Will I lose google ranking if I redesign or redevelop my website?

If you talk about the normal process - answer is Yes.

Yes, redesigning or redeveloping your website can potentially cause a temporary drop in your Google ranking, especially if significant changes are made to the site structure, URLs, or content, without proper implementation of SEO best practices like 301 redirects to maintain backlinks and preserve page authority; however, with careful planning and execution, you can minimize the impact and even potentially improve your rankings by optimizing for user experience and technical SEO factors in the new design. 

Key points to remember:

Backlinks are crucial:
When redesigning, prioritize maintaining backlinks from other websites to your pages by using 301 redirects to direct users and search engines to the new URLs on your redesigned site. 

URL structure matters:
Try to keep your old URL structure as much as possible to avoid broken links and maintain page authority. 

Content optimization:
Ensure your important content is transferred to the new site, and update it as needed to align with the redesigned layout. 

Mobile friendliness:
Make sure your new design is fully optimized for mobile devices. 

Testing and monitoring:
Test your redesigned site thoroughly on a staging environment and monitor your rankings closely after launch to identify any issues and make adjustments.

But if you talk about EnquiryGate process. If you redesign, redevelop or upgrade your website without EnquiryGate system - So there might be even benefit in terms of SEO instead of lose in ranking. And this is why because EnquiryGate takes SEO on priority when ever host any new template or layout for our users.

While giving upgrade options Team EnquiryGate take cares of :-

Backlinks are crucial
URL structure matters
Content optimization
Mobile friendliness