construction of foundations of any complexity
TURNKEY FOUNDATION
Time-tested craftsmen
Technical supervision at every construction stage
We work throughout Ukraine
online calculator for foundation construction costs
Express cost estimate for a foundation, taking geology into account. Suitable for initial budget planning and choosing the base type. A calculator that combines engineering and transparency: choose a type, enter parameters — get a realistic price and next steps.
FOUNDATION FOR A WOODEN HOUSE
Strip foundation
A reinforced concrete strip (monolithic or assembled from panels, blocks) that runs around the perimeter, closing the outline of the entire structure. All the load-bearing walls of the house are built on this strip. The upper part of the foundation is called the plinth. For significant structure weight, a sand-and-gravel cushion is arranged under the foundation and covered with waterproofing. The foundation depth depends on soil quality and loads
Most often used in private construction for country houses and dachas whose walls are built of concrete, brick, wood or stone, as well as in projects that include a basement or garage. This foundation is popular in construction due to the simplicity of its technology and the reliability of the structure. However, financial and labour costs also increase accordingly.
Pier (column) foundation
The foundation structure consists of massive piers made of brick, concrete, reinforced concrete or stone, located at the corners of the structure as well as at points of increased load (wall intersections). The lower part of the piers is widened to distribute and reduce loads on weak soils. All supports are connected to each other by a frame (grillage). The space between the piers is filled with crushed stone and covered with a layer of concrete. Depending on the soil type, a sand cushion may be required.
Used for lightweight houses with light-frame construction. For example, wooden, panel or frame houses made of various types of timber. Distinguished by relatively low cost and quick construction, but excludes a basement or ground floor. This foundation should not be built on heaving soils, as it has poor stability on unstable ground.
Monolithic foundation (variants include slab foundation, floating foundation)
The basis of the foundation is a special monolithic reinforced concrete slab laid on a layer of crushed stone. Such slabs are made directly on site. As a rule, the slab is not buried.
All load-bearing elements of the structure rest on this slab. The special feature of the design is that the monolithic reinforced concrete slab can shift together with the building, compensating for ground fluctuations, which is why it is called “floating”. The surface under the foundation base must be perfectly level. The advantage of this type of foundation is the absence of restrictions when planning changes to the structure and its strength. It should be noted that installing a waterproofing layer is a mandatory condition for extending the service life of the house.
Used both for building small country houses and cottages with up to 3 storeys, and for high-rise buildings. The foundation slab serves as the base of the floor. This is a fairly reliable type of foundation that withstands high loads and temperature fluctuations. Its design allows for any redesign of the house.
Used both for building small country houses and cottages with up to 3 storeys, and for high-rise buildings. The foundation slab serves as the base of the floor. This is a fairly reliable type of foundation that withstands high loads and temperature fluctuations. Its design allows for any redesign of the house.
Pile foundation (on driven piles)
An analogue of the pier foundation. Has many variations in construction method. The basis of the foundation structure consists of piles – supports that are driven into the ground down to firm soil layers, to which all structural loads are transferred. Piles can be made of concrete, steel, or wood. However, an asbestos pipe filled with cement mortar can also be used as a support (pile). The upper part of the piles is joined by a chain of beams. The pipes resist frost heave well and can reduce concrete consumption.
Used in large-scale construction of buildings, bridges, power lines due to its increased load-bearing capacity. The advantages of this foundation include its reliability, durability, fast installation and minimal settlement over time. However, the pile foundation is not widely used in construction, as it is one of the most expensive and labour-intensive foundations. The choice of this foundation is most often due to unstable ground, high groundwater levels at the chosen site, marshy terrain or uneven landscape.
Screw pile foundation
The foundation structure is built on screw piles, in areas with a high groundwater level or unstable topsoil. A screw pile is a steel pipe with a spiral blade around the shaft, which is screwed deep into the ground. Its presence allows the soil around the base of the pile underground to be compacted. The above-ground part of all piles is cut off at the same level and filled with a concrete mixture. Characterised by high load-bearing capacity, installation speed, and at the same time cost-effectiveness (costs can be 40% lower than building a strip foundation).
