diff --git a/packages/nextjs/app/admin/_components/GrantReview.tsx b/packages/nextjs/app/admin/_components/GrantReview.tsx
index da31696..b46ddbf 100644
--- a/packages/nextjs/app/admin/_components/GrantReview.tsx
+++ b/packages/nextjs/app/admin/_components/GrantReview.tsx
@@ -101,6 +101,11 @@ export const GrantReview = ({ grant }: { grant: GrantDataWithBuilder }) => {
       <h3 className="font-bold">
         {grant.title}
         <span className="text-sm text-gray-500 ml-2">({grant.id})</span>
+        {grant.link && (
+          <a href={grant.link} className="ml-4 underline" target="_blank" rel="noopener noreferrer">
+            View Build
+          </a>
+        )}
       </h3>
       <div className="flex gap-4 items-center">
         <Address address={grant.builder} link={`https://app.buidlguidl.com/builders/${grant.builder}`} />
diff --git a/packages/nextjs/app/api/grants/submit/route.ts b/packages/nextjs/app/api/grants/submit/route.ts
new file mode 100644
index 0000000..fff3fce
--- /dev/null
+++ b/packages/nextjs/app/api/grants/submit/route.ts
@@ -0,0 +1,57 @@
+import { NextResponse } from "next/server";
+import { recoverTypedDataAddress } from "viem";
+import { getGrantById, submitGrantBuild } from "~~/services/database/grants";
+import { EIP_712_DOMAIN, EIP_712_TYPES__SUBMIT_GRANT } from "~~/utils/eip712";
+import { PROPOSAL_STATUS } from "~~/utils/grants";
+
+type ReqBody = {
+  grantId?: string;
+  signer?: string;
+  link?: string;
+  signature?: `0x${string}`;
+};
+
+export async function POST(req: Request) {
+  try {
+    const { grantId, link, signer, signature } = (await req.json()) as ReqBody;
+    if (!grantId || !signer || !link || !signature) {
+      return NextResponse.json({ error: "Invalid form details submitted" }, { status: 400 });
+    }
+
+    // Validate Signature
+    const recoveredAddress = await recoverTypedDataAddress({
+      domain: EIP_712_DOMAIN,
+      types: EIP_712_TYPES__SUBMIT_GRANT,
+      primaryType: "Message",
+      message: {
+        grantId: grantId,
+        action: "submit",
+        link,
+      },
+      signature,
+    });
+    if (recoveredAddress !== signer) {
+      console.error("Signature error", recoveredAddress, signer);
+      return NextResponse.json({ error: "Unauthorized" }, { status: 401 });
+    }
+
+    // Validate if the grant is approved and owned by the builder
+    const grant = await getGrantById(grantId);
+    if (!grant) {
+      return NextResponse.json({ error: "Invalid grant" }, { status: 400 });
+    }
+    if (grant.builder !== signer) {
+      return NextResponse.json({ error: "Builder does not own this grant" }, { status: 401 });
+    }
+    if (grant.status !== PROPOSAL_STATUS.APPROVED) {
+      return NextResponse.json({ error: "Grant is not approved" }, { status: 400 });
+    }
+
+    await submitGrantBuild(grantId, link);
+
+    return NextResponse.json({}, { status: 201 });
+  } catch (e) {
+    console.error(e);
+    return NextResponse.json({ error: "Error processing form" }, { status: 500 });
+  }
+}
diff --git a/packages/nextjs/app/my-grants/_components/SubmitModal.tsx b/packages/nextjs/app/my-grants/_components/SubmitModal.tsx
new file mode 100644
index 0000000..1c1f522
--- /dev/null
+++ b/packages/nextjs/app/my-grants/_components/SubmitModal.tsx
@@ -0,0 +1,119 @@
+import { useState } from "react";
+import { mutate } from "swr";
+import useSWRMutation from "swr/mutation";
+import { useAccount, useSignTypedData } from "wagmi";
+import { InformationCircleIcon } from "@heroicons/react/24/outline";
+import { GrantData } from "~~/services/database/schema";
+import { EIP_712_DOMAIN, EIP_712_TYPES__SUBMIT_GRANT } from "~~/utils/eip712";
+import { notification } from "~~/utils/scaffold-eth";
+import { postMutationFetcher } from "~~/utils/swr";
+
+type ReqBody = {
+  grantId?: string;
+  status?: string;
+  signer?: string;
+  link?: string;
+  signature?: `0x${string}`;
+};
+
+export const SubmitModal = ({ grant, closeModal }: { grant: GrantData; closeModal: () => void }) => {
