We are subject to extensive and complex laws and regulations that affect land development, homebuilding and apartment development processes, including laws and regulations related to zoning, permitted land uses, levels of density, building design, elevation of properties, water and waste disposal and use of open spaces. These regulations often provide broad discretion to the administering governmental authorities as to the conditions that must be met prior to development or construction being approved, if they are approved at all. We are also subject to determinations by governmental authorities as to the adequacy of water or sewage facilities, roads and other local services with regard to particular residential communities. New housing developments may also be subject to various assessments for schools, parks, streets and other public improvements. In addition, in many markets government authorities have implemented no growth or growth control initiatives. Any of these can limit, delay, or increase the costs of land development or home construction. Government restrictions, standards, or regulations intended to reduce greenhouse gas emissions or potential climate change impacts are likely to result in restrictions on land development in certain areas and may increase energy, transportation, or raw material costs, which could reduce our profit margins and adversely affect our results of operations. This is a particular concern in the western United States, where some of the most extensive and stringent environmental laws and residential building construction standards in the country have been enacted, and where we have substantial homebuilding and multifamily operations.
We are also subject to a variety of local, state and federal laws and regulations concerning protection of the environment. In some of the markets where we operate, we are required by law to pay environmental impact fees, use energy-saving construction materials and give commitments to municipalities to provide infrastructure such as roads and sewage systems. We generally are required to obtain permits, entitlements and approvals from local authorities to commence and carry out residential development or home construction. These permits, entitlements and approvals sometimes are opposed or challenged by local governments, environmental advocacy groups, neighboring property owners or other possibly interested parties, adding delays, costs and risks of non-approval to the process. Violations of environmental laws and regulations can result in injunctions, civil penalties, remediation expenses, and other costs. In addition, some environmental laws impose strict liability, which means that we may be held liable for unlawful environmental conditions on property we own which we did not create.
We are also subject to laws and regulations related to workers' health and safety, and there are efforts to subject homebuilders like us to other labor related laws or rules, some of which may make us responsible for things done by our subcontractors over which we have little or no control.
In addition, our residential mortgage subsidiary is subject to various state and federal statutes, rules and regulations, including those that relate to lending operations and other areas of mortgage origination and loan servicing. The impact of those statutes, rules and regulations can increase our homebuyers' costs of financing, and our cost of doing business, as well as restricting our homebuyers' access to some types of loans.
Our obligation to comply with the laws and regulations under which we operate, and our need to ensure that our associates, subcontractors and other agents comply with these laws and regulations, could result in delays in construction and land development, cause us to incur substantial costs and prohibit or restrict land development and homebuilding activity in certain areas in which we operate. Budget reductions by state and local governmental agencies may increase the time it takes to obtain required approvals and therefore may aggravate the delays we encounter. In 2020 and 2021, shutdowns of government offices in response to the COVID-19 pandemic often delayed the time it took to obtain required approvals. Government agencies also routinely initiate audits, reviews or investigations of our business practices to ensure compliance with applicable laws and regulations, which can cause us to incur costs or create other disruptions in our businesses that can be significant.