Perimeter block housing has been implemented in various new town development in Korea since 2000 as an alternative urban housing type as verse to high-rise development mostly common in urban residential areas. Perimeter blocks are relatively new built forms in Korea and considered more inferior in natural daylighting to free-standing buildings. Natural light is one of the most important amenities to insure inhabitable residential spaces, and perimeter block housing has to be carefully designed in consideration of natural daylighting. The objective of this research is to develop a design methodology of Perimeter block housing with the optimization of natural daylighting satisfying Rights to light. The case of Eunpyung Newtown is analyzed extensively in order to define the principles of solar shading and daylighting in Seoul. The result shows that the minimum distances between perimeter block housing, south-north=1.8h, east-west=0.7h, need to be satisfied in order to meet minium two hours of daylighting for the livingroom windows facing south or east. In addition, The minium distance between the buildings at each $15^{circ}$ azimuth angle is calculated based on the daylighting simulation. Azimuth angle $45^{circ}$, $60^{circ}$, $-30^{circ}$, and $-45^{circ}$ are turned out to be the optimum azimuth angle. The design explorations are implemented to the preliminary massing of perimeter block housing using the principles of south-north=1.8h for closed blocks and the principles of minium distances between the buildings at various azimuth angle for open blocks with tower. The simulations are verified that the design alternatives meet the standard of Rights to light and the high Floor Area Ratio(FAR).