
Squarebrick Limited 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 £229 (+36.9%) on the year before, to £850.
- Net assets rose in 5 of 8 year-on-year comparisons on record.
- Current assets of £22K against £22K owed within a year: 1.0 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- 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 |
|---|---|---|---|---|---|
| 30 Sep 2025 | £850 | £22K | £22K | 0 | |
| 30 Sep 2024 | £621 | £16K | £15K | 2 | |
| 30 Sep 2023 | £102 | £17K | £17K | 2 | |
| 30 Sep 2022 | £296 | £22K | £22K | 2 | |
| 30 Sep 2021 | £772 | £13K | £12K | 2 | |
| 30 Sep 2020 | £322 | £8,967 | £8,645 | 2 | |
| 30 Sep 2019 | £271 | £10K | £10K | 2 | |
| 30 Sep 2018 | £100 | ||||
| 31 Mar 2017 | £100 |
Where Squarebrick Limited is registered
The registered office is in London (EC2A), in the Islington local authority area, London. Show EC2A 4LU on a map.
Other trade companies in EC2A
- Simlan Management LtdCleaning companies
- Renova Secure LtdBuilders
- Auraglasspartitions LtdGlaziers
- A2D Professional Cleaning LtdCleaning companies
- Matson Co. LtdProperty developers
- Paint Hub LimitedMechanics and garages
- SJK Construction & Management LtdBuilders
- Cenlora Cleaning Group LtdCleaning companies
Shared registered office
74 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 Squarebrick 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 29 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 30 Jun 2027 to 29 Jul 2027 | £150 |
| 1 to 3 months late | 30 Jul 2027 to 29 Sep 2027 | £375 |
| 3 to 6 months late | 30 Sep 2027 to 29 Dec 2027 | £750 |
| More than 6 months late | From 30 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 30 Sep 2027 | £200 |
| 3 months late | 29 Dec 2027 | another £200 |
| 6 months late | 29 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 29 Sep 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
- 10079877
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 23 March 2016 (10 years ago)
- Registered office
- 4TH Floor, 4 Tabernacle Street, London, EC2A 4LU
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 29 September (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 23 March 2026
- Previous names
- Curious Kitten Limited (until 4 Oct 2018)
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in London
Other active specialist construction companies registered in London.
- SR 19 Ltd2020
- SR Designers Ltd2015
- SR Empire Building Services Ltd2025
- Sra Swift Trading Ltd2017
- SRH Construction Ltd2024
- SRV Ltd2018
- SRW Construction Ltd2026
- SS&T Builders Ltd2021
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are Squarebrick Limited's accounts due?
Squarebrick Limited's next accounts are due at Companies House by 29 June 2027 (in 260 days), covering the period to 29 September 2026.
When is Squarebrick Limited's CT600 due?
The CT600 for the period to 29 September 2026 is due at HMRC by 29 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 30 June 2027.
Is Squarebrick Limited still trading?
Squarebrick 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 Squarebrick Limited do?
Squarebrick Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Squarebrick Limited?
Squarebrick Limited was incorporated on 23 March 2016, 10 years ago.
What is the penalty if Squarebrick 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 Squarebrick 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.