Moving a kitchen can look like a simple layout choice: take the sink into the living room, turn the former kitchen into a bedroom, or create a larger social area. In a Lisbon apartment, the real decision is usually hidden behind the walls and below the floor. The new location must take water, drainage, electricity and ventilation without harming the flat below, shared systems or the building itself.
Two separate questions need answering at the outset: is the work exempt from municipal prior control? and does it affect common parts or condominium rules? A positive answer to one does not replace the other. This guide sets out the information worth gathering before asking for comparable quotations, explaining the proposal to the building manager and starting demolition.
Separate a furniture change from a services relocation
If the kitchen stays in the same place and only the cabinets, finishes and appliances change, the technical risk is usually more contained. Moving the sink, dishwasher, hob and washing area into another room changes the routes for water, wastewater, electricity and extraction. That is when an attractive floor plan is no longer enough.
Start with a basic survey of the existing conditions: the location of water and waste stacks, the level of the drainage branch, the electrical panel, any ventilation duct and walls that may have a structural role. In older buildings, a thick wall or an apparently redundant boxed-out section can conceal a shared duct. Review the existing drainage and plumbing system before renovation before settling on the final kitchen position.
Do not assume pipes can simply be extended inside a suspended ceiling. Wastewater needs suitable fall, valves and traps need access, pipework crossing living spaces needs acoustic treatment, and any future leak should be repairable without demolishing half the apartment.
Stacks and general services are not solely part of your apartment
Under Portugal’s horizontal-property rules, general water, electricity, heating, air-conditioning, gas and communications installations are listed among the building’s common parts. This does not make a new kitchen connection impossible. It means a shared stack should not be opened, altered or loaded as if it were private pipework.
Where the proposal requires work on a common vertical stack, a slab penetration for a new drain, use of a collective duct or external equipment, provide the building manager with a drawing, a short technical description and a precise record of what will be opened and reinstated. Read the Civil Code provisions on horizontal property and common parts before turning an informal discussion into a construction decision.
A sound submission identifies who is responsible for execution, testing, reinstatement of finishes and damage directly caused by the work. Do not ask the condominium for a vague approval to “build a new kitchen”; describe the specific solution that will be carried out.
Check whether the internal work is truly exempt from municipal control
In Lisbon, internal alteration works in buildings or individual units may be exempt from licensing or prior notification where they do not affect the stability structure, building height, façade form, roof or covering, and do not involve removing façade tiles. The city explains the rule in its guidance on exempt works and public-space occupation.
“Internal” does not automatically mean “exempt”. Opening a slab, changing a structural wall, making a new façade outlet, altering a chimney or formally changing the unit’s use can change the planning position. Heritage protections, protected areas and building-specific constraints may also apply.
Where the design is still being tested and there is a genuine question over feasibility, a prior information request can clarify municipal constraints before a full project is commissioned. Lisbon City Council describes this route under prior information requests. It is particularly useful when moving the kitchen is linked to a change of use, external work or uncertainty about protected elements.
Do not select the new position simply because it is near a window
A window helps with daylight and everyday airing, yet it does not by itself solve cooking-fume extraction. Before designing cabinets, establish whether there is a usable existing duct, what extractor arrangement is technically appropriate and where air will discharge. A recirculating hood may reduce odours close to the hob, but it does not replace a ventilation strategy for the room.
Check the available electrical capacity as well. An induction hob, oven, dishwasher, refrigerator and smaller appliances may require a review of the panel, dedicated circuits and protective devices. If the kitchen moves across the apartment, organise higher-load appliances around a sensible electrical route rather than multiplying hidden extensions.
Test circulation on site: the clear route with doors open, the gap between worktop and table, the path for rubbish and the arrival of shopping. A relocated kitchen works best when new pipework remains short and accessible, even if that means adjusting the cabinet layout by a few centimetres.
Bring a prepared proposal to the manager or condominium meeting
Communication with the condominium is not a request for views on cabinet style. It allows the building to assess work that may affect shared components, working hours, lift use, circulation and noise. Send the material before ordering finishes or fixing demolition dates.
- existing and proposed plans, clearly locating the kitchen;
- the intended water, drainage, ventilation and electrical routes;
- any work to walls, floors, ceilings, slabs or façades;
- estimated dates, working hours and contractor contacts;
- protection for lifts, stairs and shared areas;
- the method for waste removal and deliveries.
Where work changes the building’s architectural line or appearance, the Civil Code provides for prior assembly approval by a majority representing two thirds of the total value of the building. Keep the minutes and technical attachments. They provide a record of what was approved and help coordinate the work properly.
Specify tests, access points and reinstatement before closing up
The difficult part of a relocated kitchen often appears after finishes are complete: slow drainage, water noise in the neighbouring bedroom, smells from a dry trap or a leak below a new floor. Include pressure and watertightness checks, discharge testing, flow verification and ventilation checks in the work specification before ducts, ceilings and boxing are closed.
Ask for photographs of service routes, with enough reference points to locate valves and joints later. Where connections or equipment may need maintenance, allow for a discreet access panel. The same discipline applies when planning sockets and switches before the walls are closed: the electrical layout should follow the final kitchen design rather than arrive after installation.
Finally, agree how any removed element will be reinstated in common areas and in the apartment below if access to a stack becomes necessary. A properly prepared project anticipates that possibility instead of turning it into an urgent dispute.
Planning to move your kitchen in a Lisbon apartment? Obra Lisboa can help turn the technical survey, condominium coordination and construction sequence into a clear plan before the walls are opened.
AI-generated editorial image; it does not depict an Obra Lisboa project.
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