Jkk Builders Limited
Window & double glazing company registered in St. Helens, Merseyside
Registered address
15 SHERLOCK AVENUE, HAYDOCK, St. Helens WA11 0QL
✓ Active on Companies House
Companies House number14226569
IncorporatedJuly 2022
4 years on the register
4 years on the register
Company typePrivate Limited Company
Trade (SIC 43320)Joinery installation (windows, doors & frames)
Accounts on fileMicro-entity accounts (smallest filing band) · last filed July 2025 · next due April 2027
Also registered for43210 - Electrical installation; 43220 - Plumbing, heat and air-conditioning installation; 43390 - Other building completion and finishing
Listed from the public Companies House register, not an endorsement. Quote requests go to FENSA or Certass registered installers covering your postcode, not necessarily this company. Accounts filing category reflects company size under Companies House rules, not service quality. Map location is approximate, based on the registered postcode.
Before you book Jkk Builders Limited
This page confirms the company is on the Companies House register. It does not confirm FENSA or Certass registration, insurance, or trading status. Check those yourself first.
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How much does window replacement cost in St. Helens?
A single uPVC window in St. Helens typically runs £300 to £600 supplied and fitted; a full house of 8 to 10 windows is often £3,000 to £8,000 depending on style (casement, bay, sash-look) and glazing spec. Get two or three written, itemised quotes before agreeing to work.
What is a FENSA or Certass certificate and why does it matter?
It's proof the window or door installation meets Building Regulations (thermal performance, safety glazing, ventilation) without a separate council building control sign-off. Without one, selling the property can mean paying for retrospective building control inspection or indemnity insurance, so keep the certificate with your house documents.
Does a listing here mean Jkk Builders Limited is recommended?
No. Companies appear in this directory because they are on the Companies House register under a window/joinery installation trade code. A listing is not vetting, endorsement, or a guarantee that the company is trading or FENSA/Certass registered.
How many window and glazing companies are there in Merseyside?
This directory holds 729 active window and glazing businesses across 43 towns in Merseyside, all from the Companies House register. St. Helens accounts for 38, among the county's busiest. About 41% of Merseyside's registered window and glazing firms were incorporated in the last three years, so weigh incorporation date and FENSA/Certass registration, not just company age.