Serving Tallinn and Harju County
Tallinn's #1 terrace builder
Terrassiehitus Tallinn builds timber terraces for homes across Tallinn and Harju County. We use 28 mm decking in treated pine, Siberian larch or thermowood, choosing the timber for the site's moisture and sun exposure. The boards are fixed to joists supported by screw piles or concrete blocks. We size the structure for winter snow as well as the weight of people using the terrace.
Site surveys and quotes are free in Tallinn and Harju County. Stock materials are invoiced with the work and paid for after handover. Construction starts no later than the 14th working day after an order is confirmed. Treated pine is held in stock; larch and thermowood are ordered from the supplier.
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Our timber terrace work covers material selection, construction and extensions. By the end of 2025, our work log recorded 431 jobs: 297 pine terraces, 81 larch terraces, 31 thermowood terraces and 22 extensions, covering 12,160 m² of decking.
We use pressure-treated pine rated to protection class AB. The boards are still swollen with moisture when installed, so we initially leave 3 mm gaps rather than the final 5 mm. As the timber dries during its first season, the gaps widen.
We order boards in batches from the sawmill so one terrace uses timber from the same drying batch, giving the decking a more consistent colour.
Siberian larch is an option for customers who prefer decking without chemical pressure treatment. Its heartwood is naturally resistant to moisture and fungal damage. Its tannins can react with unsuitable fixings and leave dark stains around screws.
We use A4 (316) stainless steel screws for larch rather than the more common A2 (304) grade, to resist the combination of tannins and coastal salt air without corrosion or dark marks.
Thermowood is heat-treated at 185°C without chemicals. It turns brown and moves less with moisture, but the treatment also makes the fibres more brittle. Driving screws without pre-drilling can split board ends.
We pre-drill each thermowood fixing 5 cm from the board end with a bit narrower than the screw, preventing the end cracks that are less common in tougher treated pine.
An extension adds new decking beside the existing terrace on its own screw piles or blocks. The old and new foundations must not share a load-bearing beam end.
We leave a 10 mm expansion gap between old and new decking, hidden beneath a cover board. Timber structures built at different times move differently with moisture; a rigid joint could crack in the first winter.
Prices depend on timber species, foundation and board direction. Site surveys and quotes are free in Tallinn and Harju County; travel beyond Harju County costs €0.87 per kilometre.
| Service | Price |
|---|---|
| Pressure-treated pine terrace construction | from €108/m² |
| Larch terrace construction | from €140/m² |
| Thermowood terrace construction | from €210/m² |
| Extending an existing terrace | from €95/m² |
| Pressure-treated timber railing installation | from €107/linear m |
| Strengthening the substructure during an extension | from €35/m² |
| Travel within Tallinn and Harju County | 0 € |
The following factors affect the price the most:
A 32 m² timber terrace on screw piles takes four working days: piles and beams on day one, joists and decking on days two and three, then edge boards, steps and cleanup on day four. Our average pine terrace is 28.1 m² and takes 3.6 working days on site.
A diagonal 45° decking pattern adds one working day because every board needs angled end cuts and the closer joints require more fixings per square metre.
Treated pine is held in stock and can be scheduled once the quote is confirmed. Made-to-order larch and thermowood arrive from the supplier in five working days, adding delivery time to those projects.
Our construction season runs from April to October because screw piles cannot be driven into frozen ground and concrete blocks may settle unevenly in winter. We reply on the same working day and begin a confirmed timber terrace no later than the 14th working day.
Owner: Peeter E., two-story log house. Plot: Near Pirita Economic High School, Pirita. Job number: 1 214.
1. Survey and material choice: the crew leader measured the site's slope and door threshold. The decking level was 51 cm above ground, and the customer chose thermowood heat-treated at 185°C, delivered by the supplier in five working days.
2. Foundation and frame: all 15 screw piles reached a final torque of 1,000 Nm and were recorded individually. We levelled the beams in both directions before fitting the joists.