The choice of a screw pile foundation is often due to the impossibility of building other types of foundation because of soil features (marshy, peaty or waterlogged). This type of foundation is mainly used for building low-rise (frame, wooden) country houses on difficult terrain. It can be built in a short time in any season.
As we can see, the choice is wide. Each option has its own pros, cons and features. Therefore, each individual case requires careful consideration.
SHORT COMPARATIVE ANALYSIS OF FOUNDATION TYPES
| Foundation type | Recommended soils | GWL (groundwater level) | Site relief | Basement | Installation speed | Estimated cost* | Advantages | Limitations/risks | Where to use |
|---|---|---|---|---|---|---|---|---|---|
| Monolithic slab (floating) | Weak/medium (sandy loam, loam), heterogeneous | Medium/high (with drainage) | Flat/moderate slopes | No (or minimal crawl space) | 5–10 days | from €85–110/m² of concrete + reinforcement/preparation | Distributes load evenly, minimal cracking, good for difficult soils | Requires quality base preparation, more concrete | Frame/CLT/timber, energy-efficient houses |
| Swedish platform (insulated slab) | Same as for slab + preferably stable | Medium/high (with drainage) | Flat | No | 6–12 days | from €120–160/m² of slab (with insulation, utilities) | Integrated insulation, less heat loss, built-in utilities | Higher starting cost, demanding design/drainage requirements | Energy-efficient projects, low floor level |
| Strip (shallow/deep) | Medium/dense (loam, sandy loam, clay) | Low/medium | Flat/moderate | Yes (for deep foundation) | 7–14 days | from €70–95/linear m (conditional 400×600 mm) | Allows a basement, familiar technology, convenient for load-bearing walls | Sensitive to heaving, more earthworks | Houses with basement/plinth, classic layouts |
| Pier (piers + grillage) | Medium/dense, non-heaving | Low | Flat | No | 3–7 days | from €40–70/pier + grillage | Minimal concrete, fast, budget-friendly | Load/architecture limitations, difficult with ground-level floor | Light structures, terraces, outbuildings |
| Pile (bored/driven) + grillage | Weak/waterlogged, peat, fill | Medium/high | Slopes/difficult relief | No | 5–9 days | from €120–180/pile (Ø/depth) + grillage | Reaches dense layers, minimal earthworks | Equipment/geology mandatory, noise/vibration (driven) | Difficult soils, high GWL, slopes |
| Screw pile (steel piles) + grillage | Weak/waterlogged (without large boulders) | High | Any (including slopes) | No | 1–3 days | from €80–120/pile + grillage | Very fast, minimal “wet” processes, removable | Corrosion without protection, not for rock/boulders, calculation required | Fast assembly, seasonal/modular solutions, difficult access |
* The cost is a guide for initial planning. We calculate the exact price after geology/geodesy, reinforcement calculations, the design and logistics.
What our clients say
FAQ
Depending on the type and soil:
Slab: 5–10 days of work + time for the concrete to gain strength.
Strip: 7–14 days.
Piles/screw piles: 1–4 days (without grillage installation).
We confirm the timeframe after a brief (area, geology, groundwater level, logistics).
- Soil type. If the soil has good physical-mechanical properties and load-bearing capacity, either a slab, strip or pier foundation is used. If the soil’s load-bearing capacity is low, contains debris, organic matter, or is waterlogged, pile, pile-grillage or strip-pile types have to be used. They transfer the load to deeper soil layers with higher physical-mechanical properties
- Load on the foundation. If loads are small and the soils are uniform, the cheapest foundation options are used – strip, strip-block. These are the most technologically efficient and quick to install
- Architectural and layout decisions. When choosing the foundation type, the spacing of vertical structures and the size of spans must be taken into account
- Groundwater level and presence of flooding
- Seismicity of the area
- Deep – built below the frost line to prevent heaving.
