diff --git a/.circleci/build_win.ps1 b/.circleci/build_win.ps1
new file mode 100644
index 000000000..a3d0abc00
--- /dev/null
+++ b/.circleci/build_win.ps1
@@ -0,0 +1,7 @@
+cd "$PSScriptRoot\.."
+mkdir build
+cd build
+$boost_dir=(Resolve-Path $PSScriptRoot\..\deps\boost\lib\cmake\Boost-*)
+..\deps\cmake\bin\cmake -G "Visual Studio 16 2019" -DBoost_DIR="$boost_dir\" -DCMAKE_MSVC_RUNTIME_LIBRARY=MultiThreaded -DCMAKE_INSTALL_PREFIX="$PSScriptRoot\..\upload" ..
+msbuild solidity.sln /p:Configuration=Release /m:5 /v:minimal
+..\deps\cmake\bin\cmake --build . -j 5 --target install --config Release
diff --git a/.circleci/config.yml b/.circleci/config.yml
index 0cf54d7e1..651bd55d7 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -27,6 +27,9 @@ parameters:
     type: string
     default: "solbuildpackpusher/solidity-buildpack-deps@sha256:23dad3b34deae8107c8551804ef299f6a89c23ed506e8118fac151e2bdc9018c"
 
+orbs:
+  win: circleci/windows@2.2.0
+
 defaults:
 
   # --------------------------------------------------------------------------
@@ -64,6 +67,10 @@ defaults:
       path: build/solc/solc
       destination: solc
 
+  # windows artifacts
+  - artifact_solc_windows: &artifact_solc_windows
+      path: upload/
+
   # compiled tool executable target
   - artifacts_tools: &artifacts_tools
       path: build/tools/solidity-upgrade
@@ -876,6 +883,29 @@ jobs:
       - run: *gitter_notify_failure
       - run: *gitter_notify_success
 
+  b_win:
+    executor:
+      name: win/default
+      shell: powershell.exe
+    steps:
+      - checkout
+      - restore_cache:
+          keys:
+            - dependencies-win-{{ checksum "scripts/install_deps.ps1" }}
+      - run:
+          name: "Installing dependencies"
+          command: if ( -not (Test-Path .\deps\boost) ) { .\scripts\install_deps.ps1 }
+      - save_cache:
+          key: dependencies-win-{{ checksum "scripts/install_deps.ps1" }}
+          paths:
+            - .\deps\boost
+            - .\deps\cmake
+      - run:
+          name: "Building solidity"
+          command: .circleci/build_win.ps1
+      - store_artifacts: *artifact_solc_windows
+      - persist_to_workspace: *artifacts_build_dir
+
 workflows:
   version: 2
 
@@ -927,6 +957,9 @@ workflows:
       - t_ems_compile_ext_gnosis: *workflow_emscripten
       - t_ems_compile_ext_zeppelin: *workflow_emscripten
 
+      # Windows build and tests
+      - b_win: *workflow_trigger_on_tags
+
   nightly:
 
     triggers:
diff --git a/appveyor.yml b/appveyor.yml
index d7211e14b..15ad9b57b 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -59,7 +59,7 @@ install:
 before_build:
     - if not exist build mkdir build
     - cd build
-    - cmake -G "Visual Studio 15 2017 Win64" .. -DTESTS=On
+    - cmake -G "Visual Studio 15 2017 Win64" .. -DTESTS=On -DBoost_USE_STATIC_RUNTIME=OFF
 build_script:
     - msbuild solidity.sln /p:Configuration=%CONFIGURATION% /m:%NUMBER_OF_PROCESSORS% /v:minimal
     - cd %APPVEYOR_BUILD_FOLDER%
diff --git a/cmake/EthDependencies.cmake b/cmake/EthDependencies.cmake
index d8bca8a31..04cb876be 100644
--- a/cmake/EthDependencies.cmake
+++ b/cmake/EthDependencies.cmake
@@ -25,6 +25,9 @@ set(ETH_SCRIPTS_DIR ${ETH_CMAKE_DIR}/scripts)
 ## use multithreaded boost libraries, with -mt suffix
 set(Boost_USE_MULTITHREADED ON)
 option(Boost_USE_STATIC_LIBS "Link Boost statically" ON)
+if(WIN32)
+	option(Boost_USE_STATIC_RUNTIME "Link Boost against static C++ runtime libraries" ON)
+endif()
 
