This document provides best practice guidance and energy--efficiency recommendations for the design, construction, and operation of high--performance office buildings in India. Through a discussion of learnings from exemplary projects and inputs from experts, it provides recommendations that can potentially help achieve (1) enhanced working environments, (2) economic construction/faster payback, (3) reduced operating costs, and (4) reduced greenhouse gas (GHG) emissions. It also provides ambitious (but achievable) energy performance benchmarks, both as adopted targets during building modeling (design phase) and during measurement and verification (operations phase). These benchmarks have been derived from a set of representative best--in--class office buildings in India. The best practices strategies presented in this guide would ideally help in delivering high--performance in terms of a triad-of energy efficiency, cost efficiency, and occupant comfort and well--being. These best practices strategies and metrics should be normalized-that is, corrected to account for building characteristics, diversity of operations, weather, and materials and construction methods. Best practices should start by using early design principles at the whole building level. Optimal energy efficiency can be achieved through an integrated design process (IDP), with stakeholder buy--in from the beginning at the conceptual design phase. Early in the project, the focus of the stakeholder group should be on maximizing energy efficiency of the building as a whole, and not just on the efficiency of an individual building component or system. Through multi--disciplinary interactions, the design team should explore synergies between systems such as mutually resonating strategies; or sweet spots between inharmonious strategies. Buildings are the most energy efficient when designers and operators ensure that systems throughout the building are both efficient themselves, and work efficiently together. Systems integration and operational monitoring at the whole building level can help push the envelope for building energy efficiency and performance to unprecedented levels. Whole--building systems integration throughout the building's design, construction, and operation can assure high performance, both in terms of ensures the energy efficiency and comfort/service levels. A Life cycle Performance Assurance Framework emphasizes the critical integration between the buildings' physical systems and the building information technologies. The building physical systems include envelope, HVAC, plugs, lighting and comfort technology systems. Whereas, building information technologies provide information on the design and functioning of the building physical systems. This can be done--first, by performing building energy simulation and modeling at the design phase one can estimate the building's energy performance and code compliance; second, by integrating controls and sensors for communications, one can track real--time performance at the building phase, r...