- Shallow – set above the frost line (usually no deeper than 0.7 m). Less effective at resisting frost heave; quality thermal insulation is needed to minimise this effect.
- Surface (unburied) – built at ground level, not used for building full-fledged houses. Optimal for fences and small structures made of lightweight materials.
- natural stone, rubble and rubble-concrete
- artificial stone, concrete blocks, ceramic stone
- metal (pile)
- concrete (reinforced concrete, porous concrete) and special types
- Prefabricated (from blocks, slabs or beams, joined with cement mortar)
- Monolithic (formwork is built first, then concrete is poured into it) – and this is the strongest option
- Combined (prefab-monolithic, monolithic-prefab, however you like)
The cost of building a foundation depends primarily on its type. We’ve looked at all the main types of foundations for a private house, and you’ve already been able to compare their features. The price is also shaped by construction complexity.
Other factors affecting cost:
- overall dimensions
- foundation depth
- need for comprehensive waterproofing measures (e.g. with a high groundwater level)
- materials used
- presence of a basement level
Manual excavation of the foundation trench
Backfilling the foundation trench
Creating a crushed-stone cushion up to 10 cm
Creating a compacted sand cushion for the foundation
Manufacturing and installing foundation formwork
Building a strip foundation
Preparing concrete mix for the foundation
Reinforcing the RC belt for the foundation
Manual concreting of the RC belt (without mixing on-site)
Installing a monolithic RC belt for the foundation using a mixer truck
Installing embedded elements for utility networks
Waterproofing the foundation
Insulating the foundation
Installing screw piles
Installing reinforced concrete piles
Waterproofing protects the foundation from the negative effects of water and aggressive environments. There are various types of waterproofing, but the most common are: applied membrane and coating waterproofing.
In this case, applied membrane waterproofing refers to bitumen roll waterproofing. Coating waterproofing refers to bituminous mastic waterproofing.
Foundation insulation is used to retain heat in the house, as well as to reduce the effect of frost heave on it. The insulation technology depends on the type of base, its depth, etc.
As a rule, extruded polystyrene foam with increased density and strength is used to insulate foundations, which prevents damage during backfilling and under soil pressure. In addition to the foundation itself, the blind area, which is built around the perimeter of the building, also needs to be properly insulated.
Slab — when soils are heterogeneous or weak, frost heave is possible, groundwater level is high, and a level, rigid base is needed.
Strip — on stable soils, without a basement, with moderate loads.
Piles/screw piles — when the upper layers are weak/waterlogged and it makes sense to transfer the load deeper.
The final decision is made after geology and calculations.
Yes. We organise engineering-geological surveys (2–3 boreholes, a report with cross-sections, bearing capacity indicators, groundwater level). Based on the results, we design drainage/stormwater systems, waterproofing, insulation of the slab/strip, and the blind area. This reduces the risks of settlement, cracking and waterlogging.
An “as-built” package: reinforcement diagram, foundation as-built drawing, hidden works acts, material passports/certificates, photo report, work log. If needed — “before/after” geodetic survey.
Yes, at temperatures down to −10°C with winter protocols: heating/setting accelerators, thermal covers, concrete temperature control, and a ban on works in extreme weather. Timelines and budget are adjusted for the cold season.
The warranty for KOLEO’s works is set out in the contract (standard — multi-year for the structure; a specific term is fixed for each project). Manufacturer warranties apply to materials. Upon completion, you receive a full set of acts/certificates.
Yes. Ukraine — all regions. EU — we carry out works and/or design supervision by prior agreement and in line with local regulations. Logistics: we plan routes, mixer/pump access, the concrete delivery schedule, and agree “windows” with suppliers. KOLEO’s base address: 2zh Hrushevskoho St., Uzhhorod 88000, Ukraine.
