Manufacture & installation · Dénia
We manufacture and install custom PVC windows in Dénia with Kömmerling and Cortizo profiles. Free on-site survey and a fixed quote within 24 hours.
★★★★★ 4.9/5 on Google · 10-year warranty · In Alicante since 2010
Why people choose us in Dénia
Dénia has a very strong international client base (45% UK / Germany / Netherlands) and a unique protected natural setting: the Montgó-Marjal Pego-Oliva Natural Park. Each area calls for a different solution: premium villas in Las Rotas with a rocky cove, second-home flats in Las Marinas, chalets in Montgó with environmental regulations, and restored Bellaplana-stone village houses in the old town.
We do not resell: we cut Kömmerling and Salamander profiles in our workshop, 100 km from Dénia. No middlemen = 18-25% less than franchised chains in the Marina Alta.
We know the constraints of the Montgó-Marjal Pego-Oliva Natural Park: site-noise limits, the permitted facade colour palette (earth tones), the type of glazing bead allowed and the obligation to file prior notice with the managing authority.
In Dénia 32% of registered residents are foreign nationals (INE 2024), mostly British, German and Dutch. We work in Spanish, English, German and Dutch with a bilingual contract.
Dénia is a UNESCO Creative City of Gastronomy. We work with restaurants and harbour-side venues using purpose-built hospitality enclosures (toughened glass, anti-vandalism, folding openings).
Villas in Las Rotas and old-town houses in central Dénia are built with natural Bellaplana stone. We make bespoke frames for irregular lintels and preserve the original architectural character.
Ten-year warranty on the profile + 5 years on Roto NX hardware + 2 years on seals. Signed contract, not a leaflet. If condensation or leakage occurs, we return at no charge.
The Marina Alta microclimate
Dénia enjoys the sheltered microclimate of the Marina Alta: Mount Montgó (753 m) acts as a natural barrier against westerly winds, afternoon temperatures are +2 °C warmer than in Alicante and winters are noticeably milder. The area is actively used for viticulture thanks to the favourable conditions. But this brings specific challenges:
A correct window for Dénia should have Uw ≤ 1.6 W/m²K, class 4 air tightness, class 9A water tightness and low-e glass with argon to prevent condensation.
Local coverage
Free on-site survey within 48 h in these areas. If your property sits outside the list but still within the Marina Alta, we will travel out too — just ask, no obligation.
Your property type
Dénia has 4 very distinct property profiles: foreign-owned villas in Las Rotas, second-home flats in Las Marinas, environmentally restricted chalets in Montgó and restored village houses in the historic centre. Each calls for a different solution.
200-350 m², large plot with Mediterranean views, owners from the UK, Germany or the Netherlands, premium second home.
Typical problem
1980s-90s aluminium carpentry without thermal break, small panes that waste the view, condensation in the attic.
VentanaCosta solution
Full Cortizo COR 70 RPT aluminium package + HS panoramic slider for sea view + toughened solar-control glass. €16,000-32,000.
60-90 m² in 1980s buildings, sea-facing balcony, British owner who stays 3-6 months a year.
Typical problem
Aluminium without thermal break, summer beach noise, salinity attacking hardware, condensation during the 6 months the flat is closed.
VentanaCosta solution
Full Kömmerling 88 mm Passivhaus kit + 4/16/4 low-e climalit + living-room slider. €5,500-8,000.
150-280 m² on the protected mountain, panoramic bay views, variable wind, environmental restrictions.
Typical problem
Noise restrictions during the works, limited permitted facade colours, requirement for prior notice to the Natural Park authority.
VentanaCosta solution
Cortizo COR 70 aluminium lacquered in earth-tone RAL + HS slider + we handle the official Natural Park notification. €20,000-40,000.
Houses on c/ Loreto, c/ Diana, Baix la Mar — 19th-20th century, Bellaplana stone walls, irregular lintels.
Typical problem
Irregular openings (not rectangular), heritage-protection rules for the old town, rotting timber frames.
VentanaCosta solution
Bespoke PVC frames with wood-effect foil for irregular lintels + original mullion pattern + paperwork handled with the historic-centre town hall. €8,000-14,000.
Which material suits Dénia
In Dénia we recommend PVC for Las Marinas flats and old-town houses (best value plus Passivhaus performance), and aluminium for Las Rotas villas and Montgó chalets (large openings with sea views, Natural Park earth-tone colour rules).
| Criterion | PVC Kömmerling 88 Passivhaus | Aluminium Cortizo COR 70 RPT |
|---|---|---|
| Thermal insulation Uw | 0.8-1.0 W/m²K ✓✓✓ Passivhaus | 1.8-2.2 W/m²K ✓ |
| Salt resistance in Las Marinas | Excellent ✓✓✓ | Excellent with QUALIMARINE ✓✓✓ |
| Panoramic glazing for Las Rotas | Up to 2.4 m high ✓ | Up to 4 m high / HS 200 ✓✓✓ |
| Frames for Bellaplana stone | Wood-effect foil ✓✓✓ | Wood-effect lacquer ✓✓ |
| Indicative price €/m² | €500-750 | €650-1,200 |
| Montgó Natural Park rules | Earth-tone RAL approved ✓ | Earth-tone RAL approved ✓ |
| Recommended for | Las Marinas flats, old-town houses | Las Rotas villas, Montgó chalets, harbour hospitality |
Not sure? Request a free on-site survey and we will recommend the best fit for your home, no upcharge.
