- Companies
- Specialist contractors
- Darlington
- Stone Technical Services Group Limited
Stone Technical Services Group Limited
- Company number
- 03912476
- Incorporated
- 24 Jan 200026 years trading
- Registered office
- Stone Technical Services Group Limited, Kellaw Road, Darlington, County Durham, DL1 4YA
- Nature of business
- Other specialised construction activities n.e.c.; Furnace and chimney cleaning services; Other building and industrial cleaning activities
Stone Technical Services Group Limited is a 26-year-old private limited company registered in Darlington, company number 03912476, one of 66 specialist construction companies in Darlington. 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 Stone Technical Services Group LimitedOr 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 £42K (+4.2%) on the year before, to £1M.
- Net assets rose in 8 of 9 year-on-year comparisons on record.
- Current assets of £1.2M against £575K owed within a year: 2.0 times cover.
- 42 employees on average, down from 45 the year before.
- Balance sheets on record for 10 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Nov 2025 | £1M | £247K | £1.2M | £575K | 42 |
| 30 Nov 2024 | £1000K | £559K | £1.1M | £532K | 45 |
| 30 Nov 2023 | £953K | £262K | £986K | £426K | 46 |
| 30 Nov 2022 | £823K | £183K | £950K | £559K | 47 |
| 30 Nov 2021 | £694K | £349K | £1.1M | £581K | 48 |
| 30 Nov 2020 | £610K | £395K | £954K | £521K | 41 |
| 30 Nov 2019 | £678K | £126K | £923K | £644K | 38 |
| 30 Nov 2018 | £426K | £3,808 | £552K | £475K | 39 |
| 30 Nov 2017 | £408K | £42K | £484K | £408K | 46 |
| 31 Jan 2017 | £371K | £55K | £583K | £537K |
Public contracts won
Stone Technical Services Group Limited has 16 public sector contract awards on record; the ones with their own published value total £1.3M, from 2016 to 2026. Source: Contracts Finder and Find a Tender award notices. For 1 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. 10 of these were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- Thirteen Housing Group Limited2 awards
- Gentoo Group1 award
- Natural England1 award
- Leeds City Council1 award
- Newcastle City Council1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| Gentoo Group | Lightning Protection Servicing, Remedial Works, and Responsive Repairs | 16 Mar 2026 | |
| Natural England | Castle Eden Dene Lightning Protection | £18K | 9 Mar 2025 |
| Thirteen Housing Group Limited | Inspection of Lightning Protection & External Fire Escapes | £75K | 4 Oct 2024 |
| Leeds City Council | Leeds Grand Theatre Maintenance Works - Early Works | £426K | 13 Aug 2024 |
| Newcastle City Council | Discovery Museum - emergency roof works | £71K | 9 Apr 2024 |
| Darlington Borough Council | PB2023-01019 - Specialist Masonry and Stonework repairs at the Crown Street Library | £17K | 13 May 2023 |
| Forestry Commission | Brown Law - Roof Covering Replacement | £33K | 23 Aug 2022 |
| Thirteen Housing Group Limited | Inspection of Lightning Protection & External Fire Escapes | £26K | 30 Mar 2022 |
| Lancashire Constabulary | The provision of Testing and Maintenance of Lightning Protection Systems. | £7,872 | 4 Dec 2020 |
| Durham County Council | Contract for Kirkoswald Castle Consolidation | £81K | 26 Nov 2020 |
Showing the 10 most recent of 16.
Where Stone Technical Services Group Limited is registered
The registered office is in Darlington (DL1), in the Darlington local authority area, North East. Show DL1 4YA on a map.
Other trade companies in DL1
- Darlo Car Wash LtdMechanics and garages
- Home by Aym LtdProperty developers
- Simply Gleaming LtdCleaning companies
- Sinead the Cleaning Lady LtdCleaning companies
- BB Optichrome LimitedCleaning companies
- JB Car & Commercials LtdMotor traders
- Egtc LtdLandscapers and gardeners
- LSS Contractors Ne LtdCivil engineering
What happens if Stone Technical Services Group 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 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
- 03912476
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 24 January 2000 (26 years ago)
- Registered office
- Stone Technical Services Group Limited, Kellaw Road, Darlington, County Durham, DL1 4YA
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
Furnace and chimney cleaning services (SIC 81223)
Other building and industrial cleaning activities (SIC 81229) - Year end
- 30 November (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 November 2025
- Last confirmation statement
- 12 February 2026
- Charges (mortgages)
- 2 outstanding of 3 registered
- Previous names
- Stone Technical Services Limited (until 16 Jan 2014)
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 Darlington
Other active specialist construction companies registered in Darlington.
- SW Lunnon Construction Ltd2018
- Three-6 Building Control Ltd2026
- Tica Certification Limited2025
- Tsu Limited2013
- Vanguard Property Care Ltd2026
- VSM Access Ltd2026
- West End Tree and Landscaping Limited2019
- Whessoe Road Aggregates Ltd2025
All specialist construction companies in Darlington · All trades in Darlington · Specialist contractors across the UK
Frequently asked questions
When are Stone Technical Services Group Limited's accounts due?
Stone Technical Services Group Limited's next accounts are due at Companies House by 31 August 2027 (in 322 days), covering the period to 30 November 2026.
When is Stone Technical Services Group Limited'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 Stone Technical Services Group Limited still trading?
Stone Technical Services Group 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 Stone Technical Services Group Limited do?
Stone Technical Services Group Limited is registered under Other specialised construction activities n.e.c. (SIC 43999); Furnace and chimney cleaning services (SIC 81223); Other building and industrial cleaning activities (SIC 81229).
How old is Stone Technical Services Group Limited?
Stone Technical Services Group Limited was incorporated on 24 January 2000, 26 years ago.
Has Stone Technical Services Group Limited won public sector contracts?
Yes. Stone Technical Services Group Limited has 16 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £1.3M), most recently from Gentoo Group.
What is the penalty if Stone Technical Services Group 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 Stone Technical Services Group 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.