diff --git a/src/components/Stepper/index.tsx b/src/components/Stepper/index.tsx
index 07ee8497..824a1c77 100644
--- a/src/components/Stepper/index.tsx
+++ b/src/components/Stepper/index.tsx
@@ -11,6 +11,7 @@ import Controls from './Controls'
 import GnoForm from 'src/components/forms/GnoForm'
 import Hairline from 'src/components/layout/Hairline'
 import { history } from 'src/store'
+import { LoadFormValues } from 'src/routes/load/container/Load'
 
 const transitionProps = {
   timeout: {
@@ -20,7 +21,7 @@ const transitionProps = {
 }
 
 export interface StepperPageFormProps {
-  values: Record<string, string>
+  values: LoadFormValues
   errors: Record<string, string>
   form: FormApi
 }
diff --git a/src/logic/contracts/safeContracts.ts b/src/logic/contracts/safeContracts.ts
index 384fcc8e..17345da0 100644
--- a/src/logic/contracts/safeContracts.ts
+++ b/src/logic/contracts/safeContracts.ts
@@ -5,7 +5,7 @@ import Web3 from 'web3'
 
 import { ETHEREUM_NETWORK } from 'src/config/networks/network.d'
 import { ZERO_ADDRESS } from 'src/logic/wallets/ethAddresses'
-import { calculateGasOf, calculateGasPrice } from 'src/logic/wallets/ethTransactions'
+import { calculateGasOf, EMPTY_DATA } from 'src/logic/wallets/ethTransactions'
 import { getWeb3, getNetworkIdFrom } from 'src/logic/wallets/getWeb3'
 import { GnosisSafe } from 'src/types/contracts/GnosisSafe.d'
 import { GnosisSafeProxyFactory } from 'src/types/contracts/GnosisSafeProxyFactory.d'
@@ -99,7 +99,7 @@ export const getSafeDeploymentTransaction = (
       safeAccounts,
       numConfirmations,
       ZERO_ADDRESS,
-      '0x',
+      EMPTY_DATA,
       DEFAULT_FALLBACK_HANDLER_ADDRESS,
       ZERO_ADDRESS,
       0,
@@ -120,7 +120,7 @@ export const estimateGasForDeployingSafe = async (
       safeAccounts,
       numConfirmations,
       ZERO_ADDRESS,
-      '0x',
+      EMPTY_DATA,
       DEFAULT_FALLBACK_HANDLER_ADDRESS,
       ZERO_ADDRESS,
       0,
@@ -130,14 +130,11 @@ export const estimateGasForDeployingSafe = async (
   const proxyFactoryData = proxyFactoryMaster.methods
     .createProxyWithNonce(safeMaster.options.address, gnosisSafeData, safeCreationSalt)
     .encodeABI()
-  const gas = await calculateGasOf({
+  return calculateGasOf({
     data: proxyFactoryData,
     from: userAccount,
     to: proxyFactoryMaster.options.address,
   })
-  const gasPrice = await calculateGasPrice()
-
-  return gas * parseInt(gasPrice, 10)
 }
 