3. Decking and handover: we pre-drilled each fixing hole 5 cm from the end of the 28 mm thermowood boards and protected every cut edge before installation. Two steps, each with a 17 cm rise and 28 cm tread, lead to the garden. The customer received written care instructions.
Construction price: thermowood terrace construction 28 m² × €210 = €5,880; screw pile foundation 15 piles × €55 = €825; terrace stairs 2 steps × €65 = €130. The amount of €6,835 for the lines includes 24% VAT.
Construction time: five working days for thermowood delivery, then four on site in May 2024: piles and beams, two days of joists and decking, then edge boards, stairs and cleanup.
Finished terrace: There are no end cracks on the 28 square metres of the thermowood board.
Three steps from enquiry to finished terrace.
On site, we measure the slope, test the soil with a hand auger and discuss timber options. The quote itemises the foundation, joists, decking area and edge boards. For larch or thermowood, the supplier invoices the board price shown in the quote.
We install screw piles using a torque meter and record each final reading. Beams are fixed to pile heads or blocks and checked for level in both directions before the joists go on; an uneven beam would leave the finished decking uneven.
We fix the decking using the chosen method and treat cut ends before fitting each board. At handover, you receive written care instructions. The three-year written warranty for the load-bearing structure is listed separately from the decking in the contract.
The spacing of the planks, the method of fastening and the moisture content of the wood will determine how long the terrace will last and how much maintenance it will require.
For straight decking, boards cross the joists at right angles. Joists are spaced 40 cm centre to centre, giving each board at least four supports along its length. With a 45° diagonal pattern, the span between supports grows, so we reduce joist spacing to 30 cm to prevent sagging.
We pre-drill any fixing within 2 cm of a treated pine board's end, where screw threads could split the end grain. Screw heads sit flush with the surface; a recessed hole would collect water and decay sooner than the surrounding board.
Outdoors in Tallinn, decking settles at around 17% moisture content, while newly treated boards may be at 30% when fitted. We therefore leave narrower initial gaps, which widen as the boards dry to their outdoor equilibrium during the first season.
A 30 m² treated pine terrace starts at €3,240, based on €108/m². The same size in larch starts at €4,200, or €6,300 in thermowood. Our average larch terrace is 34.1 m², starting at €4,774.
Treated pine is the lowest-cost option and needs periodic oiling and protective treatment. Larch is naturally moisture-resistant and needs A4 stainless screws because of its tannins. Thermowood is the most dimensionally stable, but its board ends can split around fixing holes that have not been pre-drilled.
Our construction season runs from April to October: screw piles cannot be installed in frozen ground, and blocks can settle unevenly in winter. For orders confirmed in winter, the 14-working-day start period begins on 1 April.
We bag offcuts and packaging separately on site, then empty each bag into the appropriate container at our Peetri warehouse.
The listed prices include materials and labour. Stock materials from our Peetri warehouse, such as treated pine, screw piles and fixings, appear on our invoice, payable by bank transfer after handover. For made-to-order larch and thermowood, the supplier invoices you directly at the price shown in our quote.
Timber choice and care matter. Treated pine needs regular oiling and protective treatment; larch and thermowood are naturally more durable. The load-bearing structure has a three-year written warranty supported by pile records.
Under the Building Code, a terrace no more than 1 m above ground needs neither a building notice nor a permit. For a higher terrace, we submit a building notice to the local authority. See the shelter page for the rules on structures above a terrace.
Across Tallinn and Harju County, including gardens in Nõmme and Pirita, Kalamaja courtyards, Rae Parish, Viimsi, Saue, Keila and Maardu.
Call +372 XXXX XXXX to arrange a timber terrace survey, or send the proposed dimensions and a site photo through the form below. On the free visit, the crew leader measures the site's slope and the height of the door threshold to plan the decking level and steps.