English speaking Architect in Barcelona positive home

Sustainable renovation ON time ON budget in Barcelona, Sitges and Mataró
Build a positive house prefab in CLT wood with passive house systems

With English speaking architects experts in passive house and energy efficency


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5 full stars
(45 reviews)

‘Very professional and thorough service’,
‘Truly appreciated the innovative design features of our English speaking architect in Barcelona’,
‘Our project was being managed by someone whom we had complete trust’
‘Saved us time and money in managing aspects of the project that have been impossible to run from our home in South Africa’


‘Truly appreciated the regular communication, keeping us informed of progress, sending us photographs of the work, managing the budget and dealing with the municipal authorities’,
‘the contractors arranged were professional and helpful’
‘it was reassuring for us to know that the design and contract was being managed by someone with aesthetic sense, attention to detail and willingness to ensure that the work executed by all contractors was to the highest standard’

what they say
Certified Passive House Designer in Barcelona
Best women in business in Europe
Best women in business in Europe
Best women in business in Europe

 Turnkey sustainable renovation in Barcelona city
Turnkey Passive House builder in Barcelona
Positive home renovation Barcelona city

English speaking Architect in Barcelona positive home



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your positive home at a fixed price and calendar




We analyze the space and energy needs.
We design sustainable solutions for YOU.
We show you solutions in 3D and Virtual Reality.
We quote and program all works (yes in a very early stage).



We calculate structure and prepare paperwork in studio.
We ask for license to the Town Hall.
We propose mood boards for interior (colors, lights, furniture).
You go shopping materials with our personal shoppers.


We get the site control
You get vacations! (if you want)
You get weekly updates
You avoid the dust (if you want)
We FINISH your house build in 6 MONTHS


You get a memorable welcome back (sorry, no spoilers!).
You get a photoshoot of your new space.
You get real DATA of how healthy your space is.
You get your desired unique and sustainable space!



I’m Esther, the person behind ERA architects.
I’m a fluent English speaking architect based in Barcelona (also an official passive house designer).

Since I was 2 years old, I’ve been enjoying nature actively through sports.
My dad was a skiing instructor, so I spent my winters skiing and summers trekking or mountain biking.
When I was 16, I spent a school year in Canada where I was amazed by its kind people and the wild Nature.
After university I worked and traveled abroad delivering ambitious projects for awarded firms globally in places like Toulouse, Rotterdam, Seoul, Nanjing (China), Keelung (Taiwan) and Barcelona (Nou Camp Nou for Football club Barcelona).
The 2008 crisis brought me back to study to deliver more direct needs to people and our planet.

Today, as an English speaking architect in Barcelona, I’ve developed a method to understand the essential needs of our clients to DELIVER integrated, turnkey, unique, bio Passive House new builds through our teams of local professionals together with the help of existing subsidies.
In 2022 we finished the 1st Passive House PLUS certified with ytong system of Southern Europe.
In 2023, we’re building 3 Passive houses with wood systems to deliver the house build in less than 6 months.
I’m gonna let our clients speak so you can judge yourself (check happy clients here).

Happy to talk to you to start delivering your dream green home.
Let’s talk!

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Build a green home in Spain
by Barcelona architect Esther Rovira (Passive House expert)

build a green home in Spain BLOG