NOVELTY - The product has a set of instructions for obtaining a geographic location of an architectural structure (106). Location-related data regarding the geographic location is obtained (109). Three-dimensional data representing the structure is extracted (112) from the structure. A design option is applied (115) to the structure using the three-dimensional data. Impact of applying the design option to the structure is analyzed (118) using the three-dimensional data and the location-related data to produce analysis data. A feature of the structure is determined (121) based on the analysis data.    USE - Computer program product for analyzing design option e.g. change in three-dimensional data, equipment choice such as water heating choice and fan/pump/motor choice, energy source choice such as nuclear choice, coal choice, gas choice, off-site renewable choice, on-site renewable choice, wind turbine choice, fuel cell choice, solar choice and hydropower choice, water source choice such as rainwater choice and water main choice, heating choice, cooling choice and construction type choice (all claimed) such as structure type choice e.g. concrete type choice, wall type e.g. curtain type choice, fenestration type choice e.g. single glass window type choice, roof type choice e.g. slope frame type choice, floor type choice e.g. low weight concrete type choice and fill in insulation type choice e.g. poly-isocyanurate type choice, of an architectural structure e.g. building such as apartment building, auditorium, single or multi-story house containing living room, kitchen and toilet, office building, warehouse, bridge and tunnel, by a designer i.e. architect.    ADVANTAGE - The product enables providing a sustainability analysis on an architectural structure design created using CAD tool and applying design option to the design of the architecture to improve sustainability, thus providing user with easier access and better collaboration between and among design team members. The product enables simplifying the three-dimensional geometric data extracted from an architectural structure, thus reducing analysis time. The product enables architectural structure model object to be utilized to partition two-dimensional space, so that properties regarding the architectural structure can be efficiently retrieved.    DETAILED DESCRIPTION - The location-related data is selected from a group consisting of weather data, altitude data, energy source option, water source, information about architectural structure neighboring another architectural structure, demographic information, development information, transportation option, environmental information and construction zoning and code data. The three-dimensional data is a building geometry. The feature is selected from a group consisting of energy consumption, water consumption, compliance of the architectural structure with a construction standard, thermal characteristic, carbon footprint, indoor environment quality, construction material equipment item, construction cost, operational cost and maintenance cost. An INDEPENDENT CLAIM is also included for a computer system for analyzing an architectural structure.    DESCRIPTION OF DRAWING(S) - The drawing shows a flow diagram illustrating a method for analyzing architectural structures.    Method for analyzing architectural structures (100)    Step for obtaining geographic location of architectural structure (106)    Step for obtaining location-related data regarding the geographic location (109)    Step for extracting three-dimensional data representing architectural structure (112)    Step for applying design option to architectural structure (115)    Step for analyzing design option to architectural structure (118)    Step for determining feature of structure based on analysis data (121)