 export const getGnosisSafeInstanceAt = (safeAddress: string): GnosisSafe => {
diff --git a/src/logic/hooks/useEstimateSafeCreationGas.tsx b/src/logic/hooks/useEstimateSafeCreationGas.tsx
new file mode 100644
index 00000000..40a712d0
--- /dev/null
+++ b/src/logic/hooks/useEstimateSafeCreationGas.tsx
@@ -0,0 +1,59 @@
+import { useEffect, useState } from 'react'
+import { useSelector } from 'react-redux'
+import { userAccountSelector } from '../wallets/store/selectors'
+import { estimateGasForDeployingSafe } from 'src/logic/contracts/safeContracts'
+import { fromTokenUnit } from 'src/logic/tokens/utils/humanReadableValue'
+import { formatAmount } from 'src/logic/tokens/utils/formatAmount'
+import { getNetworkInfo } from 'src/config'
+import { calculateGasPrice } from 'src/logic/wallets/ethTransactions'
+
+type EstimateSafeCreationGasProps = {
+  addresses: string[]
+  numOwners: number
+  safeCreationSalt: number
+}
+
+type SafeCreationEstimationResult = {
+  gasEstimation: number // Amount of gas needed for execute or approve the transaction
+  gasCostFormatted: string // Cost of gas in format '< | > 100'
+  gasLimit: number // Minimum gas requited to execute the Tx
+}
+
+const { nativeCoin } = getNetworkInfo()
+
+export const useEstimateSafeCreationGas = ({
+  addresses,
+  numOwners,
+  safeCreationSalt,
+}: EstimateSafeCreationGasProps): SafeCreationEstimationResult => {
+  const [gasEstimation, setGasEstimation] = useState<SafeCreationEstimationResult>({
+    gasEstimation: 0,
+    gasCostFormatted: '< 0.001',
+    gasLimit: 0,
+  })
+  const userAccount = useSelector(userAccountSelector)
+
+  useEffect(() => {
+    const estimateGas = async () => {
+      if (!addresses.length || !numOwners || !userAccount) {
+        return
+      }
+
+      const gasEstimation = await estimateGasForDeployingSafe(addresses, numOwners, userAccount, safeCreationSalt)
+      const gasPrice = await calculateGasPrice()
+      const estimatedGasCosts = gasEstimation * parseInt(gasPrice, 10)
+      const gasCost = fromTokenUnit(estimatedGasCosts, nativeCoin.decimals)
+      const gasCostFormatted = formatAmount(gasCost)
+
+      setGasEstimation({
+        gasEstimation,
+        gasCostFormatted,
+        gasLimit: gasEstimation,
+      })
+    }
+
+    estimateGas()
+  }, [numOwners, userAccount, safeCreationSalt, addresses])
+
+  return gasEstimation
+}
diff --git a/src/routes/load/components/ReviewInformation/index.tsx b/src/routes/load/components/ReviewInformation/index.tsx
index edf41823..ae729f36 100644
--- a/src/routes/load/components/ReviewInformation/index.tsx
+++ b/src/routes/load/components/ReviewInformation/index.tsx
@@ -17,8 +17,9 @@ import { getAccountsFrom } from 'src/routes/open/utils/safeDataExtractor'
 import { useStyles } from './styles'
 import { getExplorerInfo } from 'src/config'
 import { ExplorerButton } from '@gnosis.pm/safe-react-components'
+import { LoadFormValues } from 'src/routes/load/container/Load'
 
-const checkIfUserAddressIsAnOwner = (values: Record<string, string>, userAddress: string): boolean => {
+const checkIfUserAddressIsAnOwner = (values: LoadFormValues, userAddress: string): boolean => {
   let isOwner = false
 
   for (let i = 0; i < getNumOwnersFrom(values); i += 1) {
@@ -33,7 +34,7 @@ const checkIfUserAddressIsAnOwner = (values: Record<string, string>, userAddress
 
 interface Props {
   userAddress: string
-  values: Record<string, string>
+  values: LoadFormValues
 }
 
 const ReviewComponent = ({ userAddress, values }: Props): React.ReactElement => {
@@ -138,7 +139,7 @@ const ReviewComponent = ({ userAddress, values }: Props): React.ReactElement =>
 }
 
 const Review = ({ userAddress }: { userAddress: string }) =>
-  function ReviewPage(controls: React.ReactNode, { values }: { values: Record<string, string> }): React.ReactElement {
+  function ReviewPage(controls: React.ReactNode, { values }: { values: LoadFormValues }): React.ReactElement {
     return (
       <>
         <OpenPaper controls={controls} padding={false}>
diff --git a/src/routes/load/container/Load.tsx b/src/routes/load/container/Load.tsx
index 6e4b5305..1557ba3a 100644
--- a/src/routes/load/container/Load.tsx
+++ b/src/routes/load/container/Load.tsx
@@ -35,12 +35,24 @@ export const loadSafe = async (
   await addSafe(safeProps)
 }
 
