- Company number
- 13106856
- Incorporated
- 31 Dec 20205 years trading
- Registered office
- 28 the Gardens, Harrow, HA1 4EY
- Nature of business
- Construction of domestic buildings
RBG Building Ltd is a 5-year-old private limited company registered in Harrow, company number 13106856, one of 793 building contractors in Harrow. 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 up £366 (+1.7%) on the year before, to £22K.
- Net assets rose in 2 of 4 year-on-year comparisons on record.
- Current assets of £57K against £64K owed within a year: 0.9 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 5 years, 2021 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £22K | £45K | £57K | £64K | 2 |
| 31 Dec 2024 | £22K | £48K | £55K | 2 | |
| 31 Dec 2023 | £25K | £46K | £33K | 1 | |
| 31 Dec 2022 | £28K | £70K | £50K | 1 | |
| 31 Dec 2021 | £15K | £11K | £683 | 1 |
Where RBG Building Ltd is registered
The registered office is in Harrow (HA1), in the Harrow local authority area, London. Show HA1 4EY on a map.
Other trade companies in HA1
- Cabos Electrical LimitedElectricians
- Mia Maria Services LtdCleaning companies
- Ac Operations LtdScaffolders
- Verde Masters LtdLandscapers and gardeners
- Omega Works Group LtdLandscapers and gardeners
- Call 'Em LimitedPlumbers and heating engineers
- Swan Roofing Services LimitedRoofers
- DRV Property Solutions LtdPainters and decorators
What happens if RBG Building 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
- 13106856
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 31 December 2020 (5 years ago)
- Registered office
- 28 the Gardens, Harrow, HA1 4EY
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 9 December 2025
- Previous names
- RBG Interior Design Ltd (until 16 Jul 2021)
RBG Building Ltd (until 15 Jul 2021)
Filing notes for building contractors
Building companies often run the Construction Industry Scheme as a contractor, a subcontractor or both. CIS deductions suffered during the year are set against the PAYE bill, and any unrecovered balance at the year end matters when the accounts are drawn up.
Similar companies in Harrow
Other active building contractors registered in Harrow.
- RD Mechanical Systems Ltd2024
- RDC Solution Ltd2025
- Reading Construction Group Ltd2026
- Refab Ltd2026
- Regency Home Maintenance Ltd2024
- Rel Construction Limited2009
- Renvic Ltd2025
- Ripple Survey Solutions Limited2025
All building contractors in Harrow · All trades in Harrow · Builders across the UK
Frequently asked questions
When are RBG Building Ltd's accounts due?
RBG Building Ltd's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is RBG Building 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 RBG Building Ltd still trading?
RBG Building 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 RBG Building Ltd do?
RBG Building Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is RBG Building Ltd?
RBG Building Ltd was incorporated on 31 December 2020, 5 years ago.
What is the penalty if RBG Building 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 RBG Building 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.