diff --git a/coderd/database/db2sdk/db2sdk.go b/coderd/database/db2sdk/db2sdk.go
index 4a7871f21d15d..e926844d2b156 100644
--- a/coderd/database/db2sdk/db2sdk.go
+++ b/coderd/database/db2sdk/db2sdk.go
@@ -21,6 +21,7 @@ import (
 	"github.com/coder/coder/v2/coderd/rbac"
 	"github.com/coder/coder/v2/coderd/rbac/policy"
 	"github.com/coder/coder/v2/coderd/render"
+	"github.com/coder/coder/v2/coderd/util/ptr"
 	"github.com/coder/coder/v2/coderd/workspaceapps/appurl"
 	"github.com/coder/coder/v2/codersdk"
 	"github.com/coder/coder/v2/provisionersdk/proto"
@@ -96,6 +97,49 @@ func TemplateVersionParameters(params []database.TemplateVersionParameter) ([]co
 	return out, nil
 }
 
+func TemplateVersionParameterFromPreview(param previewtypes.Parameter) (codersdk.TemplateVersionParameter, error) {
+	descriptionPlaintext, err := render.PlaintextFromMarkdown(param.Description)
+	if err != nil {
+		return codersdk.TemplateVersionParameter{}, err
+	}
+
+	sdkParam := codersdk.TemplateVersionParameter{
+		Name:                 param.Name,
+		DisplayName:          param.DisplayName,
+		Description:          param.Description,
+		DescriptionPlaintext: descriptionPlaintext,
+		Type:                 string(param.Type),
+		FormType:             string(param.FormType),
+		Mutable:              param.Mutable,
+		DefaultValue:         param.DefaultValue.AsString(),
+		Icon:                 param.Icon,
+		Required:             param.Required,
+		Ephemeral:            param.Ephemeral,
+		Options:              List(param.Options, TemplateVersionParameterOptionFromPreview),
+		// Validation set after
+	}
+	if len(param.Validations) > 0 {
+		validation := param.Validations[0]
+		sdkParam.ValidationError = validation.Error
+		if validation.Monotonic != nil {
+			sdkParam.ValidationMonotonic = codersdk.ValidationMonotonicOrder(*validation.Monotonic)
+		}
+		if validation.Regex != nil {
+			sdkParam.ValidationRegex = *validation.Regex
+		}
+		if validation.Min != nil {
+			//nolint:gosec // No other choice
+			sdkParam.ValidationMin = ptr.Ref(int32(*validation.Min))
+		}
+		if validation.Max != nil {
+			//nolint:gosec // No other choice
+			sdkParam.ValidationMax = ptr.Ref(int32(*validation.Max))
+		}
+	}
+
+	return sdkParam, nil
+}
+
 func TemplateVersionParameter(param database.TemplateVersionParameter) (codersdk.TemplateVersionParameter, error) {
 	options, err := templateVersionParameterOptions(param.Options)
 	if err != nil {
@@ -299,6 +343,15 @@ func templateVersionParameterOptions(rawOptions json.RawMessage) ([]codersdk.Tem
 	return options, nil
 }
 
+func TemplateVersionParameterOptionFromPreview(option *previewtypes.ParameterOption) codersdk.TemplateVersionParameterOption {
+	return codersdk.TemplateVersionParameterOption{
+		Name:        option.Name,
+		Description: option.Description,
+		Value:       option.Value.AsString(),
+		Icon:        option.Icon,
+	}
+}
+
 func OAuth2ProviderApp(accessURL *url.URL, dbApp database.OAuth2ProviderApp) codersdk.OAuth2ProviderApp {
 	return codersdk.OAuth2ProviderApp{
 		ID:          dbApp.ID,
diff --git a/coderd/dynamicparameters/static.go b/coderd/dynamicparameters/static.go
index 14988a2d162c0..fec5de2581aef 100644
--- a/coderd/dynamicparameters/static.go
+++ b/coderd/dynamicparameters/static.go
@@ -28,6 +28,12 @@ func (r *loader) staticRender(ctx context.Context, db database.Store) (*staticRe
 	}
 
