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Bespoke timber sash windows and doors, made in Essex and fitted across London
Key facts
- Trading name
- Prime Sash Windows
- Registered company
- Skylon Joinery Limited
- Company number
- 12946103 (Companies House, status Active, checked 24 October 2026)
- Established
- 2020
- Registered office
- Nazeing, Essex
- Areas covered
- London and areas within about 25 miles
- Registration
- Companies House 12946103, Skylon Joinery Limited, active, incorporated 13 October 2020, which trades as Prime Sash Windows. The registered office is in Hatfield, while the workshop is at Leaside Industrial Park, Nazeing. The claim came from an address on the business’s own website domain. Checked 15 September 2026.
- Qualifications
- FENSA registered and PAS 24 security certified (both stated on the business website, not checked by Whito)
- Services
- Timber sash windows, Casement windows, Timber doors, Design and manufacture, Survey and installation
- Phone
- 07842 510060
- Website
- primesashwindows.co.uk
- Listing status
- Verified. The business has claimed this listing and confirmed its details with Whito
- Listing last updated
- 24 October 2026
What Whito has checked
- Listed: yes. Public entry since 15 September 2026
- Companies House matched: yes. Company 12946103, Active, read 24 October 2026
- Claimed: yes. The business has claimed this listing
- Verified: yes. Whito confirmed identity, contact and claim
- Regulator checked: no. No regulator register read by Whito
- Company record
- Companies House shows Active for company 12946103, read on 24 October 2026. See the register entry
- Regulator register
- No regulator or scheme registration is recorded on this listing.
- Listing ownership
- Verified. Whito has confirmed the business’s identity and a working contact. Verified is not a recommendation.
- Website check
- 82 out of 100 on the Whito Visibility Check of primesashwindows.co.uk, run on 25 October 2026. Biggest gaps: company number on the site, llms.txt guide, FAQ schema. Run the check again, free The score measures how easily people and AI assistants can read and trust the website, across 17 checks such as a secure connection, a visible company number and address, and structured data. It is not a rating of the business or its work. Run this business and want the score removed? Email hello@whito.co.uk.
- AI answers
- No AI answers recorded for this business yet. Whito’s AI studies cover selected trades and towns, so no record does not mean AI assistants never name it. Want this tracked every month? Visibility Monitor, £280 a month. Paying never changes this listing.
Each line means only what it says. Listed, matched, claimed, verified and regulator checked are separate states, and none of them is a recommendation. How Whito collects its data
About Prime Sash Windows
Prime Sash Windows makes bespoke timber sash and casement windows and doors in its own workshop at Nazeing, Essex, and fits them across London and the surrounding area.
The business offers free site surveys within about 25 miles of London and says installation is carried out by FENSA registered teams. It trades through Skylon Joinery Limited, registered in 2020.
What to check before you book
Some details here come from public sources and some from the business itself, so confirm these directly with the business before any work starts.
- Confirm the business holds the right registration or accreditation for the work, and that it is current.
- Get the quote in writing, and ask whether it includes parts, certification and VAT.
- Ask for proof of public liability insurance before work begins.
- Ask for any certificates relevant to the work once it is done.
Common questions
What areas does Prime Sash Windows cover?
Prime Sash Windows covers London and areas within about 25 miles.
Is Prime Sash Windows registered?
Whito records: Companies House 12946103, Skylon Joinery Limited, active, incorporated 13 October 2020, which trades as Prime Sash Windows. The registered office is in Hatfield, while the workshop is at Leaside Industrial Park, Nazeing. The claim came from an address on the business’s own website domain. Checked 15 September 2026. Registration can change, so confirm the current registration number with the relevant scheme before you book.
Is this listing verified by Whito?
Yes. The business has claimed this listing, and Whito has confirmed its identity and a working contact. Where a registration scheme is shown above, check the current number on the scheme’s own register before booking. Whito does not publish invented reviews or star ratings.
Run Prime Sash Windows?
Manage this listing
Prime Sash Windows has claimed this listing and confirmed its details with Whito. There is nothing to buy here: every listing shows the same fields, and paying cannot move a listing.
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Update this listing
Details changed? Tell us and we will check and update them, free. To correct or remove a listing, email hello@whito.co.uk.
Update Prime Sash WindowsThis listing was claimed by the business, which has confirmed its details with Whito. Facts were also checked against public records including, where applicable, the Companies House register. A listing is not a recommendation or an endorsement. Always carry out your own checks before hiring. To correct or update this listing, use the update link above.
Product and company names shown on this listing may be the trademarks of their respective owners. A Whito listing does not imply any affiliation with, or endorsement by, them.
