- Companies
- Specialist contractors
- Leigh-on-Sea
- CSF Building Contractors Ltd
CSF Building Contractors Ltd
- Company number
- 07474830
- Incorporated
- 21 Dec 201015 years trading
- Registered office
- 1210 London Road, Leigh-on-Sea, Essex, SS9 2UA
- Nature of business
- Other specialised construction activities n.e.c.
CSF Building Contractors Ltd is a 15-year-old private limited company registered in Leigh-on-Sea, company number 07474830, one of 105 specialist construction companies in Leigh-on-Sea. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 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 down £15K (-6.7%) on the year before, to £204K.
- Net assets rose in 2 of 9 year-on-year comparisons on record.
- Current assets of £333K against £138K owed within a year: 2.4 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 Dec 2025 | £204K | £144K | £333K | £138K | 3 |
| 31 Dec 2024 | £218K | £259K | £384K | £174K | 3 |
| 31 Dec 2023 | £236K | £220K | £328K | £105K | 3 |
| 31 Dec 2022 | £225K | £229K | £363K | £155K | 3 |
| 31 Dec 2021 | £200K | £116K | £309K | £119K | 3 |
| 31 Dec 2020 | £258K | £243K | £384K | £104K | 3 |
| 31 Dec 2019 | £329K | £295K | £389K | £110K | 3 |
| 31 Dec 2018 | £363K | £413K | £656K | £329K | 3 |
| 31 Dec 2017 | £425K | £398K | £444K | £34K | 3 |
| 31 Dec 2016 | £623K | £499K | £717K | £117K | 3 |
Public contracts won
CSF Building Contractors Ltd has 13 public sector contract awards on record; the ones with their own published value total £647K, from 2015 to 2026. Source: Contracts Finder and Find a Tender award notices. For 5 of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown. 8 of these were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- South London and Maudsley NHS Foundation Trust3 awards
- NHS Property Services Limited3 awards
- Hornchurch Academy Trust1 award
- Quality Trusted Solutions1 award
- Hornchurch Academy Trust1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Hornchurch Academy Trust | PP-10183b Hornchurch Academy Trust Construction, Infrastructure, Building Works, Installations and Renewables Open Framework | Ceiling, not shown | 21 May 2026 |
| South London and Maudsley NHS Foundation Trust | 59 Cordwell Road Window and External Door Set Replacement Works | £100K | 1 Jan 2026 |
| Quality Trusted Solutions | QTS Estates Maintenance Services Framework | Ceiling, not shown | 24 Dec 2025 |
| NHS Property Services Limited | Installation of Therapy Garden at Thundersley Clinic | £29K | 4 Mar 2025 |
| Hornchurch Academy Trust | PP-10113 Hornchurch Academy Trust Small Building Works | Ceiling, not shown | 10 Feb 2025 |
| South London and Maudsley NHS Foundation Trust | SLaM Bethlem Royal Hospital CCTV Control Room Centralisation Building Works | £163K | 4 Mar 2024 |
| NHS Property Services Limited | The Lister Primary Care Health Centre Refurb | £47K | 4 Mar 2024 |
| Surrey and Borders Partnership NHS Trust, on behalf of NHS Commercial Solutions | Extension - Anti-ligature, Specialist and General Doors, Windows, Furniture, Accessories and Associated Services Framework Agreement | Ceiling, not shown | 20 Sep 2023 |
| NHS Commercial Solutions | A Framework Agreement for Anti-ligature, Specialist and General Doors, Windows, Furniture, Accessories and Associated Services | Ceiling, not shown | 20 Sep 2023 |
| NHS Property Services Limited | Enabling Works and Demolition Project Works at John Scott Health Centre | £29K | 14 Nov 2022 |
Showing the 10 most recent of 13.
Where CSF Building Contractors Ltd is registered
The registered office is in Leigh-on-Sea (SS9), in the Southend-on-Sea local authority area, East of England. Show SS9 2UA on a map.
Other trade companies in SS9
- Cheap Locksmith Essex LtdRepair services
- Alexander Hall Real Estate LtdProperty developers
- Britannia Roofing & Dampproofing LtdRoofers
- Elite Build & Co (Essex) LtdBuilders
- High Lift Scaffold LimitedScaffolders
- Hill's Plumbing, Heating & Gas LtdPlumbers and heating engineers
- MTS Piling LimitedSpecialist contractors
- Install & Transport LimitedMachinery repair and installation
Also registered at this address
6 other companies use the same registered office as CSF Building Contractors Ltd.
- Advanced Metal Finishers LimitedPainters and decorators
- Mah Builders (Essex) LtdFinishing trades
- MJC Property Maintenance LimitedProperty developers
- N V C Durris LtdBuilders
- P & J Tyre Services LimitedMechanics and garages
- Westleigh Plumbing LtdPlumbers and heating engineers
What happens if CSF Building Contractors 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 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 07474830
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 21 December 2010 (15 years ago)
- Registered office
- 1210 London Road, Leigh-on-Sea, Essex, SS9 2UA
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 14 December 2025
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Leigh-on-Sea
Other active specialist construction companies registered in Leigh-on-Sea.
- CSS Construction Services Limited2014
- D Ward Plastering Ltd2022
- Dni Interiors Limited2019
- DW Plantscape Limited2020
- Ege Group Ltd2024
- Ekk Construction Services Ltd2023
- Elite Insulations Limited2013
- Esg Environmental Ltd2023
All specialist construction companies in Leigh-on-Sea · All trades in Leigh-on-Sea · Specialist contractors across the UK
Frequently asked questions
When are CSF Building Contractors Ltd's accounts due?
CSF Building Contractors Ltd's next accounts are due at Companies House by 30 September 2027 (in 353 days), covering the period to 31 December 2026.
When is CSF Building Contractors Ltd's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is CSF Building Contractors Ltd still trading?
CSF Building Contractors 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 CSF Building Contractors Ltd do?
CSF Building Contractors Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is CSF Building Contractors Ltd?
CSF Building Contractors Ltd was incorporated on 21 December 2010, 15 years ago.
Has CSF Building Contractors Ltd won public sector contracts?
Yes. CSF Building Contractors Ltd has 13 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £647K), most recently from HORNCHURCH ACADEMY TRUST.
What is the penalty if CSF Building Contractors 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 CSF Building Contractors 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.