There were two phases in the restoration process :
1. Phase 1 (Stabilization)
The buildings were repaired and physically restored to good condition. For example, damp-proofing, roof, and foundation repairing. Foundation repairs were carried out to stop subsidence.
2. Phase 2 (Rehabilitation)
The buildings were restored architecturally in accordance with original plans, but suitable for present day use. For example, interior decoration, painting, etc. In phase 2, there were many adjustments and redesigns, because the building had changed architecturally through the years.
The final design had to be based on the original style, but to be of use as a comtemporary buildings for presentations and present day usage, importantly, it was to harmonize with the setting and historical background. Therefore, the new design presented to the committee as a final plan included comparative studies with possible choices and terms of architectural perspective.
In both phases, extensive historical research was conducted from annals, memoirs, and old photographs. Conditions prior to commencement of restoration were surveyed with on-site measurements, foundation assessment, decorations, and use of color. Problems were pin-pointed through records, notes, photos, and in coordination with diggings and layering of the soil, gave a general overview of the problems . The information was used for decision--making in the final stage of design, approach and conclusion of the restoration. Within the ancient palace, the buildings and structures which were restored are as follows :
1. The Throne Hall
2. The King Pinklao's Residence
3. The Larger Chinese Style Residence
4. The Smaller Chinese Style Residence
5. King Taksin's Shrine
6. Whale Head Shrine
7. The Green House
8. Wichaiprasit Fort
The main restorations of each building comprised repair of the roofs, ceilings, walls, pillars, floors, stairs, doors and windows as well as the infrastructure of the building.