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- Machinery repair and installation
- Dunstable
- Complete Combustion Limited
Company profile · Machinery repair and installation
Complete Combustion Limited
Complete Combustion Limited is a 25-year-old private limited company registered in Dunstable, company number 04133230, one of 43 machinery repair and installation companies in Dunstable. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 2028.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2026
From the balance sheet at 31 March 2026, as filed at Companies House.
Complete Combustion 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 £26K (+3.3%) on the year before, to £805K.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £771K against £52K owed within a year: more than 10 times cover.
- 1 employee 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 Mar 2026 | £805K | £99K | £771K | £52K | 1 |
| 31 Mar 2025 | £779K | £113K | £746K | £54K | 1 |
| 31 Mar 2024 | £692K | £242K | £680K | £77K | 1 |
| 31 Mar 2023 | £582K | £200K | £638K | £77K | 1 |
| 31 Mar 2022 | £541K | £190K | £602K | £81K | 1 |
| 31 Mar 2021 | £424K | £210K | £488K | £81K | 1 |
| 31 Mar 2020 | £360K | £134K | £393K | £49K | 1 |
| 31 Mar 2019 | £298K | £298K | £325K | £46K | |
| 31 Mar 2018 | £244K | £251K | £288K | £66K | 1 |
| 31 Mar 2017 | £247K | £271K | £292K | £65K | 1 |
Where Complete Combustion Limited is registered
The registered office is in Dunstable (LU6), in the Buckinghamshire local authority area, South East. Show LU6 2FL on a map.
Other trade companies in LU6
- Ovi's Pressure Wash LtdSpecialist contractors
- Emre Property Holdings LtdProperty developers
- Fremii Flooring Products LimitedFloor and wall tilers
- Hussain, Bros Builders LtdBuilders
- Chiltren Constructions LimitedProperty developers
- Sme Services LimitedElectricians
- Motohaven LtdMotor traders
- Total Property Care Herts,Beds,Bucks LtdCleaning companies
Also registered at this address
1 other company uses the same registered office as Complete Combustion Limited.
- Fusion Splice LimitedElectricians
What happens if Complete Combustion 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 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 04133230
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 December 2000 (25 years ago)
- Registered office
- 65 Moor End, Edlesborough, Dunstable, LU6 2FL
- Nature of business
- Repair of other equipment (SIC 33190)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 20 December 2025
Filing notes for machinery repair and installation companies
Machinery repair and installation companies often carry parts stock and specialist tools, and many work on contracts that span the year end.
Similar companies in Dunstable
Other active machinery repair and installation companies registered in Dunstable.
- Complete Control Services London Limited2012
- Decam Electronics Limited2009
- Djcsewing Ltd2016
- Dual Fix Ltd2021
- Eco Energy Solar & Storage Ltd2026
- Ellis Autos Limited2005
- Engineering Techsolution Ltd2025
- Eyes Green Limited2024
All machinery repair and installation companies in Dunstable · All trades in Dunstable · Machinery repair and installation across the UK
Frequently asked questions
When are Complete Combustion Limited's accounts due?
Complete Combustion Limited's next accounts are due at Companies House by 31 December 2027 (in 445 days), covering the period to 31 March 2027.
When is Complete Combustion Limited's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is Complete Combustion Limited still trading?
Complete Combustion 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 Complete Combustion Limited do?
Complete Combustion Limited is registered under Repair of other equipment (SIC 33190).
How old is Complete Combustion Limited?
Complete Combustion Limited was incorporated on 29 December 2000, 25 years ago.
What is the penalty if Complete Combustion 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 Complete Combustion 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.