- Companies
- Installers
- Hertford
- Doi Group Limited
Doi Group Limited
- Company number
- 03367842
- Incorporated
- 9 May 199729 years trading
- Registered office
- 5 Yeomans Court, Ware Road, Hertford, Hertfordshire, SG13 7HJ
- Nature of business
- Other construction installation; Other building completion and finishing
Doi Group Limited is a 29-year-old private limited company registered in Hertford, company number 03367842, one of 24 installation companies (insulation, lifts, shutters and similar) in Hertford. Its next accounts are due at Companies House on 30 June 2027, and the CT600 for the period to 30 September 2026 is due at HMRC on 30 September 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 £410K (-86.1%) on the year before, to £66K.
- Net assets rose in 1 of 8 year-on-year comparisons on record.
- Current assets of £72K against £5,251 owed within a year: more than 10 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 30 Sep 2025 | £66K | £72K | £5,251 | 0 | |
| 30 Sep 2024 | £476K | £156K | £548K | £72K | 2 |
| 30 Jun 2023 | £786K | £427K | £874K | £91K | 3 |
| 30 Jun 2022 | £964K | £507K | £1.1M | £98K | 3 |
| 30 Jun 2021 | £1.2M | £638K | £1.3M | £139K | 4 |
| 30 Jun 2020 | £1.2M | £656K | £1.3M | £100K | 4 |
| 30 Jun 2019 | £1.3M | £654K | £1.4M | £139K | |
| 30 Jun 2018 | £1.3M | £708K | £1.4M | £198K | 4 |
| 31 Mar 2017 | £1.3M | £806K | £881K | £177K | 4 |
Where Doi Group Limited is registered
The registered office is in Hertford (SG13), in the East Hertfordshire local authority area, East of England. Show SG13 7HJ on a map.
Other trade companies in SG13
- D&M Solutions LtdCleaning companies
- Greenpassionlandscapes LtdLandscapers and gardeners
- Nexum Fire & Security LimitedElectricians
- Bullrig Electrical Services LtdElectricians
- Rule One Hold LimitedCleaning companies
- Simpson and West Construction LtdBuilders
- Better Utility Services LtdCivil engineering
- Herts Caravan Services LtdMachinery repair and installation
Also registered at this address
13 other companies use the same registered office as Doi Group Limited.
- Amwell Electrical LimitedElectricians
- Arpl CC LimitedProperty developers
- Block Scaffold Solutions LtdScaffolders
- Businessfitnessuk LimitedFinishing trades
- C & R Building Solutions LimitedRoofers
- Colin White Developments LimitedProperty developers
- Highbury Properties LimitedProperty developers
- Kingsway Commercial Interiors LimitedInstallers
- L E D Builders LimitedBuilders
- Lincoln’S Tyre Service (Ajs) LimitedMechanics and garages
- M.J.L. Construction Associates LimitedBuilders
- Pressbay LimitedMotor traders
- Stewarts Tail-Lift LimitedMechanics and garages
What happens if Doi 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 30 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jul 2027 to 31 Jul 2027 | £150 |
| 1 to 3 months late | 1 Aug 2027 to 30 Sep 2027 | £375 |
| 3 to 6 months late | 1 Oct 2027 to 31 Dec 2027 | £750 |
| More than 6 months late | From 1 Jan 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 03367842
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 May 1997 (29 years ago)
- Registered office
- 5 Yeomans Court, Ware Road, Hertford, Hertfordshire, SG13 7HJ
- Nature of business
- Other construction installation (SIC 43290)
Other building completion and finishing (SIC 43390) - Year end
- 30 September (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 30 September 2025
- Last confirmation statement
- 9 May 2026
- Charges (mortgages)
- 3 outstanding of 4 registered
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in Hertford
Other active installation companies (insulation, lifts, shutters and similar) registered in Hertford.
- DPK Maintenance Limited2022
- Draghici Build Ltd2025
- Everyone's Energy UK Limited2019
- Front Line Contractors UK Limited2024
- Gas Special Projects Ltd2021
- Ground Source Drainage Limited2023
- Harrison Hayes Ventilation Limited2015
- JLB Construction Limited2026
All installation companies (insulation, lifts, shutters and similar) in Hertford · All trades in Hertford · Installers across the UK
Frequently asked questions
When are Doi Group Limited's accounts due?
Doi Group Limited's next accounts are due at Companies House by 30 June 2027 (in 261 days), covering the period to 30 September 2026.
When is Doi Group Limited's CT600 due?
The CT600 for the period to 30 September 2026 is due at HMRC by 30 September 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 July 2027.
Is Doi Group Limited still trading?
Doi 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 Doi Group Limited do?
Doi Group Limited is registered under Other construction installation (SIC 43290); Other building completion and finishing (SIC 43390).
How old is Doi Group Limited?
Doi Group Limited was incorporated on 9 May 1997, 29 years ago.
What is the penalty if Doi 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 Doi 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.