How long do basement renovations take?

Basement renovations typically take 1–6 weeks depending on the scope of work. A straightforward surface refurbishment is completed in 1–2 weeks. A medium-scale renovation including moisture control takes 2–4 weeks. Extensive full renovations take 4–6 weeks.

How much do basement renovations cost?

A small basement renovation (surface refurbishment) costs €2,000–4,000, a medium renovation including moisture control €4,000–8,000, and an extensive full renovation €8,000–15,000. The price depends on the size and condition of the basement and the materials chosen. Remember the household tax deduction: you can claim back 60% of the labour cost from your taxes, up to €3,500 per year.

Does moisture need to be considered in a basement renovation?

Yes, moisture control is a critical part of any basement renovation. We always carry out thorough moisture measurements on the structures before starting work. Where needed, we install waterproofing, repair drainage, and ensure adequate ventilation.

Can a basement be converted for residential use?

Converting a basement for residential use is possible under certain conditions. Building regulations require sufficient room height (min. 2.5 m), moisture control, fire safety, and adequate ventilation. We will determine on your behalf whether your basement can be converted and what permits are needed.

Is moisture insulation included in the price?

Moisture insulation work is priced on a case-by-case basis and included in the quote if required. We carry out a free home survey to assess the moisture situation. The quote clearly itemises all work stages and materials.

Is a building permit needed for a basement renovation?

It depends on the scope of the renovation. Surface work does not require a permit. A building permit is needed if you modify load-bearing structures or change the intended use of the basement. We will determine on your behalf what permits your renovation requires.

Can a utility room or sauna be built in the basement?

Yes, provided that moisture control and the technical prerequisites are in place. A utility room requires water connections, drainage, electrical supply, and ventilation. A sauna additionally requires electrical connections for the heater and appropriate insulation. We carry out the construction of both types of space with professional expertise.

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Basement Renovations

Professional basement renovation in Helsinki and Uusimaa. Moisture control, insulation, and space refurbishment.

Free assessment with 24h response

Fixed price with no surprises

Over 20 years of local experience

4.8/5 • 3 500+ kellariremonttiia

20+ years of experience

Trusted partner

Luotetut kumppanit

Who are basement renovations for?

Basement renovations add extra space and improve the comfort of your home

Detached houses

Basement spaces converted into storage, hobby rooms, or living areas

Terraced houses

Renovation of basement storage units and utility rooms

Moisture problems

Professional moisture control and repair of moisture damage

Need for extra space

Transform your basement into a functional extra living area

How a basement renovation progresses

A simple and clear process for professional renovation

Get in touch

Survey

We carry out a free home survey and moisture measurements.

Execution

We complete the renovation on the agreed schedule.

Handover

We inspect the work together and hand over the finished space.

Professional basement renovation — Kevyt Remppa

Basement spaces back in working order

We transform basement spaces into comfortable and functional areas. We take care of moisture control, insulation, and surface finishes properly. The end result is a dry, safe, and usable extra space for your home.

Moisture survey and control
Floor and wall surface renewal
Insulation and temperature management
Electrical work and lighting solutions
Comprehensive execution from a single provider

What do basement renovations include?

Moisture control

We carry out thorough moisture measurements and analyse the basement structures before starting work. We install the necessary moisture barriers using waterproofing membranes and compounds, attend to drainage and ventilation. All work is done in accordance with building regulations to keep your basement dry for decades.

Insulation work

We install appropriate thermal and moisture insulation on basement walls, floors, and ceilings as needed. We use high-quality insulation materials suited to damp conditions. Properly executed insulation improves energy efficiency, reduces heating costs, and makes the basement a more comfortable space all year round.

Floor and wall surfaces

We refurbish basement floor and wall surfaces with your chosen materials. We offer concrete floor grinding and coating, tiling, laminate or vinyl flooring, as well as wall painting and boarding. All surfaces are completed with moisture control as the primary consideration and durability in mind, ensuring a long-lasting and easy-to-maintain result.

Construction work

We carry out the necessary structural changes in the basement: building new partition walls, removing old ones, opening or modifying doorways, and constructing storage spaces. We use moisture-resistant materials and structural solutions. We also handle the required structural plans and permits where the work demands it.

