Upgrading a collections storage area to meet current standards for safety, preservation and long-term care takes the work and advice of both in-house staff and experts from specific fields ranging from engineers, architects, HVAC installers and supplier that have worked in museums and understand the environmental parameters needed for the collection; vendors and manufacturers of museum storage equipment that can provide you with the appropriate equipment or advice, as well as knowledgeable staff that understand the current and long-term needs of the collection.
Think of this process in stages; outline the goals required to preserve the collection and what skills and experience will be needed, both from in-house staff and from expert service providers. Similar to hiring an architect or General Contractor to remodel or re-design your existing home, you may want to begin by seeking the advice of a project manager who will over see and represent the interest and goals of the museum.
Calling other museums in your area that have gone through the same process, as well as local conservators and collections managers, may provide valuable advice as you move forward with your project.