diff --git a/c/cmake_modules/AdbcDefines.cmake b/c/cmake_modules/AdbcDefines.cmake
index 2cf5e2ffa4..c0bf38a41c 100644
--- a/c/cmake_modules/AdbcDefines.cmake
+++ b/c/cmake_modules/AdbcDefines.cmake
@@ -77,6 +77,11 @@ if(MSVC)
   # Allow incomplete switch (since MSVC warns even if there's a default case)
   add_compile_options(/wd4061)
   add_compile_options(/wd4100)
+  # Nanoarrow emits a lot of conversion warnings
+  add_compile_options(/wd4365)
+  add_compile_options(/wd4458)
+  add_compile_options(/wd4514)
+  add_compile_options(/wd4582)
   add_compile_options(/wd4623)
   add_compile_options(/wd4625)
   add_compile_options(/wd4626)
@@ -85,6 +90,7 @@ if(MSVC)
   add_compile_options(/wd4711)
   # Don't warn about padding added after members
   add_compile_options(/wd4820)
+  add_compile_options(/wd5027)
   add_compile_options(/wd5045)
 elseif(CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang"
        OR CMAKE_CXX_COMPILER_ID STREQUAL "Clang"
diff --git a/c/driver/framework/base.cc b/c/driver/framework/base.cc
index ab94caf370..2e93b8f61c 100644
--- a/c/driver/framework/base.cc
+++ b/c/driver/framework/base.cc
@@ -147,7 +147,7 @@ AdbcStatusCode Option::CGet(double* out, AdbcError* error) const {
       [&](auto&& value) -> AdbcStatusCode {
         using T = std::decay_t<decltype(value)>;
         if constexpr (std::is_same_v<T, double> || std::is_same_v<T, int64_t>) {
-          *out = value;
+          *out = static_cast<double>(value);
           return ADBC_STATUS_OK;
         } else if constexpr (std::is_same_v<T, Unset>) {
           return status::NotFound("Unknown option").ToAdbc(error);
diff --git a/c/driver/framework/objects.cc b/c/driver/framework/objects.cc
index 28e33c0c16..67f5b26f01 100644
--- a/c/driver/framework/objects.cc
+++ b/c/driver/framework/objects.cc
@@ -69,7 +69,7 @@ struct GetObjectsBuilder {
         table_types(table_types),
         schema(schema),
         array(array) {
-    na_error = {0};
+    std::memset(&na_error, 0, sizeof(na_error));
   }
 
   Status Build() {