Residential buildings represent a core component of our built environments and our environmental impact. Fortunately, buildings efficiency measures are often lower-hanging fruit that can have big impacts in reducing GHG emissions.
The Buildings Efficiency Guidance provides guidance for assessing the greenhouse gas (GHG) impacts of buildings sector energy efficiency policies. The guidance provides a stepwise approach for estimating the effects of policy design characteristics and barriers associated with regulatory and financial support policies on GHG impacts.
This guidance specifically covers regulatory and financial support policies that address both new building stock and existing building stock with retrofit. Users are guided on how to estimate the impacts of these policies for the residential sector, although this guidance may also be used for the commercial and public sectors. The guidance focuses on the assessment of impacts from built-in energy loads, including space heating, cooling, lighting and hot water. The guidance does not assess the impacts of appliances that are unrelated to heating, cooling and hot water.
The guidance helps users answer the following questions:
- How do mandatory and voluntary buildings codes and financial support policies influence GHG emissions reductions?
- How can users assess the impacts of these policies, as well as the influence of financial support policies and existing barriers?
Approaches covered in this guidance are applicable to three commonly implemented policies: mandatory building codes for new and existing buildings, voluntary building codes for new buildings and standalone financial support policies for the renovation of existing building stock.
The May 2018 version of guidance is now available. Click here for the full guidance document or use the sections below to navigate to a specific topic. Click here for an introduction to the methodology. Please note that the full guidance document will be revised in the future.
These chapters provide an introduction to the guidance and an overview of objectives users may have in assessing the GHG impacts of buildings policies. This section should be read to understand whether to use the guidance and to determine what objectives it will be used for.
This section provides an overview of buildings sector policies and identifies the policies to which this guidance can be applied. It also lays out an overview of the steps involved in assessing the GHG impacts of buildings policies, and provides guidance on planning the assessment.
In this chapter, users will get guidance on the first step of the assessment process, describing the policy that will be assessed. Guidance is also provided on deciding whether to assess an individual policy or a package of related policies and choosing whether to carry out an ex-ante (forward-looking) or ex-post (backward-looking) assessment.
This chapter provides guidance for identifying the most common GHG impacts of buildings policies. This section also guides users in developing a causal chain by considering how the policy will be implemented, who will be affected by the policy, what the potential intermediate effects of the policy will be, and how these effects cause GHG impacts.
The guidance in Chapter 7 can be used for determining the baseline scenario, or the conditions most likely to occur in the absence of the policy being assessed. Guidance is provided for estimating the expected future GHG impacts of the policy in Chapter 8. Users estimate values for all parameters in the policy scenario and calculate expected GHG emissions. The obtained GHG emissions can either be used to compare the policy scenario emissions level to a sectoral target or to the baseline emissions. Guidance for assessing GHG impacts achieved by a policy to date is provided in Chapter 9. Ex-post estimates of emissions are based on observed data collected during the policy implementation period.
This section is relevant for all users. Chapter 10 identifies data and parameters to monitor over time and provides guidance on how to develop a monitoring plan. Chapter 11 provides a recommended list of information to be reported, which ensures the impact assessment is transparent and gives decision-makers and stakeholders the information they need to properly interpret the results.
These appendices provide a list of CDM methodologies that can be used to estimate GHG emission reductions for projects in the buildings sector and guidance on how to involve stakeholders in an impact assessment. The final section explains how the scope of this guidance was selected.
This section contains the glossary, abbreviations and acronyms, references and contributors.
This is a summary of the key recommendations provided throughout the guidance.