How to add a subdomain website in Plesk

Create the subdomain

Add it under the correct parent domain

1. Open My Services, select the hosting service and log in to Plesk.
2. Open Websites & Domains and choose Add Subdomain.
3. Enter only the prefix, such as shop, and select the correct parent domain.
4. Review the suggested document root. Use a dedicated folder unless content is intentionally shared.
5. Select OK or Add Subdomain.
6. Upload content, install the application or open Sitejet Builder if available.

DNS connection

Make the new name resolve to the hosting server

If Plesk hosts the authoritative DNS zone, it normally creates the required record. If DNS is managed elsewhere, add an A or CNAME record there using the destination supplied for the hosting service.

Secure publishing

Add the subdomain to its certificate

1. Wait until the subdomain resolves publicly to the hosting server.
2. Open SSL/TLS Certificates or the Plesk security control for the site.
3. Issue or renew a certificate that includes the new subdomain.
4. Confirm https://subdomain.example.co.uk opens without a warning.
5. Enable HTTPS redirection only after that test succeeds.

Troubleshooting

If the subdomain does not open the expected website

Server not found

The public DNS record is absent or has not reached the resolver being used.

Plesk page appears

The name reaches the server but is not mapped to the expected Plesk object.

Parent website appears

Check the subdomain object and its document root; a wildcard or shared root may be taking effect.

403 or empty page

Check files, index page, permissions and application deployment in the subdomain document root.

Certificate warning

The subdomain is not covered by the selected certificate or DNS still points elsewhere.