-export interface LoadFormValues {
+interface ReviewSafeCreationValues {
+  confirmations: string
+  name: string
+  owner0Address: string
+  owner0Name: string
+  safeCreationSalt: number
+}
+
+interface LoadForm {
   name: string
   address: string
   threshold: string
+  owner0Address: string
+  owner0Name: string
 }
 
+export type LoadFormValues = ReviewSafeCreationValues | LoadForm
+
 const Load = (): React.ReactElement => {
   const dispatch = useDispatch()
   const provider = useSelector(providerNameSelector)
diff --git a/src/routes/open/components/Layout.tsx b/src/routes/open/components/Layout.tsx
index 9620c05b..e7e1689d 100644
--- a/src/routes/open/components/Layout.tsx
+++ b/src/routes/open/components/Layout.tsx
@@ -20,7 +20,7 @@ import {
 import { WelcomeLayout } from 'src/routes/welcome/components/index'
 import { history } from 'src/store'
 import { secondary, sm } from 'src/theme/variables'
-import { networkSelector, providerNameSelector, userAccountSelector } from 'src/logic/wallets/store/selectors'
+import { providerNameSelector, userAccountSelector } from 'src/logic/wallets/store/selectors'
 import { useSelector } from 'react-redux'
 import { addressBookSelector } from 'src/logic/addressBook/store/selectors'
 import { getNameFromAddressBook } from 'src/logic/addressBook/utils'
@@ -94,7 +94,6 @@ export const Layout = (props: LayoutProps): React.ReactElement => {
   const { onCallSafeContractSubmit, safeProps } = props
 
   const provider = useSelector(providerNameSelector)
-  const network = useSelector(networkSelector)
   const userAccount = useSelector(userAccountSelector)
 
   useEffect(() => {
@@ -107,33 +106,31 @@ export const Layout = (props: LayoutProps): React.ReactElement => {
 
   const initialValues = useInitialValuesFrom(userAccount, safeProps)
 
+  if (!provider) {
+    return <WelcomeLayout isOldMultisigMigration />
+  }
+
   return (
-    <>
-      {provider ? (
-        <Block>
-          <Row align="center">
-            <IconButton disableRipple onClick={back} style={iconStyle}>
-              <ChevronLeft />
-            </IconButton>
-            <Heading tag="h2" testId="create-safe-form-title">
-              Create New Safe
-            </Heading>
-          </Row>
-          <Stepper
-            initialValues={initialValues}
-            mutators={formMutators}
-            onSubmit={onCallSafeContractSubmit}
-            steps={steps}
-            testId="create-safe-form"
-          >
-            <StepperPage component={SafeNameField} />
-            <StepperPage component={SafeOwnersPage} validate={validateOwnersForm} />
-            <StepperPage network={network} userAccount={userAccount} component={Review} />
-          </Stepper>
-        </Block>
-      ) : (
-        <WelcomeLayout isOldMultisigMigration />
-      )}
-    </>
+    <Block>
+      <Row align="center">
+        <IconButton disableRipple onClick={back} style={iconStyle}>
+          <ChevronLeft />
+        </IconButton>
+        <Heading tag="h2" testId="create-safe-form-title">
+          Create New Safe
+        </Heading>
+      </Row>
+      <Stepper
+        initialValues={initialValues}
+        mutators={formMutators}
+        onSubmit={onCallSafeContractSubmit}
+        steps={steps}
+        testId="create-safe-form"
+      >
+        <StepperPage component={SafeNameField} />
+        <StepperPage component={SafeOwnersPage} validate={validateOwnersForm} />
+        <StepperPage component={Review} />
+      </Stepper>
+    </Block>
   )
 }
diff --git a/src/routes/open/components/ReviewInformation/index.tsx b/src/routes/open/components/ReviewInformation/index.tsx
index 4f08ff61..8e899bee 100644
--- a/src/routes/open/components/ReviewInformation/index.tsx
+++ b/src/routes/open/components/ReviewInformation/index.tsx
@@ -1,7 +1,6 @@
 import TableContainer from '@material-ui/core/TableContainer'
 import classNames from 'classnames'
-import React, { useEffect, useState } from 'react'
-import { fromTokenUnit } from 'src/logic/tokens/utils/humanReadableValue'
+import React, { ReactElement, useEffect, useMemo } from 'react'
 import { getExplorerInfo, getNetworkInfo } from 'src/config'
 import CopyBtn from 'src/components/CopyBtn'
 import Identicon from 'src/components/Identicon'
@@ -11,45 +10,41 @@ import Hairline from 'src/components/layout/Hairline'
 import Paragraph from 'src/components/layout/Paragraph'
 import Row from 'src/components/layout/Row'
 import OpenPaper from 'src/components/Stepper/OpenPaper'
-import { estimateGasForDeployingSafe } from 'src/logic/contracts/safeContracts'
-import { formatAmount } from 'src/logic/tokens/utils/formatAmount'
-import { getAccountsFrom, getNamesFrom, getSafeCreationSaltFrom } from 'src/routes/open/utils/safeDataExtractor'
+import {
+  CreateSafeValues,
+  getAccountsFrom,
+  getNamesFrom,
+  getSafeCreationSaltFrom,
+} from 'src/routes/open/utils/safeDataExtractor'
 