 set(BOOST_COMPONENTS "filesystem;unit_test_framework;program_options;system")
 
diff --git a/cmake/EthPolicy.cmake b/cmake/EthPolicy.cmake
index 4e29898cb..cc404e794 100644
--- a/cmake/EthPolicy.cmake
+++ b/cmake/EthPolicy.cmake
@@ -15,5 +15,9 @@ macro (eth_policy)
 		# do not interpret if() arguments as variables!
 		cmake_policy(SET CMP0054 NEW)
 	endif()
-endmacro()
 
+	if (POLICY CMP0091)
+		# Allow selecting MSVC runtime library using CMAKE_MSVC_RUNTIME_LIBRARY.
+		cmake_policy(SET CMP0091 NEW)
+	endif()
+endmacro()
diff --git a/cmake/jsoncpp.cmake b/cmake/jsoncpp.cmake
index 80a16f8d5..29b8f5f05 100644
--- a/cmake/jsoncpp.cmake
+++ b/cmake/jsoncpp.cmake
@@ -34,6 +34,12 @@ if(CMAKE_VERSION VERSION_GREATER 3.1)
     set(byproducts BUILD_BYPRODUCTS "${JSONCPP_LIBRARY}")
 endif()
 
+# Propagate CMAKE_MSVC_RUNTIME_LIBRARY on Windows builds, if set.
+if (WIN32 AND POLICY CMP0091 AND CMAKE_MSVC_RUNTIME_LIBRARY)
+    list(APPEND JSONCPP_CMAKE_ARGS "-DCMAKE_POLICY_DEFAULT_CMP0091:STRING=NEW")
+    list(APPEND JSONCPP_CMAKE_ARGS "-DCMAKE_MSVC_RUNTIME_LIBRARY=${CMAKE_MSVC_RUNTIME_LIBRARY}")
+endif()
+
 ExternalProject_Add(jsoncpp-project
     PREFIX "${prefix}"
     DOWNLOAD_DIR "${CMAKE_SOURCE_DIR}/deps/downloads"
@@ -51,6 +57,7 @@ ExternalProject_Add(jsoncpp-project
                -DJSONCPP_WITH_PKGCONFIG_SUPPORT=OFF
                -DCMAKE_CXX_FLAGS=${JSONCPP_CXX_FLAGS}
                -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
+               ${JSONCPP_CMAKE_ARGS}
     ${byproducts}
 )
 
diff --git a/scripts/install_deps.ps1 b/scripts/install_deps.ps1
new file mode 100644
index 000000000..bcf10eed9
--- /dev/null
+++ b/scripts/install_deps.ps1
@@ -0,0 +1,15 @@
+# Needed for Invoke-WebRequest to work via CI.
+$progressPreference = "silentlyContinue"
+
+New-Item -ItemType Directory -Force -Path "$PSScriptRoot\..\deps"
+
+Invoke-WebRequest -URI "https://github.com/Kitware/CMake/releases/download/v3.18.2/cmake-3.18.2-win64-x64.zip" -OutFile cmake.zip
+tar -xf cmake.zip
+mv cmake-3.18.2-win64-x64 "$PSScriptRoot\..\deps\cmake"
+
+Invoke-WebRequest -URI "https://dl.bintray.com/boostorg/release/1.74.0/source/boost_1_74_0.zip" -OutFile boost.zip
+tar -xf boost.zip
+cd boost_1_74_0
+.\bootstrap.bat
+.\b2 -j4 -d0 link=static runtime-link=static variant=release threading=multi address-model=64 --with-filesystem --with-system --with-program_options --with-test --prefix="$PSScriptRoot\..\deps\boost" install
+cd ..