Fast schedule

We plan the work schedule together with you and aim to start as soon as possible. Project duration depends on the scope of the renovation: simple refurbishment work is completed in 1–2 weeks, larger renovations in 3–6 weeks. We keep you up to date on project progress and adhere strictly to the agreed schedule.

Transparent pricing

You always receive a written, detailed quote before work begins. Our pricing has no hidden costs — all labour and materials are clearly itemised. We also offer flexible payment schedules and the option to claim the household tax deduction. Payments are staged according to work progress, so you do not pay upfront.

Basement Renovations — Price Packages

Choose the package that best suits your needs or request a tailored quote

Small basement renovation

Suitable for minor refurbishment and surface renovations

2,000 – 4,000 €

Surface refurbishment (painting, levelling)
Minor moisture damage repair
Floor coating or painting
Wall refurbishment
Basic lighting upgrade
Work guarantee

Suosituin

Medium basement renovation

Comprehensive refurbishment for a 20–40 m² space

4,000 – 8,000 €

Moisture control and waterproofing
Floor and wall renewal
Insulation work
Electrical work and lighting
Painting and finishing work
Guarantee on all work
Household tax deduction available

Large basement renovation

Comprehensive renovation for larger spaces

8,000 – 15,000 €

Complete moisture control
Floor, wall, and ceiling work
Thermal and moisture insulation
Comprehensive electrical and plumbing work
Partition wall construction
Ventilation upgrade
Premium materials
Comprehensive guarantee

Prices are indicative and depend on the size and condition of the basement and the materials chosen. Request a free quote for an exact price. The household tax deduction reduces the labour portion by 60%, up to €3,500 per year.

Factors affecting the price

Basement size and scope: The larger the basement, the more materials and labour hours are needed. A small storage basement is more affordable than a large residential basement.
Moisture damage and extent: Extensive moisture damage, mould problems, and structural repairs significantly increase costs. Waterproofing and drying add to the workload.
Insulation and floor solutions: Thermal and moisture insulation, underfloor heating, and high-quality floor materials affect the price. Standard solutions are more affordable.
Structural changes and layout alterations: Building partition walls, adding doors, and upgrading electrical and plumbing systems significantly increase the scope and cost of the project.

Guides and more about basement renovations

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We serve across Finland

We carry out professional basement renovations across the Helsinki metropolitan area. Get in touch and we'll tell you more!

Basement Renovations Helsingissä

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Basement Renovations Tampereella

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Basement Renovations Lahdessa

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Why choose Kevyt Remppa for your basement renovation?

20 years of experience — Our skilled team delivers quality basement renovations from start to finish
Fixed price — A clear quote upfront with no surprises. Household tax deduction available
Guaranteed work — Comprehensive guarantee and aftercare on all our work
Promised schedules — We keep our promises and complete the work on time
Helsinki metropolitan area — We serve the Helsinki, Espoo, Vantaa, and surrounding areas
Full-service approach — We handle every stage from planning to finishing

Basement renovations in the Helsinki metropolitan area

A basement is often an undervalued space in a home, yet when properly renovated it can become valuable extra space for storage, hobbies, or even living. Kevyt Remppa specialises in basement renovations in Helsinki, Espoo, Vantaa, and elsewhere in the Helsinki metropolitan area. We take care of everything from moisture control to surface materials.

In a basement renovation, the most critical factor is moisture control. We always carry out thorough moisture measurements and assess the condition of the structure before starting work. Where needed, we install waterproofing on floors and walls, repair or renew drainage, and ensure adequate ventilation. We use only building materials and techniques suited to damp conditions, so the end result will last for decades.

We offer a wide range of basement renovation services: floor and wall refurbishment, painting, tiling, partition wall construction, insulation work, doorway modifications, and storage solutions. All work is carried out with professional skill and care. We also assist with permit applications and structural planning where needed, so your renovation proceeds smoothly and in compliance with regulations.

Get in touch and book a free home survey. We will review your basement space together, discuss your wishes, and prepare a detailed quote. From us you get professional execution, transparent pricing with no surprises, and flexible payment schedules. Take advantage of the household tax deduction and claim back up to 60% of the labour cost from your taxes!

Frequently asked questions

Find answers to the most common questions here. Don't hesitate to contact us if you can't find an answer!

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