 import { FIELD_CONFIRMATIONS, FIELD_NAME, getNumOwnersFrom } from '../fields'
 import { useStyles } from './styles'
 import { ExplorerButton } from '@gnosis.pm/safe-react-components'
+import { useEstimateSafeCreationGas } from 'src/logic/hooks/useEstimateSafeCreationGas'
+import { FormApi } from 'final-form'
+import { StepperPageFormProps } from 'src/components/Stepper'
+import { LoadFormValues } from 'src/routes/load/container/Load'
 
 type ReviewComponentProps = {
-  userAccount: string
-  values: any
+  values: LoadFormValues
+  form: FormApi
 }
 
 const { nativeCoin } = getNetworkInfo()
 
-const ReviewComponent = ({ userAccount, values }: ReviewComponentProps) => {
+const ReviewComponent = ({ values, form }: ReviewComponentProps): ReactElement => {
   const classes = useStyles()
 
-  const [gasCosts, setGasCosts] = useState('< 0.001')
   const names = getNamesFrom(values)
-  const addresses = getAccountsFrom(values)
+  const addresses = useMemo(() => getAccountsFrom(values), [values])
+
   const numOwners = getNumOwnersFrom(values)
-  const safeCreationSalt = getSafeCreationSaltFrom(values)
+  const safeCreationSalt = getSafeCreationSaltFrom(values as CreateSafeValues)
+  const { gasCostFormatted, gasLimit } = useEstimateSafeCreationGas({ addresses, numOwners, safeCreationSalt })
 
   useEffect(() => {
-    const estimateGas = async () => {
-      if (!addresses.length || !numOwners || !userAccount) {
-        return
-      }
-      const estimatedGasCosts = (
-        await estimateGasForDeployingSafe(addresses, numOwners, userAccount, safeCreationSalt)
-      ).toString()
-      const gasCosts = fromTokenUnit(estimatedGasCosts, nativeCoin.decimals)
-      const formattedGasCosts = formatAmount(gasCosts)
-      setGasCosts(formattedGasCosts)
-    }
-
-    estimateGas()
-  }, [addresses, numOwners, safeCreationSalt, userAccount])
+    form.mutators.setValue('gasLimit', gasLimit)
+  }, [gasLimit, form.mutators])
 
