diff --git a/cmd/webhook/main.go b/cmd/webhook/main.go
index 42c339060d7..913dacfef19 100644
--- a/cmd/webhook/main.go
+++ b/cmd/webhook/main.go
@@ -20,6 +20,8 @@ import (
 	"flag"
 	"log"
 
+	"github.com/knative/build-pipeline/pkg/apis/pipeline/v1alpha1"
+
 	"go.uber.org/zap"
 
 	"github.com/knative/build-pipeline/pkg/logging"
@@ -78,10 +80,12 @@ func main() {
 	}
 	//TODO add validations here
 	controller := webhook.AdmissionController{
-		Client:   kubeClient,
-		Options:  options,
-		Handlers: map[schema.GroupVersionKind]webhook.GenericCRD{},
-		Logger:   logger,
+		Client:  kubeClient,
+		Options: options,
+		Handlers: map[schema.GroupVersionKind]webhook.GenericCRD{
+			v1alpha1.SchemeGroupVersion.WithKind("Pipeline"): &v1alpha1.Pipeline{},
+		},
+		Logger: logger,
 	}
 	if err != nil {
 		logger.Fatal("Failed to create the admission controller", zap.Error(err))
diff --git a/pkg/apis/pipeline/v1alpha1/metadata_validation.go b/pkg/apis/pipeline/v1alpha1/metadata_validation.go
new file mode 100644
index 00000000000..64a064f2917
--- /dev/null
+++ b/pkg/apis/pipeline/v1alpha1/metadata_validation.go
@@ -0,0 +1,40 @@
+/*
+Copyright 2018 The Knative Authors
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1alpha1
+
+import (
+	"strings"
+
+	"github.com/knative/pkg/apis"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+)
+
+func validateObjectMetadata(meta metav1.Object) *apis.FieldError {
+	name := meta.GetName()
+
+	if strings.Contains(name, ".") {
+		return &apis.FieldError{
+			Message: "Invalid resource name: special character . must not be present",
+			Paths:   []string{"name"},
+		}
+	}
+
+	if len(name) > 63 {
+		return &apis.FieldError{
+			Message: "Invalid resource name: length must be no more than 63 characters",
+			Paths:   []string{"name"},
+		}
+	}
+	return nil
+}
diff --git a/pkg/apis/pipeline/v1alpha1/pipeline_defaults.go b/pkg/apis/pipeline/v1alpha1/pipeline_defaults.go
new file mode 100644
index 00000000000..31d81c538a4
--- /dev/null
+++ b/pkg/apis/pipeline/v1alpha1/pipeline_defaults.go
@@ -0,0 +1,25 @@
+/*
+Copyright 2018 The Knative Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1alpha1
+
+func (p *Pipeline) SetDefaults() {
+	p.Spec.SetDefaults()
+}
+
+func (ps *PipelineSpec) SetDefaults() {
+	ps.SetDefaults()
+}
diff --git a/pkg/apis/pipeline/v1alpha1/pipeline_validation.go b/pkg/apis/pipeline/v1alpha1/pipeline_validation.go
new file mode 100644
index 00000000000..bf918a1990a
--- /dev/null
+++ b/pkg/apis/pipeline/v1alpha1/pipeline_validation.go
@@ -0,0 +1,37 @@
+/*
+Copyright 2018 The Knative Authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1alpha1
+
+import (
+	"github.com/knative/pkg/apis"
+	"k8s.io/apimachinery/pkg/api/equality"
+)
+
+func (p *Pipeline) Validate() *apis.FieldError {
+	if err := validateObjectMetadata(p.GetObjectMeta()); err != nil {
+		return err.ViaField("metadata")
+	}
+	return nil
+}
+
+func (ps *PipelineSpec) Validate() *apis.FieldError {
+	if equality.Semantic.DeepEqual(ps, &PipelineSpec{}) {
+		return apis.ErrMissingField(apis.CurrentField)
+	}
+
+	return nil
+}