- Companies
- Civil engineering
- Slough
- KJB Civil Engineering Ltd
KJB Civil Engineering Ltd
- Company number
- 06503977
- Incorporated
- 14 Feb 200818 years trading
- Registered office
- Dawn Cottage Kingsway Mews, Farnham Common, Slough, SL2 3UR
- Nature of business
- Construction of other civil engineering projects n.e.c.
KJB Civil Engineering Ltd is a 18-year-old private limited company registered in Slough, company number 06503977, one of 39 civil engineering contractors in Slough. Its next accounts are due at Companies House on 2 January 2027, and the CT600 for the period to 2 April 2026 is due at HMRC on 2 April 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 KJB Civil Engineering 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 £59K (+32.4%) on the year before, to £242K.
- Net assets rose in 7 of 9 year-on-year comparisons on record.
- Current assets of £249K against £52K owed within a year: 4.8 times cover.
- 1 employee 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 |
|---|---|---|---|---|---|
| 5 Apr 2025 | £242K | £249K | £52K | 1 | |
| 5 Apr 2024 | £183K | £249K | £63K | 1 | |
| 5 Apr 2023 | £137K | £145K | £1,149 | 1 | |
| 5 Apr 2022 | £112K | £126K | £18K | 1 | |
| 5 Apr 2021 | £100K | £101K | £5,874 | 1 | |
| 5 Apr 2020 | £140K | £163K | £30K | 1 | |
| 5 Apr 2019 | £68K | £68K | £8,789 | ||
| 5 Apr 2018 | £60K | £52K | £2,698 | ||
| 5 Apr 2017 | £68K | £63K | £9,107 | ||
| 5 Apr 2016 | £45K | £66K | £81K |
Where KJB Civil Engineering Ltd is registered
The registered office is in Slough (SL2), in the Buckinghamshire local authority area, South East. Show SL2 3UR on a map.
Other trade companies in SL2
- Selmani&Aj Developments LimitedBuilders
- SMKD LimitedMotor traders
- Sloughcleanings LtdCleaning companies
- Neal LtdBuilders
- J Nomah LtdBuilders
- Eton Motor Group LtdMotor traders
- All Perfect Services LtdBuilders
- Datchet Car Body Shop LtdMechanics and garages
What happens if KJB Civil Engineering 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 2 January 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 3 Jan 2027 to 2 Feb 2027 | £150 |
| 1 to 3 months late | 3 Feb 2027 to 2 Apr 2027 | £375 |
| 3 to 6 months late | 3 Apr 2027 to 2 Jul 2027 | £750 |
| More than 6 months late | From 3 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 3 Apr 2027 | £200 |
| 3 months late | 2 Jul 2027 | another £200 |
| 6 months late | 2 Oct 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 2 Apr 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
- 06503977
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 14 February 2008 (18 years ago)
- Registered office
- Dawn Cottage Kingsway Mews, Farnham Common, Slough, SL2 3UR
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 2 April (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 5 April 2025
- Last confirmation statement
- 21 April 2026
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 Slough
Other active civil engineering contractors registered in Slough.
- KS Gharu Construction Ltd2019
- M.R.H. (Designs) Limited1999
- Mannabdellium Ltd2020
- Megan Services Ltd2008
- Meterit Utilities Ltd2018
- MP&M Builders Ltd2020
- Neshanth Construction Limited2020
- Nextlink Solutions Limited2026
All civil engineering contractors in Slough · All trades in Slough · Civil engineering across the UK
Frequently asked questions
When are KJB Civil Engineering Ltd's accounts due?
KJB Civil Engineering Ltd's next accounts are due at Companies House by 2 January 2027 (in 81 days), covering the period to 2 April 2026.
When is KJB Civil Engineering Ltd's CT600 due?
The CT600 for the period to 2 April 2026 is due at HMRC by 2 April 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 3 January 2027.
Is KJB Civil Engineering Ltd still trading?
KJB Civil Engineering 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 KJB Civil Engineering Ltd do?
KJB Civil Engineering Ltd is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is KJB Civil Engineering Ltd?
KJB Civil Engineering Ltd was incorporated on 14 February 2008, 18 years ago.
What is the penalty if KJB Civil Engineering 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 KJB Civil Engineering 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.