At the design stage we agree on the zero-level marks, axis layout, embedded parts/reinforcement extensions for the grillage, utility connections (water/sewage/electricity), and sleeves. After the slab/strip reaches strength and passes geodetic verification, we plan delivery and the start of assembling the timber structures.
The concrete class and reinforcement diameters are determined by calculation (structural analysis) for your house and soil. Typically: a preparatory layer (compacted sand-crushed stone bedding), waterproofing, insulation (if needed), a working reinforcement mesh/cages, concrete of the appropriate class, expansion joints/extensions for vertical elements. The specific “layer cake” is fixed in the working design.
CONCLUSION
Building a private wooden house requires significant time and financial investment; in its construction it’s very important to take every detail into account, especially when arranging the foundation. After all, the reliability and durability of the house depend on it. If the choice of foundation for the house and its construction is made incorrectly, this will lead to a host of problems in the future that are very difficult to solve. There are various types of foundations in the construction world, but you shouldn’t choose based on advice from neighbours and friends – a consultation with a specialist in this field wouldn’t go amiss.
Consultation and choosing a foundation type
We build houses to standard and individual designs
Site visit
Take a look behind the scenes of the process of creating our client’s dream “CONSTRUCTION OF AN ECO HOUSE”
Want to see everything with your own eyes? We’ll take you on a real-time tour of our project. You’ll see with your own eyes how well-organised our construction process is.
Request a construction cost estimate
WHERE WE WORK
Ukraine. We work in all regions: Vinnytsia, Volyn, Dnipropetrovsk, Donetsk, Zhytomyr, Zakarpattia, Zaporizhzhia, Ivano-Frankivsk, Kyiv, Kirovohrad, Luhansk, Lviv, Mykolaiv, Odesa, Poltava, Rivne, Sumy, Ternopil, Kharkiv, Kherson, Khmelnytskyi, Cherkasy, Chernivtsi, Chernihiv regions and the city of Kyiv.
Key cities (examples): Kyiv, Lviv, Uzhhorod, Ivano-Frankivsk, Chernivtsi, Lutsk, Rivne, Ternopil, Khmelnytskyi, Zhytomyr, Vinnytsia, Cherkasy, Kropyvnytskyi, Poltava, Sumy, Chernihiv, Kharkiv, Dnipro, Zaporizhzhia, Kremenchuk, Kryvyi Rih, Mykolaiv, Odesa, Kherson, Bila Tserkva and others.
European Union. We also accept requests from EU countries: Poland, Slovakia, Hungary, Czechia, Germany, Austria, Romania, Bulgaria, Italy, Ireland, Belgium, Netherlands, Luxembourg, Spain, Portugal. We carry out design and estimates in line with local standards (Eurocode 5 and national annexes, local requirements for foundations, drainage and waterproofing).
HOUSE KIT EXPORT
If you’re interested in glulam timber construction but live outside Ukraine, find out about importing a timber house kit to:
“KOLEO” – WOODEN HOUSES
we also build
WILD-STYLE LOG HOUSE
These houses have a distinctive look that combines natural authenticity with a certain rugged charm.
CYLINDRICAL LOG HOUSES
Our company offers an affordable ready-made log house made of cylindrical logs - all houses stand out for attractive prices and high build quality.
PROFILED TIMBER HOUSES
Timber houses combine modern construction technology with a traditional look and eco-friendliness
GLULAM TIMBER HOUSES
Glulam timber is a unique building material that requires no constant upkeep
MODULAR HOUSES
A ready-made modular house saves one of the most valuable resources - time
A-FRAME HOUSE
A-FRAME houses are designed for people who value their freedom but still need a home of their own
SAUNAS
Building wooden bathhouses has become a popular trend in recent years.
BANYAS
The aesthetics of a wooden banya leaves no one indifferent - outward pleasure and wellness in one.
TEMPLES AND CHAPELS
Construction of religious buildings to standard and individual designs.
Read the answers to questions about construction that we’re frequently asked. If you still haven’t found the answer to your question, get in touch – I’ll try to help.