- Company number
- SC749585
- Incorporated
- 7 Nov 20223 years trading
- Registered office
- 14 Hillside, Kilsyth, Glasgow, G65 9HL
- Nature of business
- Construction of domestic buildings
Colzium Construction Ltd is a 3-year-old private limited company registered in Glasgow, company number SC749585, one of 593 building contractors in Glasgow. Its next accounts are due at Companies House on 31 August 2027, and the CT600 for the period to 30 November 2026 is due at HMRC on 30 November 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 Colzium Construction 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.
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 £736 (+9.3%) on the year before, to £8,657.
- Current assets of £13K against £4,306 owed within a year: 3.0 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 3 years, 2023 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2025 | £8,657 | £11 | £13K | £4,306 | 2 |
| 30 Nov 2024 | £7,921 | £1,397 | £11K | £2,960 | 2 |
| 30 Nov 2023 | £1 | £1 | £1 | 0 |
Where Colzium Construction Ltd is registered
The registered office is in Glasgow (G65), in the North Lanarkshire local authority area, Scotland. Show G65 9HL on a map.
Other trade companies in G65
- J.Crawford Cleans LtdCleaning companies
- Four Seasons Landscaping Stirling LtdLandscapers and gardeners
- McCabe Home & Property Services LtdCleaning companies
- Barn Property Developers LtdProperty developers
- R&M Property Partners LtdProperty developers
- Wire in Electrical Solutions LimitedElectricians
- Matter Plumbing LtdPlumbers and heating engineers
- Mastercoat LtdPainters and decorators
What happens if Colzium Construction 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 August 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Sep 2027 to 30 Sep 2027 | £150 |
| 1 to 3 months late | 1 Oct 2027 to 30 Nov 2027 | £375 |
| 3 to 6 months late | 1 Dec 2027 to 29 Feb 2028 | £750 |
| More than 6 months late | From 1 Mar 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Dec 2027 | £200 |
| 3 months late | 29 Feb 2028 | another £200 |
| 6 months late | 30 May 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Nov 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
- SC749585
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 7 November 2022 (3 years ago)
- Registered office
- 14 Hillside, Kilsyth, Glasgow, G65 9HL
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 30 November (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 6 November 2025
- Previous names
- Kingsway Maintenance Services Ltd (until 22 Feb 2024)
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Glasgow
Other active building contractors registered in Glasgow.
- Concept Building Construction Ltd2019
- Concept Construction Developments Ltd2026
- Construction Building for You Limited2021
- Construction Direct (UK) Limited2007
- Contract Distribution Services Ltd2024
- Core Construction Innovation Ltd2021
- Corporation Street Hotel (Rochester) Ltd.2008
- Coulter Plant Hire Ltd2023
All building contractors in Glasgow · All trades in Glasgow · Builders across the UK
Frequently asked questions
When are Colzium Construction Ltd's accounts due?
Colzium Construction Ltd's next accounts are due at Companies House by 31 August 2027 (in 323 days), covering the period to 30 November 2026.
When is Colzium Construction Ltd's CT600 due?
The CT600 for the period to 30 November 2026 is due at HMRC by 30 November 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 September 2027.
Is Colzium Construction Ltd still trading?
Colzium Construction 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 Colzium Construction Ltd do?
Colzium Construction Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is Colzium Construction Ltd?
Colzium Construction Ltd was incorporated on 7 November 2022, 3 years ago.
What is the penalty if Colzium Construction 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 Colzium Construction 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.