- Company number
- 12265012
- Incorporated
- 16 Oct 20196 years trading
- Registered office
- Apex House, 2ND Floor Apex House, Grand Arcade, London, N12 0EH
- Nature of business
- Construction of domestic buildings
Concept Design Builders Ltd is a 6-year-old private limited company registered in London, company number 12265012, one of 12,075 building contractors in London. Companies House shows its accounts as overdue: they were due on 31 July 2026.
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 £9,432 (-64.1%) on the year before, to £5,287.
- Net assets rose in 1 of 4 year-on-year comparisons on record.
- Current assets of £172K against £175K owed within a year: 1.0 times cover.
- 3 employees on average during the year.
- Balance sheets on record for 5 years, 2020 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Oct 2024 | £5,287 | £35K | £172K | £175K | 3 |
| 31 Oct 2023 | £15K | £52K | £57K | £47K | 3 |
| 31 Oct 2022 | £1,162 | £30K | £45K | £51K | 3 |
| 31 Oct 2021 | £2,216 | £32K | £49K | £66K | 3 |
| 31 Oct 2020 | £15K | £24K | £8,650 | 8 |
Where Concept Design Builders Ltd is registered
The registered office is in London (N12), in the Barnet local authority area, London. Show N12 0EH on a map.
Other trade companies in N12
- Sullivan Property and Maintenance LtdFacilities management
- Mael Property Services LtdFinishing trades
- Horizon Constructors LtdProperty developers
- Alfawine Group LimitedFinishing trades
- Sam Motors Group LimitedMotor traders
- Heating on Demand LtdPlumbers and heating engineers
- Premium Electrical LtdElectricians
- Amaiya Sparks LtdCleaning companies
What happens if Concept Design Builders Ltd files late
If the accounts reach Companies House today, the late filing penalty is £375 (£750 if last year's accounts were also late). It rises at each step below.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2026 to 31 Aug 2026 | £150 |
| 1 to 3 months late | 1 Sep 2026 to 31 Oct 2026 | £375 |
| 3 to 6 months late | 1 Nov 2026 to 31 Jan 2027 | £750 |
| More than 6 months late | From 1 Feb 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2026 | £200 |
| 3 months late | 31 Jan 2027 | another £200 |
| 6 months late | 30 Apr 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 2027 | 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
- 12265012
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 16 October 2019 (6 years ago)
- Registered office
- Apex House, 2ND Floor Apex House, Grand Arcade, London, N12 0EH
- Nature of business
- Construction of domestic buildings (SIC 41202)
- Year end
- 31 October (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 October 2024
- Last confirmation statement
- 28 July 2025
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 London
Other active building contractors registered in London.
- Concept London Road Limited2021
- Conceptual Designs Ltd2013
- Concrete Construction Ltd2025
- Condal Ltd2020
- Condor Construction Limited2014
- Conlon Contracts Ltd2023
- Conn-Tech Ltd2025
- Connect Maintenance London Ltd2012
All building contractors in London · All trades in London · Builders across the UK
Frequently asked questions
When are Concept Design Builders Ltd's accounts due?
Concept Design Builders Ltd's accounts were due at Companies House on 31 July 2026 and the register shows them as overdue.
When is Concept Design Builders Ltd's CT600 due?
The CT600 for the period to 31 October 2025 is due at HMRC by 31 October 2026, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2026.
Is Concept Design Builders Ltd still trading?
Concept Design Builders Ltd is listed as active on the Companies House register (checked 13 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 Concept Design Builders Ltd do?
Concept Design Builders Ltd is registered under Construction of domestic buildings (SIC 41202).
How old is Concept Design Builders Ltd?
Concept Design Builders Ltd was incorporated on 16 October 2019, 6 years ago.
What is the penalty if Concept Design Builders 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 Concept Design Builders Ltd on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026, rechecked 13 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.