   return (
     <>
@@ -135,8 +130,8 @@ const ReviewComponent = ({ userAccount, values }: ReviewComponentProps) => {
       <Row align="center" className={classes.info}>
         <Paragraph color="primary" noMargin size="md">
           You&apos;re about to create a new Safe and will have to confirm a transaction with your currently connected
-          wallet. The creation will cost approximately {gasCosts} {nativeCoin.name}. The exact amount will be determined
-          by your wallet.
+          wallet. The creation will cost approximately {gasCostFormatted} {nativeCoin.name}. The exact amount will be
+          determined by your wallet.
         </Paragraph>
       </Row>
     </>
@@ -144,7 +139,7 @@ const ReviewComponent = ({ userAccount, values }: ReviewComponentProps) => {
 }
 
 export const Review = () =>
-  function ReviewPage(controls, props): React.ReactElement {
+  function ReviewPage(controls: React.ReactNode, props: StepperPageFormProps): React.ReactElement {
     return (
       <>
         <OpenPaper controls={controls} padding={false}>
diff --git a/src/routes/open/components/fields.ts b/src/routes/open/components/fields.ts
index 4df7b36e..87d0f0b7 100644
--- a/src/routes/open/components/fields.ts
+++ b/src/routes/open/components/fields.ts
@@ -4,13 +4,17 @@ export const FIELD_OWNERS = 'owners'
 export const FIELD_SAFE_NAME = 'safeName'
 export const FIELD_CREATION_PROXY_SALT = 'safeCreationSalt'
 
-export const getOwnerNameBy = (index) => `owner${index}Name`
-export const getOwnerAddressBy = (index) => `owner${index}Address`
+export const getOwnerNameBy = (index: number): string => `owner${index}Name`
+export const getOwnerAddressBy = (index: number): string => `owner${index}Address`
 
 export const getNumOwnersFrom = (values) => {
   const accounts = Object.keys(values)
     .sort()
-    .filter((key) => /^owner\d+Address$/.test(key) && !!values[key])
+    .filter((key) => {
+      const res = /^owner\d+Address$/.test(key)
+
+      return res && !!values[key]
+    })
 
   return accounts.length
 }
diff --git a/src/routes/open/container/Open.tsx b/src/routes/open/container/Open.tsx
index 9744f4f3..51136910 100644
--- a/src/routes/open/container/Open.tsx
+++ b/src/routes/open/container/Open.tsx
@@ -6,11 +6,12 @@ import { useLocation } from 'react-router-dom'
 import { PromiEvent, TransactionReceipt } from 'web3-core'
 
 import { SafeDeployment } from 'src/routes/opening'
-import { InitialValuesForm, Layout } from 'src/routes/open/components/Layout'
+import { Layout } from 'src/routes/open/components/Layout'
 import Page from 'src/components/layout/Page'
 import { getSafeDeploymentTransaction } from 'src/logic/contracts/safeContracts'
 import { checkReceiptStatus } from 'src/logic/wallets/ethTransactions'
 import {
+  CreateSafeValues,
   getAccountsFrom,
   getNamesFrom,
   getOwnersFrom,
@@ -29,6 +30,8 @@ import { useAnalytics } from 'src/utils/googleAnalytics'
 
 const SAFE_PENDING_CREATION_STORAGE_KEY = 'SAFE_PENDING_CREATION_STORAGE_KEY'
 
+type LoadedSafeType = CreateSafeValues & { txHash: string }
+
 interface SafeCreationQueryParams {
   ownerAddresses: string | string[] | null
   ownerNames: string | string[] | null
@@ -85,7 +88,7 @@ export const getSafeProps = async (
   return safeProps
 }
 
-export const createSafe = (values: InitialValuesForm, userAccount: string): PromiEvent<TransactionReceipt> => {
+export const createSafe = (values: CreateSafeValues, userAccount: string): PromiEvent<TransactionReceipt> => {
   const confirmations = getThresholdFrom(values)
   const name = getSafeNameFrom(values)
   const ownersNames = getNamesFrom(values)
@@ -93,7 +96,10 @@ export const createSafe = (values: InitialValuesForm, userAccount: string): Prom
   const safeCreationSalt = getSafeCreationSaltFrom(values)
 
   const deploymentTx = getSafeDeploymentTransaction(ownerAddresses, confirmations, safeCreationSalt)
-  const promiEvent = deploymentTx.send({ from: userAccount })
+  const promiEvent = deploymentTx.send({
+    from: userAccount,
+    gas: values?.gasLimit,
+  })
 
   promiEvent
     .once('transactionHash', (txHash) => {
@@ -155,28 +161,28 @@ const Open = (): React.ReactElement => {
     load()
   }, [])
 
