Homebrew permission denied on file I own with rwx permissions - macos

Question

I have a 2016 MacBook Pro (w/ touchbar) and Mac OS Sierra (10.12.3). I freshly installed Homebrew (v1.1.9) and ran brew install gcc49. It appears to install all dependencies fine, but once it gets to gcc, I get
Error: Permission denied - /Users/<me>/Library/Caches/Homebrew/gcc#4.9-4.9.3.tar.bz2
Original permissions after downloaded by Homebrew:
-rw-r--r-- 1 <me> <company_domain> 86M Jun 26 2015 /Users/<me>/Library/Caches/Homebrew/gcc#4.9-4.9.3.tar.bz2
I tried setting to 755 and group to admin, but no luck:
-rwxr-xr-x 1 <me> admin 86M Jun 26 2015 /Users/<me>/Library/Caches/Homebrew/gcc#4.9-4.9.3.tar.bz2
> brew install gcc49
Updating Homebrew...
==> Using the sandbox
==> Downloading https://ftpmirror.gnu.org/gcc/gcc-4.9.3/gcc-4.9.3.tar.bz2
Already downloaded: /Users/<me>/Library/Caches/Homebrew/gcc#4.9-4.9.3.tar.bz2
Error: Permission denied - /Users/<me>/Library/Caches/Homebrew/gcc#4.9-4.9.3.tar.bz2
I then chowned the directory to be group admin instead of the company domain. It already had 775 permissions. Still no luck.
I have seen several posts where people had to chown directories to make homebrew happy, but I don't see permission issues on the given file or directory.
brew doctor reports some unexpected dylibs, header, and .pc files. I'm not sure if those came from my company's Mac OS image.
Am I overlooking something obvious? I appreciate any help.
Here is the entire initial install output:
> brew install gcc49
==> Installing dependencies for gcc#4.9: gmp#4, mpfr#2, libmpc#0.8, isl#0.12, cloog
==> Installing gcc#4.9 dependency: gmp#4
==> Downloading https://homebrew.bintray.com/bottles/gmp#4-4.3.2.sierra.bottle.1.tar.gz
######################################################################## 100.0%
==> Pouring gmp#4-4.3.2.sierra.bottle.1.tar.gz
==> Caveats
This formula is keg-only, which means it was not symlinked into /usr/local.
This is an alternate version of another formula.
For compilers to find this software you may need to set:
LDFLAGS: -L/usr/local/opt/gmp#4/lib
CPPFLAGS: -I/usr/local/opt/gmp#4/include
==> Summary
🍺 /usr/local/Cellar/gmp#4/4.3.2: 20 files, 2.4M
==> Installing gcc#4.9 dependency: mpfr#2
==> Downloading https://homebrew.bintray.com/bottles/mpfr#2-2.4.2.sierra.bottle.1.tar.gz
######################################################################## 100.0%
==> Pouring mpfr#2-2.4.2.sierra.bottle.1.tar.gz
==> Caveats
This formula is keg-only, which means it was not symlinked into /usr/local.
This is an alternate version of another formula.
For compilers to find this software you may need to set:
LDFLAGS: -L/usr/local/opt/mpfr#2/lib
CPPFLAGS: -I/usr/local/opt/mpfr#2/include
==> Summary
🍺 /usr/local/Cellar/mpfr#2/2.4.2: 25 files, 2.7M
==> Installing gcc#4.9 dependency: libmpc#0.8
==> Downloading https://homebrew.bintray.com/bottles/libmpc#0.8-0.8.1.sierra.bottle.1.tar.gz
######################################################################## 100.0%
==> Pouring libmpc#0.8-0.8.1.sierra.bottle.1.tar.gz
==> Caveats
This formula is keg-only, which means it was not symlinked into /usr/local.
This is an alternate version of another formula.
For compilers to find this software you may need to set:
LDFLAGS: -L/usr/local/opt/libmpc#0.8/lib
CPPFLAGS: -I/usr/local/opt/libmpc#0.8/include
==> Summary
🍺 /usr/local/Cellar/libmpc#0.8/0.8.1: 12 files, 273.8K
==> Installing gcc#4.9 dependency: isl#0.12
==> Downloading https://homebrew.bintray.com/bottles/isl#0.12-0.12.2.sierra.bottle.1.tar.gz
######################################################################## 100.0%
==> Pouring isl#0.12-0.12.2.sierra.bottle.1.tar.gz
==> Caveats
This formula is keg-only, which means it was not symlinked into /usr/local.
This is an alternate version of another formula.
For compilers to find this software you may need to set:
LDFLAGS: -L/usr/local/opt/isl#0.12/lib
CPPFLAGS: -I/usr/local/opt/isl#0.12/include
==> Summary
🍺 /usr/local/Cellar/isl#0.12/0.12.2: 57 files, 2.9M
==> Installing gcc#4.9 dependency: cloog
==> Downloading https://homebrew.bintray.com/bottles/cloog-0.18.4_1.sierra.bottle.tar.gz
######################################################################## 100.0%
==> Pouring cloog-0.18.4_1.sierra.bottle.tar.gz
🍺 /usr/local/Cellar/cloog/0.18.4_1: 35 files, 442.4K
==> Installing gcc#4.9
==> Using the sandbox
==> Downloading https://ftpmirror.gnu.org/gcc/gcc-4.9.3/gcc-4.9.3.tar.bz2
==> Downloading from http://mirror.easthsia.com/gnu/gcc/gcc-4.9.3/gcc-4.9.3.tar.bz2
######################################################################## 100.0%
Error: Permission denied - /Users/<me>/Library/Caches/Homebrew/gcc#4.9-4.9.3.tar.bz2

Answer 1

Try to sudo chown -R <me>:admin /usr/local/* and try again. You may need to restore some user or group ownership recursively (which this command will do).