# BOILER UPGRADE LTD (15377020)

> BOILER UPGRADE LTD is an active private limited company (company number 15377020) incorporated on 30 December 2023, registered in Dereham. Its registered activity is plumbing, heat and air-conditioning installation (SIC 43220). Latest small accounts cover the period ending 31 December 2025, showing net assets of −£215 and cash of £19k, with 1 employee on average. Net assets fell 101% on the prior period (£20k).

- Status: Active
- Incorporated: 2023-12-30
- Registered office: Dereham, NR20 4NU
- SIC 43220: Plumbing, heat and air-conditioning installation
- Next accounts due: 2027-09-30
- Confirmation statement due: 2027-01-13
- Accounts type: TOTAL EXEMPTION FULL

By net assets it sits in the lower half of 6,191 comparable companies in Other (median £5,839, upper quartile £35k).

## Accounts (as filed)

| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 2025-12-31 | −£215 | £19k | £980 | — | — | — | 1 |
| 2024-12-31 | £20k | £47k | £2,053 | — | — | — | 1 |
| 2023-12-29 | — | — | — | — | — | — | — |

size band micro.

## Filing and accounts signals (facts, not a rating)

- Net assets below zero: Net assets £-215 at 31 December 2025
- Net assets down 25% or more on the prior period: -101.1% vs prior period
- Three or more accounting periods on record: 3 periods on record
- Incorporated two to five years ago: Incorporated 30 December 2023

How each signal is derived: https://firmoscan.com/methodology

## Persons with significant control

- Mr Declan James Whittle — owns 75–100% of shares; holds 75–100% of voting rights; can appoint or remove directors, since 2023-12-30

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Source: Companies House register snapshot 2026-08-31, Open Government Licence v3.0. Information may have changed since that date and is not advice or a credit reference; check the official record before relying on it. Official record: https://find-and-update.company-information.service.gov.uk/company/15377020
HTML: https://firmoscan.com/company/15377020-boiler-upgrade-ltd