- Companies
- Electricians
- Milton Keynes
- Calcon Projects Limited
Calcon Projects Limited
- Company number
- 10580663
- Incorporated
- 24 Jan 20179 years trading
- Registered office
- Challenge House Sherwood Drive, Bletchley, Milton Keynes, MK3 6DP
- Nature of business
- Electrical installation
Calcon Projects Limited is a 9-year-old private limited company registered in Milton Keynes, company number 10580663, one of 165 electrical contractors in Milton Keynes. Its next accounts are due at Companies House on 31 October 2026, and the CT600 for the period to 31 January 2026 is due at HMRC on 31 January 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 £15K (+9.7%) on the year before, to £174K.
- Net assets rose in 6 of 7 year-on-year comparisons on record.
- Current assets of £316K against £237K owed within a year: 1.3 times cover.
- 20 employees on average, up from 19 the year before.
- Balance sheets on record for 8 years, 2018 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jan 2025 | £174K | £5,984 | £316K | £237K | 20 |
| 31 Jan 2024 | £158K | £248K | £513K | £425K | 19 |
| 31 Jan 2023 | £51K | £1,181 | £190K | £117K | 16 |
| 31 Jan 2022 | £2,306 | £110K | £84K | 11 | |
| 31 Jan 2021 | -£3,094 | £23K | £134K | £97K | 8 |
| 31 Jan 2020 | £9,024 | £135K | £158K | 9 | |
| 31 Jan 2019 | £1,035 | ||||
| 31 Jan 2018 | £744 |
Where Calcon Projects Limited is registered
The registered office is in Milton Keynes (MK3), in the Milton Keynes local authority area, South East. Show MK3 6DP on a map.
Other trade companies in MK3
- Sas Tiling Services LtdFloor and wall tilers
- Hoichuk LtdLandscapers and gardeners
- Stokes Properties and Renovations LimitedFinishing trades
- All Pro Contractors LimitedRoofers
- MK Power Factor LtdElectricians
- LWM Electrical LtdElectricians
- Deep Clean Top Car Wash LtdCleaning companies
- Savitar Construction LtdProperty developers
Also registered at this address
3 other companies use the same registered office as Calcon Projects Limited.
- All Pro Contractors LimitedRoofers
- Redclean XT LtdCleaning companies
- Stokes Properties and Renovations LimitedFinishing trades
What happens if Calcon Projects 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 31 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 10580663
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 24 January 2017 (9 years ago)
- Registered office
- Challenge House Sherwood Drive, Bletchley, Milton Keynes, MK3 6DP
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 January 2025
- Last confirmation statement
- 25 June 2026
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in Milton Keynes
Other active electrical contractors registered in Milton Keynes.
- CCR Electrical Limited2024
- Citylite MK Ltd2023
- Codrai Electrical Services Limited2012
- Collettelectrical Limited2026
- Comfort Floors Limited2017
- Connolly Electrical Limited2010
- Cornpastie Ltd2025
- CT Sparks Ltd2016
All electrical contractors in Milton Keynes · All trades in Milton Keynes · Electricians across the UK
Frequently asked questions
When are Calcon Projects Limited's accounts due?
Calcon Projects Limited's next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is Calcon Projects Limited's CT600 due?
The CT600 for the period to 31 January 2026 is due at HMRC by 31 January 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2026.
Is Calcon Projects Limited still trading?
Calcon Projects 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 Calcon Projects Limited do?
Calcon Projects Limited is registered under Electrical installation (SIC 43210).
How old is Calcon Projects Limited?
Calcon Projects Limited was incorporated on 24 January 2017, 9 years ago.
What is the penalty if Calcon Projects 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 Calcon Projects 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.