diff --git a/errors.go b/errors.go
new file mode 100644
index 0000000..e47aff1
--- /dev/null
+++ b/errors.go
@@ -0,0 +1,188 @@
+package gophercloud
+
+import "fmt"
+
+// BaseError is an error type that all other error types embed.
+type BaseError struct {
+	OriginalError string
+	Function      string
+}
+
+func (e *BaseError) Error() string {
+	return "An error occurred while executing a Gophercloud request."
+}
+
+// ErrInvalidInput is an error type used for most non-HTTP Gophercloud errors.
+type ErrInvalidInput struct {
+	BaseError
+	Argument string
+	Value    interface{}
+}
+
+func (e *ErrInvalidInput) Error() string {
+	return fmt.Sprintf("Invalid input provided for argument [%s]: [%+v]", e.Argument, e.Value)
+}
+
+// ErrUnexpectedResponseCode is returned by the Request method when a response code other than
+// those listed in OkCodes is encountered.
+type ErrUnexpectedResponseCode struct {
+	BaseError
+	URL      string
+	Method   string
+	Expected []int
+	Actual   int
+	Body     []byte
+}
+
+func (err *ErrUnexpectedResponseCode) Error() string {
+	return fmt.Sprintf(
+		"Expected HTTP response code %v when accessing [%s %s], but got %d instead\n%s",
+		err.Expected, err.Method, err.URL, err.Actual, err.Body,
+	)
+}
+
+type ErrDefault400 struct {
+	*ErrUnexpectedResponseCode
+}
+type ErrDefault401 struct {
+	*ErrUnexpectedResponseCode
+}
+type ErrDefault404 struct {
+	*ErrUnexpectedResponseCode
+}
+type ErrDefault405 struct {
+	*ErrUnexpectedResponseCode
+}
+type ErrDefault408 struct {
+	*ErrUnexpectedResponseCode
+}
+type ErrDefault429 struct {
+	*ErrUnexpectedResponseCode
+}
+type ErrDefault500 struct {
+	*ErrUnexpectedResponseCode
+}
+type ErrDefault503 struct {
+	*ErrUnexpectedResponseCode
+}
+
+func (e ErrDefault400) Error() string {
+	return "Invalid request due to incorrect syntax or missing required parameters."
+}
+func (e ErrDefault401) Error() string {
+	return "Authentication failed"
+}
+func (e ErrDefault404) Error() string {
+	return "Resource not found"
+}
+func (e ErrDefault405) Error() string {
+	return "Method not allowed"
+}
+func (e ErrDefault408) Error() string {
+	return "The server timed out waiting for the request"
+}
+func (e ErrDefault429) Error() string {
+	return "Too many requests have been sent in a given amount of time. Pause requests, wait up to one minute, and try again."
+}
+func (e ErrDefault500) Error() string {
+	return "Internal Server Error"
+}
+func (e ErrDefault503) Error() string {
+	return "The service is currently unable to handle the request due to a temporary overloading or maintenance. This is a temporary condition. Try again later."
+}
+
+// Err400er is the interface resource error types implement to override the error message
+// from a 400 error.
+type Err400er interface {
+	Error400(*ErrUnexpectedResponseCode) error
+}
+
+// Err401er is the interface resource error types implement to override the error message
+// from a 401 error.
+type Err401er interface {
+	Error401(*ErrUnexpectedResponseCode) error
+}
+
+// Err404er is the interface resource error types implement to override the error message
+// from a 404 error.
+type Err404er interface {
+	Error404(*ErrUnexpectedResponseCode) error
+}
+
+// Err405er is the interface resource error types implement to override the error message
+// from a 405 error.
+type Err405er interface {
+	Error405(*ErrUnexpectedResponseCode) error
+}
+
+// Err408er is the interface resource error types implement to override the error message
+// from a 408 error.
+type Err408er interface {
+	Error408(*ErrUnexpectedResponseCode) error
+}
+
+// Err429er is the interface resource error types implement to override the error message
+// from a 429 error.
+type Err429er interface {
+	Error429(*ErrUnexpectedResponseCode) error
+}
+
+// Err500er is the interface resource error types implement to override the error message
+// from a 500 error.
+type Err500er interface {
+	Error500(*ErrUnexpectedResponseCode) error
+}
+
+// Err503er is the interface resource error types implement to override the error message
+// from a 503 error.
+type Err503er interface {
+	Error503(*ErrUnexpectedResponseCode) error
+}
+
+type ErrTimeOut struct {
+	*BaseError
+}
+
+func (e *ErrTimeOut) Error() string {
+	return "A time out occurred"
+}
+
+type ErrUnableToReauthenticate struct {
+	*BaseError
+}
+
+func (e *ErrUnableToReauthenticate) Error() string {
+	return fmt.Sprintf("Unable to re-authenticate: %s", e.OriginalError)
+}
+
+type ErrErrorAfterReauthentication struct {
+	*BaseError
+}
+
+func (e *ErrErrorAfterReauthentication) Error() string {
+	return fmt.Sprintf("Successfully re-authenticated, but got error executing request: %s", e.OriginalError)
+}
+
+// ErrServiceNotFound is returned when no service in a service catalog matches
+// the provided EndpointOpts. This is generally returned by provider service
+// factory methods like "NewComputeV2()" and can mean that a service is not
+// enabled for your account.
+type ErrServiceNotFound struct {
+	*BaseError
+}
+
+func (e *ErrServiceNotFound) Error() string {
+	return "No suitable service could be found in the service catalog."
+}
+
+// ErrEndpointNotFound is returned when no available endpoints match the
+// provided EndpointOpts. This is also generally returned by provider service
+// factory methods, and usually indicates that a region was specified
+// incorrectly.
+type ErrEndpointNotFound struct {
+	*BaseError
+}
+
+func (e *ErrEndpointNotFound) Error() string {
+	return "No suitable endpoint could be found in the service catalog."
+}