Fitted kitchens and wardrobes in Greater Lisbon

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.

BEFORE

AFTER

Drag to compare. An illustration of a full renovation. The work we have delivered is in the gallery below, all of it photographed in clients’ own homes.

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

Bespoke U-shaped kitchen with flat pale-timber fronts, a stone worktop and a marble splashback

Bespoke kitchens

Built 100% to measure, with no prefabricated modules. High-resistance panels from the Austrian brand Egger, stone or compact worktops and precision hardware.

Floor-to-ceiling fitted wardrobe with three flush white doors and recessed grip handles

Fitted wardrobes

Full use of the space's height and width. Hinged or sliding doors, with interiors designed down to the millimetre for your storage needs.

White solid-core interior door with a stainless lever handle, beside a fitted wardrobe

Interior doors

Measured against the actual opening and finished before it ever enters your home. Solid-core doors with concealed hinges and hardware, for stability and elegance without hollow panels.

Staircase with a slatted timber balustrade and built-in cupboards under the treads

Creative Joinery

Made-to-measure pieces that combine function and style. Bespoke cabinets, staircases, slatted panels and one-of-a-kind furniture to elevate the design of your space.

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.

Kitchen in pale ash, with a marble panel and a peninsula01

Oak staircase with vertical balusters, and storage built into the space beneath04

Kitchen in matt grey and oak, with a breakfast bar and a slatted ceiling feature05

Sliding-door wardrobe in light wood, with shelves and drawers on show06

Double door in oak, with frosted glass and the frame on show07

Wall panelling in pale wood, with tall fronts and aligned joints08

L-shaped kitchen with white fronts, a band of wood and a dark worktop09

Inside a fitted wardrobe, with shelves, drawers and hanging space10

Bedroom with two flush oak doors and wide architraves11

Oak balusters running up the staircase, seen close up12

Kitchen with a wooden peninsula, dark worktop and three pendant lights13

Kitchen in oak and beige, with a marble panel and built-in ovens14

Kitchen with a stone island, navy units and a ceiling extractor15

L-shaped kitchen in beige and oak, with a terracotta floor and concealed lighting at the plinth16

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.

THE WORK BEHIND US

Numbers, not promises.

Projects delivered, years in the trade and deadlines met. What a joinery is worth shows in what it has finished, not in what it says.

0+

Completed projects

0+

Years in the trade

0%

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.