 	params := db2sdk.List(dbTemplateVersionParameters, TemplateVersionParameter)
+
+	for i, param := range params {
+		// Update the diagnostics to validate the 'default' value.
+		// We do not have a user supplied value yet, so we use the default.
+		params[i].Diagnostics = append(params[i].Diagnostics, previewtypes.Diagnostics(param.Valid(param.Value))...)
+	}
 	return &staticRender{
 		staticParams: params,
 	}, nil
@@ -137,7 +143,5 @@ func TemplateVersionParameter(it database.TemplateVersionParameter) previewtypes
 	// unfortunate we have to do this, but it will return the default form_type
 	// for a given set of conditions.
 	_, param.FormType, _ = provider.ValidateFormType(provider.OptionType(param.Type), len(param.Options), param.FormType)
-
-	param.Diagnostics = append(param.Diagnostics, previewtypes.Diagnostics(param.Valid(param.Value))...)
 	return param
 }
diff --git a/coderd/wsbuilder/wsbuilder.go b/coderd/wsbuilder/wsbuilder.go
index a996d1594a50d..577ec5eca4577 100644
--- a/coderd/wsbuilder/wsbuilder.go
+++ b/coderd/wsbuilder/wsbuilder.go
@@ -14,11 +14,13 @@ import (
 	"github.com/hashicorp/hcl/v2/hclsyntax"
 
 	"github.com/coder/coder/v2/apiversion"
+	"github.com/coder/coder/v2/coderd/dynamicparameters"
 	"github.com/coder/coder/v2/coderd/rbac/policy"
 	"github.com/coder/coder/v2/coderd/util/ptr"
 	"github.com/coder/coder/v2/provisioner/terraform/tfparse"
 	"github.com/coder/coder/v2/provisionersdk"
 	sdkproto "github.com/coder/coder/v2/provisionersdk/proto"
+	previewtypes "github.com/coder/preview/types"
 
 	"github.com/google/uuid"
 	"github.com/sqlc-dev/pqtype"
@@ -71,7 +73,7 @@ type Builder struct {
 	templateVersion                      *database.TemplateVersion
 	templateVersionJob                   *database.ProvisionerJob
 	terraformValues                      *database.TemplateVersionTerraformValue
-	templateVersionParameters            *[]database.TemplateVersionParameter
+	templateVersionParameters            *[]previewtypes.Parameter
 	templateVersionVariables             *[]database.TemplateVersionVariable
 	templateVersionWorkspaceTags         *[]database.TemplateVersionWorkspaceTag
 	lastBuild                            *database.WorkspaceBuild
@@ -716,7 +718,7 @@ func (b *Builder) getParameters() (names, values []string, err error) {
 	}
 
 	for _, templateVersionParameter := range templateVersionParameters {
-		tvp, err := db2sdk.TemplateVersionParameter(templateVersionParameter)
+		tvp, err := db2sdk.TemplateVersionParameterFromPreview(templateVersionParameter)
 		if err != nil {
 			return nil, nil, BuildError{http.StatusInternalServerError, "failed to convert template version parameter", err}
 		}
@@ -780,7 +782,7 @@ func (b *Builder) getLastBuildParameters() ([]database.WorkspaceBuildParameter,
 	return values, nil
 }
 
-func (b *Builder) getTemplateVersionParameters() ([]database.TemplateVersionParameter, error) {
+func (b *Builder) getTemplateVersionParameters() ([]previewtypes.Parameter, error) {
 	if b.templateVersionParameters != nil {
 		return *b.templateVersionParameters, nil
 	}
@@ -792,8 +794,8 @@ func (b *Builder) getTemplateVersionParameters() ([]database.TemplateVersionPara
 	if err != nil && !xerrors.Is(err, sql.ErrNoRows) {
 		return nil, xerrors.Errorf("get template version %s parameters: %w", tvID, err)
 	}
-	b.templateVersionParameters = &tvp
-	return tvp, nil
+	b.templateVersionParameters = ptr.Ref(db2sdk.List(tvp, dynamicparameters.TemplateVersionParameter))
+	return *b.templateVersionParameters, nil
 }
 
 func (b *Builder) getTemplateVersionVariables() ([]database.TemplateVersionVariable, error) {