- Companies
- Installers
- London
- NBG Window Installation Limited
NBG Window Installation Limited
- Company number
- 11350412
- Incorporated
- 8 May 20188 years trading
- Registered office
- 99 Montagu Road, London, N18 2LX
- Nature of business
- Other construction installation
NBG Window Installation Limited is a 8-year-old private limited company registered in London, company number 11350412, one of 2,278 installation companies (insulation, lifts, shutters and similar) in London. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 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 £2,022 (-8.4%) on the year before, to £22K.
- Net assets rose in 4 of 6 year-on-year comparisons on record.
- Current assets of £44K against £20K owed within a year: 2.2 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 7 years, 2019 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2025 | £22K | £2,181 | £44K | £20K | 1 |
| 31 May 2024 | £24K | £4,446 | £52K | £23K | 1 |
| 31 May 2023 | £376 | £5,135 | £34K | £26K | 1 |
| 31 May 2022 | £375 | £13K | £43K | £32K | 1 |
| 31 May 2021 | £34K | £33K | £57K | £7,902 | 1 |
| 31 May 2020 | £16K | £4,918 | 0 | ||
| 31 May 2019 | £600 | £777 | £4,115 | £3,515 |
Where NBG Window Installation Limited is registered
The registered office is in London (N18), in the Enfield local authority area, London. Show N18 2LX on a map.
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What happens if NBG Window Installation 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 11350412
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 8 May 2018 (8 years ago)
- Registered office
- 99 Montagu Road, London, N18 2LX
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 5 May 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 London
Other active installation companies (insulation, lifts, shutters and similar) registered in London.
- Nby Limited2025
- NDK and Sons Ltd2023
- NDM Contractors Ltd2021
- Neat Builders Ltd2019
- Nelson Mvga Ltd2026
- Ness Fire Ltd2024
- Netherwood Place Limited2026
- Nevison Pipework Services Ltd2026
All installation companies (insulation, lifts, shutters and similar) in London · All trades in London · Installers across the UK
Frequently asked questions
When are NBG Window Installation Limited's accounts due?
NBG Window Installation Limited's next accounts are due at Companies House by 28 February 2027 (in 139 days), covering the period to 31 May 2026.
When is NBG Window Installation Limited's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is NBG Window Installation Limited still trading?
NBG Window Installation 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 NBG Window Installation Limited do?
NBG Window Installation Limited is registered under Other construction installation (SIC 43290).
How old is NBG Window Installation Limited?
NBG Window Installation Limited was incorporated on 8 May 2018, 8 years ago.
What is the penalty if NBG Window Installation 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 NBG Window Installation 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.