-  const createSafeProxy = async (formValues?: InitialValuesForm) => {
+  const createSafeProxy = async (formValues?: CreateSafeValues) => {
     let values = formValues
 
     // save form values, used when the user rejects the TX and wants to retry
-    if (formValues) {
-      const copy = { ...formValues }
+    if (values) {
+      const copy = { ...values }
       saveToStorage(SAFE_PENDING_CREATION_STORAGE_KEY, copy)
     } else {
-      values = await loadFromStorage(SAFE_PENDING_CREATION_STORAGE_KEY)
+      values = (await loadFromStorage(SAFE_PENDING_CREATION_STORAGE_KEY)) as CreateSafeValues
     }
 
-    const promiEvent = createSafe(values as InitialValuesForm, userAccount)
+    const promiEvent = createSafe(values, userAccount)
     setCreationTxPromise(promiEvent)
     setShowProgress(true)
   }
 
   const onSafeCreated = async (safeAddress): Promise<void> => {
-    const pendingCreation = await loadFromStorage<{ txHash: string }>(SAFE_PENDING_CREATION_STORAGE_KEY)
+    const pendingCreation = await loadFromStorage<LoadedSafeType>(SAFE_PENDING_CREATION_STORAGE_KEY)
 
-    const name = getSafeNameFrom(pendingCreation)
-    const ownersNames = getNamesFrom(pendingCreation)
-    const ownerAddresses = getAccountsFrom(pendingCreation)
+    const name = pendingCreation ? getSafeNameFrom(pendingCreation) : ''
+    const ownersNames = getNamesFrom(pendingCreation as CreateSafeValues)
+    const ownerAddresses = pendingCreation ? getAccountsFrom(pendingCreation) : []
     const safeProps = await getSafeProps(safeAddress, name, ownersNames, ownerAddresses)
 
     await dispatch(addOrUpdateSafe(safeProps))
diff --git a/src/routes/open/utils/safeDataExtractor.spec.ts b/src/routes/open/utils/safeDataExtractor.spec.ts
index ff1946b3..a4add102 100644
--- a/src/routes/open/utils/safeDataExtractor.spec.ts
+++ b/src/routes/open/utils/safeDataExtractor.spec.ts
@@ -8,6 +8,9 @@ describe('Test JS', () => {
       owner1Address: 'bar',
       owner2Address: 'baz',
       owners: 3,
+      confirmations: '0',
+      name: '',
+      safeCreationSalt: 0,
     }
 
     expect(getAccountsFrom(safe)).toEqual(['foo', 'bar', 'baz'])
@@ -15,9 +18,15 @@ describe('Test JS', () => {
   it('return the names of owners', () => {
     const safe = {
       owner0Name: 'foo',
+      owner0Address: '0x',
       owner1Name: 'bar',
+      owner1Address: '0x',
       owner2Name: 'baz',
+      owner2Address: '0x',
       owners: 3,
+      confirmations: '0',
+      name: '',
+      safeCreationSalt: 0,
     }
 
     expect(getNamesFrom(safe)).toEqual(['foo', 'bar', 'baz'])
@@ -31,12 +40,15 @@ describe('Test JS', () => {
       owner2Name: 'bazName',
       owner2Address: 'bazAddress',
       owners: 1,
+      confirmations: '0',
+      name: '',
+      safeCreationSalt: 0,
     }
 
