- Companies
- Specialist contractors
- London
- Design & Building Firm Ltd
Design & Building Firm Ltd
- Company number
- 09603716
- Incorporated
- 21 May 201511 years trading
- Registered office
- Second Floor, 150-151 Fleet Street, London, EC4A 2DQ
- Nature of business
- Other specialised construction activities n.e.c.
Design & Building Firm Ltd is a 11-year-old private limited company registered in London, company number 09603716, one of 4,318 specialist construction companies 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 £2,856 (-3.1%) on the year before, to -£95K.
- Net assets rose in 3 of 9 year-on-year comparisons on record.
- Current assets of £553 against £105K owed within a year: 0.0 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2025 | -£95K | £553 | £105K | 1 | |
| 31 May 2024 | -£93K | £2,125 | £104K | 1 | |
| 31 May 2023 | -£77K | -£1,179 | £84K | 1 | |
| 31 May 2022 | -£30K | £19K | £57K | 1 | |
| 31 May 2021 | £27K | £80K | £62K | 1 | |
| 31 May 2020 | £1,908 | £27K | £25K | 1 | |
| 31 May 2019 | £2,245 | £17K | £15K | ||
| 31 May 2018 | £28K | £57K | £36K | ||
| 31 May 2017 | £1,932 | £43K | £41K | ||
| 31 May 2016 | £1,419 | £29K | £35K | £34K |
Where Design & Building Firm Ltd is registered
The registered office is in London (EC4A), in the City of London local authority area, London. Show EC4A 2DQ on a map.
Other trade companies in EC4A
- Mountwood Design LimitedProperty developers
- 38 SS Renovations LtdProperty developers
- JBD Care LimitedProperty developers
- Tramps Construction Company LtdProperty developers
- Didge Electrical & Building Services LtdElectricians
- Square One Decorating & Plastering LimitedPlasterers
- Project1 UK Contracting LtdBuilders
- Belmont HGL LimitedProperty developers
Also registered at this address
2 other companies use the same registered office as Design & Building Firm Ltd.
- BDH Sustainability LtdSpecialist contractors
- Motor Parts Hub LimitedMotor traders
What happens if Design & Building Firm 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 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
- 09603716
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 21 May 2015 (11 years ago)
- Registered office
- Second Floor, 150-151 Fleet Street, London, EC4A 2DQ
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 2 July 2026
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in London
Other active specialist construction companies registered in London.
- Design 121 Limited2017
- Design Builders Ltd2021
- Designspacelondon Limited2005
- Destination Zero Limited2026
- Destiny Construction Company Limited2021
- Destroyer Ytp Ltd2025
- Detrox Ltd2026
- Develop in London Ltd2016
All specialist construction companies in London · All trades in London · Specialist contractors across the UK
Frequently asked questions
When are Design & Building Firm Ltd's accounts due?
Design & Building Firm Ltd's next accounts are due at Companies House by 28 February 2027 (in 138 days), covering the period to 31 May 2026.
When is Design & Building Firm Ltd'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 Design & Building Firm Ltd still trading?
Design & Building Firm 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 Design & Building Firm Ltd do?
Design & Building Firm Ltd is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Design & Building Firm Ltd?
Design & Building Firm Ltd was incorporated on 21 May 2015, 11 years ago.
What is the penalty if Design & Building Firm 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 Design & Building Firm 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.