+  const { address: connectedAddress } = useAccount();
+  const [buildUrl, setBuildUrl] = useState("");
+  const { trigger: submitBuildLink, isMutating: isSubmittingLink } = useSWRMutation(
+    "/api/grants/submit",
+    postMutationFetcher<ReqBody>,
+  );
+
+  const { signTypedDataAsync, isLoading: isSigningMessage } = useSignTypedData();
+
+  const handleSubmit = async () => {
+    const urlPattern = new RegExp("^(https://app\\.buidlguidl\\.com/build/)[a-z0-9-]+$");
+
+    if (!urlPattern.test(buildUrl.toLowerCase()))
+      return notification.error("You must submit a valid build URL (https://app.buidlguidl.com/build/...)");
+
+    let signature;
+    try {
+      signature = await signTypedDataAsync({
+        domain: EIP_712_DOMAIN,
+        types: EIP_712_TYPES__SUBMIT_GRANT,
+        primaryType: "Message",
+        message: {
+          grantId: grant.id,
+          action: "submit",
+          link: buildUrl,
+        },
+      });
+    } catch (error) {
+      console.error("Error signing message", error);
+      notification.error("Error signing message");
+      return;
+    }
+
+    let notificationId;
+    try {
+      notificationId = notification.loading("Submitting build URL");
+      await submitBuildLink({ grantId: grant.id, link: buildUrl, signer: connectedAddress, signature });
+      await mutate(`/api/builders/${connectedAddress}/grants`);
+      closeModal();
+      notification.remove(notificationId);
+      notification.success("Build URL submitted successfully");
+    } catch (error) {
+      notification.error("Error submitting build URL");
+    } finally {
+      if (notificationId) notification.remove(notificationId);
+    }
+  };
+
+  return (
+    <div
+      className="fixed inset-0 bg-black bg-opacity-50 flex justify-center items-center p-8 md:p-0 z-10"
+      onClick={closeModal}
+    >
+      <div className="rounded-2xl bg-primary p-5 w-auto md:w-1/2 lg:w-1/3 xl:w-1/4" onClick={e => e.stopPropagation()}>
+        <button onClick={closeModal} className="float-right text-xs hover:underline">
+          Close
+        </button>
+        <h2 className="font-medium text-lg pb-2">{grant.title}</h2>
+        <div role="alert" className="alert border-0">
+          <span className="text-sm text-gray-400">
+            <InformationCircleIcon
+              fill="none"
+              viewBox="0 0 24 24"
+              strokeWidth="2"
+              className="stroke-info shrink-0 w-5 h-5 inline-block mr-2"
+            />
+            First you&apos;ll need to register the build in your&nbsp;
+            <a
+              href={`https://app.buidlguidl.com/builders/${connectedAddress}`}
+              target="_blank"
+              rel="noopener noreferrer"
+              className="text-black-500 underline"
+            >
+              BuidlGuidl profile
+            </a>
+            &nbsp;and then submit the URL of your BG build in this form. BG Grants team will review it to complete the
+            grant.
+          </span>
+        </div>
+        <label className="block mt-4">
+          <span className="font-medium">Build URL</span> to be reviewed and complete grant:
+        </label>
+        <input
+          type="text"
+          value={buildUrl}
+          onChange={e => setBuildUrl(e.target.value)}
+          placeholder="https://app.buidlguidl.com/build/..."
+          className="placeholder: pl-[14px] mt-4 w-full p-1 rounded-lg"
+        />
+        <button
+          className="mt-8 btn btn-sm btn-secondary"
+          disabled={isSigningMessage || isSubmittingLink}
+          onClick={handleSubmit}
+        >
+          Submit
+        </button>
+      </div>
+    </div>
+  );
+};
diff --git a/packages/nextjs/app/my-grants/page.tsx b/packages/nextjs/app/my-grants/page.tsx
index ddc3e8c..5d65176 100644
--- a/packages/nextjs/app/my-grants/page.tsx
+++ b/packages/nextjs/app/my-grants/page.tsx
@@ -1,5 +1,7 @@
 "use client";
 