-    expect(getNamesFrom(safe)).toEqual(['fooName'])
-    expect(getAccountsFrom(safe)).toEqual(['fooAddress'])
+    expect(getNamesFrom(safe)).toEqual(['fooName', 'barName', 'bazName'])
+    expect(getAccountsFrom(safe)).toEqual(['fooAddress', 'barAddress', 'bazAddress'])
   })
-  it('return name and address ordered alphabetically', () => {
+  it('return name and address keys ordered alphabetically', () => {
     const safe = {
       owner1Name: 'barName',
       owner1Address: 'barAddress',
@@ -45,14 +57,19 @@ describe('Test JS', () => {
       owner2Address: 'bazAddress',
       owner0Address: 'fooAddress',
       owners: 1,
+      confirmations: '0',
+      name: '',
+      safeCreationSalt: 0,
     }
 
-    expect(getNamesFrom(safe)).toEqual(['fooName'])
-    expect(getAccountsFrom(safe)).toEqual(['fooAddress'])
+    expect(getNamesFrom(safe)).toEqual(['fooName', 'barName', 'bazName'])
+    expect(getAccountsFrom(safe)).toEqual(['fooAddress', 'barAddress', 'bazAddress'])
   })
   it('return the number of required confirmations', () => {
     const safe = {
       confirmations: '1',
+      name: '',
+      safeCreationSalt: 0,
     }
 
     expect(getThresholdFrom(safe)).toEqual(1)
diff --git a/src/routes/open/utils/safeDataExtractor.ts b/src/routes/open/utils/safeDataExtractor.ts
index fd380228..e44452c8 100644
--- a/src/routes/open/utils/safeDataExtractor.ts
+++ b/src/routes/open/utils/safeDataExtractor.ts
@@ -2,31 +2,45 @@ import { List } from 'immutable'
 
 import { makeOwner } from 'src/logic/safe/store/models/owner'
 import { SafeOwner } from 'src/logic/safe/store/models/safe'
+import { LoadFormValues } from 'src/routes/load/container/Load'
+import { getNumOwnersFrom } from 'src/routes/open/components/fields'
 
-export const getAccountsFrom = (values) => {
+export type CreateSafeValues = {
+  confirmations: string
+  name: string
+  owner0Address?: string
+  owner0Name?: string
+  safeCreationSalt: number
+  gasLimit?: number
+  owners?: number | string
+}
+
+export const getAccountsFrom = (values: CreateSafeValues | LoadFormValues): string[] => {
   const accounts = Object.keys(values)
     .sort()
     .filter((key) => /^owner\d+Address$/.test(key))
 
-  return accounts.map((account) => values[account]).slice(0, values.owners)
+  const numOwners = getNumOwnersFrom(values)
+  return accounts.map((account) => values[account]).slice(0, numOwners)
 }
 
-export const getNamesFrom = (values) => {
+export const getNamesFrom = (values: CreateSafeValues | LoadFormValues): string[] => {
   const accounts = Object.keys(values)
     .sort()
     .filter((key) => /^owner\d+Name$/.test(key))
 
-  return accounts.map((account) => values[account]).slice(0, values.owners)
+  const numOwners = getNumOwnersFrom(values)
+  return accounts.map((account) => values[account]).slice(0, numOwners)
 }
 
-export const getOwnersFrom = (names, addresses): List<SafeOwner> => {
+export const getOwnersFrom = (names: string[], addresses: string[]): List<SafeOwner> => {
   const owners = names.map((name, index) => makeOwner({ name, address: addresses[index] }))
 
   return List(owners)
 }
 
-export const getThresholdFrom = (values) => Number(values.confirmations)
+export const getThresholdFrom = (values: CreateSafeValues): number => Number(values.confirmations)
 
-export const getSafeNameFrom = (values) => values.name
+export const getSafeNameFrom = (values: CreateSafeValues): string => values.name
 
-export const getSafeCreationSaltFrom = (values) => values.safeCreationSalt
+export const getSafeCreationSaltFrom = (values: CreateSafeValues): number => values.safeCreationSalt