- Companies
- Installers
- Lincoln
- Duplex Installations Ltd
Duplex Installations Ltd
- Company number
- 11865429
- Incorporated
- 6 Mar 20197 years trading
- Registered office
- 30 Sleaford Road, Bracebridge Heath, Lincoln, LN4 2ND
- Nature of business
- Other construction installation
Duplex Installations Ltd is a 7-year-old private limited company registered in Lincoln, company number 11865429, one of 62 installation companies (insulation, lifts, shutters and similar) in Lincoln. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 up £4,641 (+105.3%) on the year before, to £9,048.
- Net assets rose in 2 of 5 year-on-year comparisons on record.
- Current assets of £30K against £36K owed within a year: 0.8 times cover.
- 2 employees on average, down from 4 the year before.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | £9,048 | £23K | £30K | £36K | 2 |
| 31 Mar 2024 | £4,407 | £6,904 | £31K | £58K | 4 |
| 31 Mar 2023 | £18K | £13K | £35K | £32K | 4 |
| 31 Mar 2022 | £28K | £32K | £45K | £23K | 4 |
| 31 Mar 2021 | £24K | £34K | £39K | £15K | 3 |
| 31 Mar 2020 | £30K | £36K | £59K | £29K | 3 |
Where Duplex Installations Ltd is registered
The registered office is in Lincoln (LN4), in the North Kesteven local authority area, East Midlands. Show LN4 2ND on a map.
Other trade companies in LN4
- Coulton Gas Services LimitedPlumbers and heating engineers
- Davenco LtdMotor traders
- B12 Voltage LtdMechanics and garages
- CC Plastering & Rendering Services LtdBuilders
- Darmick Scaffolding LtdScaffolders
- Norris Energy Solutions LimitedElectricians
- JT Plumbing LtdPlumbers and heating engineers
- Easy Camp Levelling LtdMotor traders
Also registered at this address
16 other companies use the same registered office as Duplex Installations Ltd.
- All Round Automotive LimitedMechanics and garages
- Eds Solutions Lincs LtdPlumbers and heating engineers
- Fixit & Finish Lincs LtdFinishing trades
- Imp Home Surveying LtdBuilders
- It's in the Detail LtdCleaning companies
- J A Gaughan LimitedSpecialist contractors
- Jaykay Scaffolding LimitedScaffolders
- Keevo Developments LtdProperty developers
- Lincs Plumb LtdPlumbers and heating engineers
- Mark Stringer Double Glazing LimitedFinishing trades
- Marriott Building and Groundwork LtdSpecialist contractors
- MC Plumbing & Heating (Lincoln) LimitedPlumbers and heating engineers
- MK Electrical (Lincoln) LimitedElectricians
- Ruddplumb LtdPlumbers and heating engineers
- Skidmore Building Contractors LtdBuilders
- Virtual HR Manager LtdSpecialist contractors
What happens if Duplex Installations 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 31 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 11865429
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 6 March 2019 (7 years ago)
- Registered office
- 30 Sleaford Road, Bracebridge Heath, Lincoln, LN4 2ND
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 5 March 2026
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 Lincoln
Other active installation companies (insulation, lifts, shutters and similar) registered in Lincoln.
- East Coast Infrastructure Services Ltd2024
- Ecis Renewables Ltd2026
- G.Foulston Home Improvements Ltd2012
- Greenlinc Plumbing & Renewables Limited2020
- HD Brickwork (Lincoln) Ltd2022
- Heated Driveway Systems Ltd2017
- Hubren Building Services Ltd2008
- Hylo Ltd2017
All installation companies (insulation, lifts, shutters and similar) in Lincoln · All trades in Lincoln · Installers across the UK
Frequently asked questions
When are Duplex Installations Ltd's accounts due?
Duplex Installations Ltd's next accounts are due at Companies House by 31 December 2026 (in 79 days), covering the period to 31 March 2026.
When is Duplex Installations Ltd's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Duplex Installations Ltd still trading?
Duplex Installations 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 Duplex Installations Ltd do?
Duplex Installations Ltd is registered under Other construction installation (SIC 43290).
How old is Duplex Installations Ltd?
Duplex Installations Ltd was incorporated on 6 March 2019, 7 years ago.
What is the penalty if Duplex Installations 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 Duplex Installations 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.