diff --git a/cluster-autoscaler/core/autoscaler_builder.go b/cluster-autoscaler/core/autoscaler_builder.go
new file mode 100644
index 0000000000..a238cfea4d
--- /dev/null
+++ b/cluster-autoscaler/core/autoscaler_builder.go
@@ -0,0 +1,70 @@
+/*
+Copyright 2017 The Kubernetes 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 core
+
+import (
+	"k8s.io/autoscaler/cluster-autoscaler/config/dynamic"
+	"k8s.io/autoscaler/cluster-autoscaler/simulator"
+	kube_util "k8s.io/autoscaler/cluster-autoscaler/utils/kubernetes"
+	kube_record "k8s.io/client-go/tools/record"
+	kube_client "k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
+)
+
+// AutoscalerBuilder builds an instance of Autoscaler which is the core of CA
+type AutoscalerBuilder interface {
+	SetDynamicConfig(config dynamic.Config) AutoscalerBuilder
+	Build() Autoscaler
+}
+
+// AutoscalerBuilderImpl builds new autoscalers from its state including initial `AutoscalingOptions` given at startup and
+// `dynamic.Config` read on demand from the configmap
+type AutoscalerBuilderImpl struct {
+	autoscalingOptions AutoscalingOptions
+	dynamicConfig      *dynamic.Config
+	kubeClient         kube_client.Interface
+	kubeEventRecorder  kube_record.EventRecorder
+	predicateChecker   *simulator.PredicateChecker
+	listerRegistry     kube_util.ListerRegistry
+}
+
+// NewAutoscalerBuilder builds an AutoscalerBuilder from required parameters
+func NewAutoscalerBuilder(autoscalingOptions AutoscalingOptions, predicateChecker *simulator.PredicateChecker, kubeClient kube_client.Interface, kubeEventRecorder kube_record.EventRecorder, listerRegistry kube_util.ListerRegistry) *AutoscalerBuilderImpl {
+	return &AutoscalerBuilderImpl{
+		autoscalingOptions: autoscalingOptions,
+		kubeClient:         kubeClient,
+		kubeEventRecorder:  kubeEventRecorder,
+		predicateChecker:   predicateChecker,
+		listerRegistry:     listerRegistry,
+	}
+}
+
+// SetDynamicConfig sets an instance of dynamic.Config read from a configmap so that
+// the new autoscaler built afterwards reflect the latest configuration contained in the configmap
+func (b *AutoscalerBuilderImpl) SetDynamicConfig(config dynamic.Config) AutoscalerBuilder {
+	b.dynamicConfig = &config
+	return b
+}
+
+// Build an autoscaler according to the builder's state
+func (b *AutoscalerBuilderImpl) Build() Autoscaler {
+	options := b.autoscalingOptions
+	if b.dynamicConfig != nil {
+		c := *(b.dynamicConfig)
+		options.NodeGroups = c.NodeGroupSpecStrings()
+	}
+	return NewStaticAutoscaler(options, b.predicateChecker, b.kubeClient, b.kubeEventRecorder, b.listerRegistry)
+}
diff --git a/cluster-autoscaler/core/dynamic_autoscaler.go b/cluster-autoscaler/core/dynamic_autoscaler.go
index 815cc86908..ce98ff58aa 100644
--- a/cluster-autoscaler/core/dynamic_autoscaler.go
+++ b/cluster-autoscaler/core/dynamic_autoscaler.go
@@ -23,11 +23,7 @@ import (
 	"github.com/golang/glog"
 	"k8s.io/autoscaler/cluster-autoscaler/config/dynamic"
 	"k8s.io/autoscaler/cluster-autoscaler/metrics"
-	"k8s.io/autoscaler/cluster-autoscaler/simulator"
 	"k8s.io/autoscaler/cluster-autoscaler/utils/errors"
-	kube_util "k8s.io/autoscaler/cluster-autoscaler/utils/kubernetes"
-	kube_record "k8s.io/client-go/tools/record"
-	kube_client "k8s.io/kubernetes/pkg/client/clientset_generated/clientset"
 )
 
 // DynamicAutoscaler is a variant of autoscaler which supports dynamic reconfiguration at runtime
@@ -85,48 +81,3 @@ func (a *DynamicAutoscaler) Reconfigure() error {
 
 	return nil
 }
-
-// AutoscalerBuilder builds an instance of Autoscaler which is the core of CA
-type AutoscalerBuilder interface {
-	SetDynamicConfig(config dynamic.Config) AutoscalerBuilder
-	Build() Autoscaler
-}
-
-// AutoscalerBuilderImpl builds new autoscalers from its state including initial `AutoscalingOptions` given at startup and
-// `dynamic.Config` read on demand from the configmap
-type AutoscalerBuilderImpl struct {
-	autoscalingOptions AutoscalingOptions
-	dynamicConfig      *dynamic.Config
-	kubeClient         kube_client.Interface
-	kubeEventRecorder  kube_record.EventRecorder
-	predicateChecker   *simulator.PredicateChecker
-	listerRegistry     kube_util.ListerRegistry
-}
-
-// NewAutoscalerBuilder builds an AutoscalerBuilder from required parameters
-func NewAutoscalerBuilder(autoscalingOptions AutoscalingOptions, predicateChecker *simulator.PredicateChecker, kubeClient kube_client.Interface, kubeEventRecorder kube_record.EventRecorder, listerRegistry kube_util.ListerRegistry) *AutoscalerBuilderImpl {
-	return &AutoscalerBuilderImpl{
-		autoscalingOptions: autoscalingOptions,
-		kubeClient:         kubeClient,
-		kubeEventRecorder:  kubeEventRecorder,
-		predicateChecker:   predicateChecker,
-		listerRegistry:     listerRegistry,
-	}
-}
-
-// SetDynamicConfig sets an instance of dynamic.Config read from a configmap so that
-// the new autoscaler built afterwards reflect the latest configuration contained in the configmap
-func (b *AutoscalerBuilderImpl) SetDynamicConfig(config dynamic.Config) AutoscalerBuilder {
-	b.dynamicConfig = &config
-	return b
-}
-
-// Build an autoscaler according to the builder's state
-func (b *AutoscalerBuilderImpl) Build() Autoscaler {
-	options := b.autoscalingOptions
-	if b.dynamicConfig != nil {
-		c := *(b.dynamicConfig)
-		options.NodeGroups = c.NodeGroupSpecStrings()
-	}
-	return NewStaticAutoscaler(options, b.predicateChecker, b.kubeClient, b.kubeEventRecorder, b.listerRegistry)
-}