- Companies
- Property developers
- Watford
- SQ Building Design Ltd
SQ Building Design Ltd
- Company number
- 16718001
- Incorporated
- 15 Sep 20251 year trading
- Registered office
- 49 Eastlea Avenue, Watford, WD25 9DG
- Nature of business
- Development of building projects
SQ Building Design Ltd is a 1-year-old private limited company registered in Watford, company number 16718001, one of 277 property development companies in Watford. Its next accounts are due at Companies House on 15 June 2027, and its first CT600 is due at HMRC on 14 September 2027.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where SQ Building Design Ltd is registered
The registered office is in Watford (WD25), in the Watford local authority area, East of England. Show WD25 9DG on a map.
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What happens if SQ Building Design 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 15 June 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 16 Jun 2027 to 15 Jul 2027 | £150 |
| 1 to 3 months late | 16 Jul 2027 to 15 Sep 2027 | £375 |
| 3 to 6 months late | 16 Sep 2027 to 15 Dec 2027 | £750 |
| More than 6 months late | From 16 Dec 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2027 | £200 |
| 3 months late | 30 Dec 2027 | another £200 |
| 6 months late | 30 Mar 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 16718001
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 15 September 2025 (1 year ago)
- Registered office
- 49 Eastlea Avenue, Watford, WD25 9DG
- Nature of business
- Development of building projects (SIC 41100)
- Year end
- 30 September (accounting reference date)
- Accounts type
- No accounts filed yet
- Last confirmation statement
- 29 June 2026
Filing notes for property development companies
Many property development companies are single-project vehicles. Stock of land and buildings sits on the balance sheet as work in progress until sale, and a company that has finished its project may become dormant rather than close.
Similar companies in Watford
Other active property development companies registered in Watford.
- Sterling Hearth Limited2026
- Sullivan Brothers Construction Ltd2016
- Sunsan Estates Limited2019
- Svart Home Ltd2020
- SW Site Management Services Ltd2025
- Swancrest Properties Limited2024
- Synergy Eco Ltd2021
- T.I.M.E. Construct Limited2021
All property development companies in Watford · All trades in Watford · Property developers across the UK
Frequently asked questions
When are SQ Building Design Ltd's accounts due?
SQ Building Design Ltd's next accounts are due at Companies House by 15 June 2027 (in 245 days), covering the period to 30 September 2026.
When is SQ Building Design Ltd's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 14 September 2026, due by 14 September 2027, and one for the period to 30 September 2026, due by 30 September 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is SQ Building Design Ltd still trading?
SQ Building Design 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 SQ Building Design Ltd do?
SQ Building Design Ltd is registered under Development of building projects (SIC 41100).
How old is SQ Building Design Ltd?
SQ Building Design Ltd was incorporated on 15 September 2025, 1 year ago.
What is the penalty if SQ Building Design 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 SQ Building Design 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.