Systems and methods for upgrading an offshore wellhead platform include identifying existing wells on an offshore wellhead platform that are capable to produce hydrocarbons for a specified time period; determining that an existing platform structure of the offshore wellhead platform is unable to accommodate additional loads from new equipment and upgrades when at least 50% of the existing wells on the offshore wellhead platform are capable to produce hydrocarbons for the specified time period; determining that the existing platform structure is unable to accommodate addition of two piles to support the additional loads from new equipment and upgrades; determining that the existing wells will handle horizontal loads when the existing platform structure is removed; and performing a slipover platform upgrade to the offshore wellhead platform when the existing wells will handle horizontal loads.