+import { useState } from "react";
+import { SubmitModal } from "./_components/SubmitModal";
 import { NextPage } from "next";
 import useSWR from "swr";
 import { useAccount } from "wagmi";
@@ -14,11 +16,18 @@ const badgeBgColor = {
   [PROPOSAL_STATUS.REJECTED]: "bg-error",
 };
 
-// ToDo. Action (v1.0 = submit grant after completion)
 const MyGrants: NextPage = () => {
   const { address } = useAccount();
   const { data: builderGrants, isLoading } = useSWR<GrantData[]>(address ? `/api/builders/${address}/grants` : null);
 
+  const [modalIsOpen, setModalIsOpen] = useState(false);
+  const [currentGrant, setCurrentGrant] = useState<GrantData | null>(null);
+
+  const openModal = (grant: GrantData) => {
+    setCurrentGrant(grant);
+    setModalIsOpen(true);
+  };
+
   return (
     <div className="container mx-auto max-w-screen-md mt-12">
       <h1 className="text-4xl font-bold">My grants</h1>
@@ -32,8 +41,17 @@ const MyGrants: NextPage = () => {
           </h3>
           <p>{grant.description}</p>
           <p className={`badge ${badgeBgColor[grant.status]}`}>{grant.status}</p>
+          {grant.status === PROPOSAL_STATUS.APPROVED && (
+            <button onClick={() => openModal(grant)} className="btn btn-primary float-right">
+              Submit build
+            </button>
+          )}
         </div>
       ))}
+
+      {modalIsOpen && currentGrant !== null && (
+        <SubmitModal grant={currentGrant} closeModal={() => setModalIsOpen(false)} />
+      )}
     </div>
   );
 };
diff --git a/packages/nextjs/services/database/grants.ts b/packages/nextjs/services/database/grants.ts
index 7950453..73dacfa 100644
--- a/packages/nextjs/services/database/grants.ts
+++ b/packages/nextjs/services/database/grants.ts
@@ -5,8 +5,8 @@ import { PROPOSAL_STATUS, ProposalStatusType } from "~~/utils/grants";
 
 const firestoreDB = getFirestoreConnector();
 const grantsCollection = firestoreDB.collection("grants");
-// const getGrantsDoc = (id: string) => grantsCollection.doc(id);
-// const getGrantSnapshotById = (id: string) => getGrantsDoc(id).get();
+const getGrantsDoc = (id: string) => grantsCollection.doc(id);
+const getGrantSnapshotById = (id: string) => getGrantsDoc(id).get();
 
 export const createGrant = async (grantData: Omit<GrantData, "id" | "proposedAt" | "status">) => {
   try {
@@ -148,3 +148,29 @@ export const getGrantsStats = async () => {
     throw error;
   }
 };
+
+export const getGrantById = async (grantId: string) => {
+  try {
+    const grantSnapshot = await getGrantSnapshotById(grantId);
+    if (!grantSnapshot.exists) {
+      return null;
+    }
+    return { id: grantSnapshot.id, ...grantSnapshot.data() } as GrantData;
+  } catch (error) {
+    console.error("Error getting grant by id:", error);
+    throw error;
+  }
+};
+
+export const submitGrantBuild = async (grantId: string, link: string) => {
+  const status = PROPOSAL_STATUS.SUBMITTED;
+  const grantActionTimeStamp = new Date().getTime();
+  const grantActionTimeStampKey = (status + "At") as `${typeof status}At`;
+
+  try {
+    await getGrantsDoc(grantId).update({ status, link, [grantActionTimeStampKey]: grantActionTimeStamp });
+  } catch (error) {
+    console.error("Error updating the grant status:", error);
+    throw error;
+  }
+};
diff --git a/packages/nextjs/utils/eip712.ts b/packages/nextjs/utils/eip712.ts
index fdc67ab..319ecee 100644
--- a/packages/nextjs/utils/eip712.ts
+++ b/packages/nextjs/utils/eip712.ts
@@ -19,3 +19,11 @@ export const EIP_712_TYPES__REVIEW_GRANT = {
     { name: "action", type: "string" },
   ],
 } as const;
+
+export const EIP_712_TYPES__SUBMIT_GRANT = {
+  Message: [
+    { name: "grantId", type: "string" },
+    { name: "action", type: "string" },
+    { name: "link", type: "string" },
+  ],
+} as const;