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- SQ Construction Limited
Company profile · Civil engineering
SQ Construction Limited
SQ Construction Limited is a 20-year-old private limited company registered in Orpington, company number 05822729, one of 28 civil engineering contractors in Orpington. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 31 May 2025, as filed at Companies House.
SQ Construction 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 down £14K (-74.1%) on the year before, to £4,892.
- Net assets rose in 5 of 9 year-on-year comparisons on record.
- Current assets of £22K against £19K owed within a year: 1.1 times cover.
- 3 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 |
|---|---|---|---|---|---|
| 31 May 2025 | £4,892 | £22K | £19K | 3 | |
| 31 May 2024 | £19K | £52K | £19K | 3 | |
| 31 May 2023 | £6,191 | £38K | £23K | 3 | |
| 31 May 2022 | £62K | £2,523 | £36K | 3 | |
| 31 May 2021 | £37K | £20K | £22K | 3 | |
| 31 May 2020 | £17K | £19K | £36K | 3 | |
| 31 May 2019 | £25K | £14K | £40K | ||
| 31 May 2018 | £25K | £28K | £55K | ||
| 31 May 2017 | -£2,689 | £1,332 | £7,239 | ||
| 31 May 2016 | -£11K | £10K | £25K |
Who runs and owns SQ Construction Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (2)
| Name | Role | Appointed |
|---|---|---|
| M*** B*** | Director | May 2006 |
| M*** B*** | Secretary | May 2006 |
1 former officer
| Name | Role | Appointed | Left |
|---|---|---|---|
| A*** B*** | Director | May 2006 | Jun 2012 |
People with significant control (2)
Where SQ Construction Limited is registered
The registered office is in Orpington (BR6), in the Bromley local authority area, London. Show BR6 7RS on a map.
Other trade companies in BR6
- Tog Fire Protection LtdPlumbers and heating engineers
- Pointfast Global LtdMachinery repair and installation
- Chebic Energy and Property Services LtdFinishing trades
- Prime Refurbishment Kent LtdBuilders
- A.D Building Services London LtdFinishing trades
- Nemo Wash and Go LtdCleaning companies
- T.E.A.Mspotless LtdCleaning companies
- Howard Construction LtdProperty developers
What happens if SQ Construction 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 05822729
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 May 2006 (20 years ago)
- Registered office
- Penbryn, Chelsfield Lane, Orpington, BR6 7RS
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 8 July 2026
- Previous names
- Marusz Builders & Maintenance Services Limited (until 4 Aug 2009)
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Orpington
Other active civil engineering contractors registered in Orpington.
- Syscaf Limited2016
- T&M Pipelines Limited2004
- Tolbex Limited2026
- WPW Fire Alarm Installations Ltd2025
- 3Jais Ltd2019
- Aact Win Ltd2019
- Almic Group Ltd2012
- Am Civils Ltd2025
All civil engineering contractors in Orpington · All trades in Orpington · Civil engineering across the UK
Frequently asked questions
When are SQ Construction Limited's accounts due?
SQ Construction Limited's next accounts are due at Companies House by 28 February 2027 (in 139 days), covering the period to 31 May 2026.
When is SQ Construction Limited's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is SQ Construction Limited still trading?
SQ Construction 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 SQ Construction Limited do?
SQ Construction Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is SQ Construction Limited?
SQ Construction Limited was incorporated on 19 May 2006, 20 years ago.
Who runs SQ Construction Limited?
SQ Construction Limited has 1 active director, the longest-serving appointed in May 2006. Their names and service addresses are on the Companies House register.
Who owns SQ Construction Limited?
2 people or companies have significant control of SQ Construction Limited: an individual (owns 25% to 50% of the shares); an individual (owns 75% or more of the shares).
What is the penalty if SQ Construction 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 SQ Construction 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.