- Companies
- Electricians
- London
- Watt & Wilder Ltd
Watt & Wilder Ltd
- Company number
- 17019873
- Incorporated
- 9 Feb 2026
- Registered office
- 20 Wenlock Road, London, N1 7GU
- Nature of business
- Electrical installation; Retail sale via mail order houses or via Internet
Watt & Wilder Ltd is a newly incorporated private limited company registered in London, company number 17019873, one of 3,448 electrical contractors in London. Its next accounts are due at Companies House on 9 November 2027, and its first CT600 is due at HMRC on 8 February 2028.
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 Watt & Wilder Ltd is registered
The registered office is in London (N1), in the Hackney local authority area, London. Show N1 7GU on a map.
Other trade companies in N1
- Tagwise LtdSpecialist contractors
- Sphere Aviation Solutions UK LtdMachinery repair and installation
- Get IT Done Builders LtdJoiners and carpenters
- Evolution Products LimitedMotor traders
- Fleetstone Trading LtdMotor traders
- Kenneth Brady LtdElectricians
- UK Import Export LtdBuilders
- Magic Door Services LimitedMachinery repair and installation
Shared registered office
1,583 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if Watt & Wilder 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 9 November 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 10 Nov 2027 to 9 Dec 2027 | £150 |
| 1 to 3 months late | 10 Dec 2027 to 9 Feb 2028 | £375 |
| 3 to 6 months late | 10 Feb 2028 to 9 May 2028 | £750 |
| More than 6 months late | From 10 May 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 29 Feb 2028 | £200 |
| 3 months late | 28 May 2028 | another £200 |
| 6 months late | 28 Aug 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 28 Feb 2029 | 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
- 17019873
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 9 February 2026
- Registered office
- 20 Wenlock Road, London, N1 7GU
- Nature of business
- Electrical installation (SIC 43210)
Retail sale via mail order houses or via Internet (SIC 47910) - Year end
- 28 February (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in London
Other active electrical contractors registered in London.
- Watt Chargers Ltd2024
- Watt Rite Ltd2026
- Wattif Ev UK Ltd2021
- Wattly Energy UK Ltd2025
- Watts Amp Electrical Services Ltd2018
- Waymark Electrical Ltd2026
- Wayze Engineering Limited2021
- We Fix London 24/7 Ltd2026
All electrical contractors in London · All trades in London · Electricians across the UK
Frequently asked questions
When are Watt & Wilder Ltd's accounts due?
Watt & Wilder Ltd's next accounts are due at Companies House by 9 November 2027 (in 392 days), covering the period to 28 February 2027.
When is Watt & Wilder 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 8 February 2027, due by 8 February 2028, and one for the period to 28 February 2027, due by 28 February 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Watt & Wilder Ltd still trading?
Watt & Wilder 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 Watt & Wilder Ltd do?
Watt & Wilder Ltd is registered under Electrical installation (SIC 43210); Retail sale via mail order houses or via Internet (SIC 47910).
How old is Watt & Wilder Ltd?
Watt & Wilder Ltd was incorporated on 9 February 2026, less than a year ago.
What is the penalty if Watt & Wilder 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 Watt & Wilder 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.