Spaces of distinction.
Built to last.
Bespoke kitchens, joinery and cabinetry across Greater Lisbon and the Tagus Valley, with precise planning and a flawless finish.
ABOUT ARITMÉTICA DAS LINHAS
Built on trust and commitment
We design, build and install every project ourselves. One single point of contact for transparent planning, reliable project management and a masterful finish.
WHY ARITMÉTICA DAS LINHAS
Seriousness and rigour at every stage of your project.
Twenty-five years crafting exclusive, made-to-measure kitchens. We guarantee outstanding materials and a genuinely competitive price for the quality you get.
OUR SERVICES
Integrated solutions for functional, distinctive and long-lasting spaces.
From a full renovation to the final detail, with structure, method and quality.
Drag to compare. Kitchen in Algueirão-Mem Martins, six weeks from the first demolition to handover of the keys.
WHERE WE OPERATE
Where we work
Sintra
Sintra · Algueirão-Mem Martins · Cacém · Queluz · Rio de Mouro
Grande Lisboa
Cascais · Oeiras · Odivelas · Lisboa · Loures · Vila Franca de Xira · Bobadela · Mafra · Ericeira · Torres Vedras
Margem Sul
Almada · Seixal · Barreiro · Montijo · Moita · Palmela · Sesimbra · Setúbal
Santarém
Benavente · Samora Correia · Santarém · Cartaxo · Almeirim · Rio Maior
COMPLETED PROJECTS
Finished spaces, detail that lasts
We only show photographs of kitchens and finished work in our clients' own homes. Complete transparency, no computer-generated images.
OUR PROCESS
Clear from the first visit to the final inspection
A cleaner way to run a renovation
01
Booking your meeting
We set the date for your first meeting to suit your schedule, right from the first contact.
02
In the comfort of your home
We turn your space into the starting point for the design. We bring physical samples, confirm the measurements on site and design the project entirely at your convenience.
03
Carrying out the work
Methodical organisation with site supervision throughout. The same team from start to finish, ensuring full transparency, close contact and quality control on site.
04
Handover and final sign-off
A joint inspection with a thorough checklist. Any final touch-ups resolved and the project formally closed. We guarantee a result fully in line with your expectations.
WHAT OUR CLIENTS SAY
Ask those who have lived through the project with us
Feedback from clients who wanted transparency throughout the process and excellence in the final result.
”The quote I signed was the amount I paid. On a renovation, that is already half the battle.”
Ricardo M.
Bespoke kitchen, Sintra
”We stayed in the house during the works. Every day the crew left everything clean and covered. It made all the difference.”
Sofia C.
Three-bedroom renovation, Cascais
”I asked for a wardrobe for an impossible corner. They measured, designed and it fitted to the millimetre.”
João P.
Fitted wardrobe, Oeiras
Completed projects
Years in the trade
Deadlines met
PREMIUM MATERIALS, STANDARD PRICE
Your premium kitchen, made to the millimetre.
Luxury design, standard pricing and the convenience of deciding from home.
Aritmética das Linhas
- Carpentry, plumbing and electrics under one single management.
- Timeline and budget agreed from day one.
- A progress update shared at every stage.
- Technical guidance when choosing materials.
- Final details checked before handover.
Traditional contractor
- Trades handed off to third parties.
- Costs and deadlines reviewed too late.
- Communication depends on whoever is on site that day.
- Materials chosen at the last minute.
- Final checks only after problems appear.
QUESTIONS
Frequently Asked Questions About the Company
If you cannot find your answer here, just send us your question through the form.
We work across Greater Lisbon and the Tagus Valley, covering municipalities such as Lisbon, Sintra, Cascais, Oeiras, Amadora and Setúbal.
The site visit to take measurements and show physical samples is completely free, with no obligation. We reply to your first enquiry within 24 working hours.
Yes. Aritmética das Linhas manages everything directly, from carpentry to plumbing and electrics, without scattering the work across subcontractors.
It depends on the scale of the work, but the team keeps the site tidy every day and protects your rooms to keep the disruption to your routine to a minimum.
With 98% of deadlines met, prices and schedules are fixed before work starts, keeping the plan transparent from day one through to the final inspection.
SHARE YOUR VISION FOR THE RENOVATION WITH US
Tell us what you would like to build or renovate
Just two quick questions. We will reply within 24 working hours with the next steps.