2026 prices — reference
Indicative prices including VAT and installation. The final figure depends on actual measurements, opening type, glazing choice and floor level. In Montgó we add a specific line for the Natural Park notification; in central Dénia, a line for adapting to irregular village-house openings.
Las Marinas flat
€5,500 — €8,000
Full Kömmerling 88 mm Passivhaus kit, 4/16/4 low-e climalit, Roto NX hardware, fly screens included.
Las Rotas villa with sea view
€16,000 — €32,000
Cortizo COR 70 aluminium + panoramic HS slider + toughened safety glass + SunGuard solar control.
Montgó Natural Park chalet
€20,000 — €40,000
Cortizo marine-lacquered aluminium + HS slider + we handle the official Montgó Natural Park notification.
All final quotes are fixed and in writing — no surprise "extras" once the works end. Free on-site survey across the whole Marina Alta.
What comes as standard in Dénia
Compliance and environmental rules
Every window leaves the workshop with CE marking and CTE documentation. Inside the Montgó-Marjal Pego-Oliva Natural Park we file prior notice and respect noise limits and approved RAL palette.
Declaration of Performance (DoP) per model and project. Without it, no window has been legal in Spain since 2014.
The windows we install in Dénia meet Uw ≤ 2.2 W/m²K (required) and most reach 0.9-1.2 W/m²K (class A+ Passivhaus).
We file prior works notice with the Conselleria de Medi Ambient + comply with working hours and the earth-tone RAL palette permitted by the managing authority.
On c/ Loreto, c/ Diana and Baix la Mar we handle Dénia town hall approval to preserve the original mullion pattern and village-house aesthetic.
Kömmerling 88 profiles certified by the German Passivhaus Institut: Uf 0.95 W/m²K, meeting the nearly-zero-energy building standard.
Team trained at Kömmerling Academy and Cortizo certified. Installation follows the manufacturer's protocol with batch-level traceability.
2026 grants available in Dénia
Recover between 20% and 80% of your investment by combining these grants. We prepare the technical documentation so you can file with IDAE, IRPF, IVACE or Dénia town hall.
Home-level renovation programme: energy demand savings >30% = 40-80% of cost subsidised. Open until 31/12/2026.
up to 80%Royal Decree-Law 19/2021: up to 60% tax deduction for energy-improvement works until 31/12/2026. €15,000 cap per home.
up to 60%Dénia town hall offers an IBI rebate for homes upgrading their energy rating + an extra rebate for restored historic-centre houses.
up to 25%/yrValencia Region energy-efficiency line for private homes and homeowners' associations: up to 35% extra, stackable with IDAE.
up to 35%Indicative information. Amounts and deadlines are subject to current regulations and budget availability.
Recent works in Dénia
Dutch family, primary residence. We replaced 1980s aluminium carpentry with COR 70 plus an HS 200 6 m slider and toughened SunGuard solar-control glass. Panoramic Mediterranean view.
British owner, second home. 78 m² flat with sea-facing balcony. Passivhaus kit: 88 mm PVC + low-e climalit + acoustic-glass living-room slider against summer beach noise.
Full restoration of the carpentry in a 1942 house. Irregular openings (Bellaplana stone lintels), bespoke PVC frames with wood-effect foil, original mullion pattern preserved for the town hall.
Property on the Montgó Natural Park slope. We handled the prior notification, lacquered in RAL 8004 (Park-approved earth tone), HS 200 4.5 m slider for views over the Dénia bay.
How we work in Dénia
You call / WhatsApp / send the form. We give you a 15-minute phone briefing in Spanish, English, German or Dutch: materials, timescales and indicative range.
Time: same day
Our surveyor travels to Dénia, measures to the millimetre, assesses orientation, the Montgó microclimate and any Natural Park or historic-centre specifics.
Time: 24-48 h
PDF detailing every window: profile, glass, hardware, RAL colour, price. Bilingual ES+EN/DE/NL if needed. Includes the Natural Park notification line if applicable.
Time: 24-72 h after survey
We cut and assemble in our own workshop in Alicante. Batch traceability and quality control before shipment to Dénia.
Time: 10-14 working days
Our own team (no subcontracting). Removal, fitting, sealing with Sika Boom foam and cleaning. Montgó Natural Park working hours respected where applicable.
Time: 1-3 days per home
Signed handover record, CE documentation, installation certificate, 10-year warranty and environmental dossier where applicable.
Time: same day as installation
The team that comes to your home
VentanaCosta does not subcontract: the surveyor who measures is on the payroll, and so is the installer. This matters because every Dénia area has its own quirks — Montgó Natural Park with environmental rules, the protected historic centre with mullion-pattern requirements, Las Rotas with sea views and rocky coves.
We have been installing across Alicante and the Marina Alta since 2010. Fourteen years, 3,200+ homes, zero court cases.
Surveyor
17 years measuring in the Marina Alta. Specialist in irregular village-house lintels.
EN/DE/NL liaison
English, German, Dutch, Spanish. Coordinates projects for UK, German and Dutch clients.
Lead installer
Kömmerling Academy + Cortizo certified. Team of 4, Natural Park experience.
Frequently asked questions
From quote sign-off to handover: 10-14 working days of manufacture + 1-3 days of installation per home. For a Las Rotas villa with large sliders, 3-5 weeks. If your chalet is in the Montgó Natural Park, add 1-2 weeks for the prior notification to the managing authority.
The Montgó-Marjal Pego-Oliva Natural Park requires: prior works notice to the Conselleria de Medi Ambient (10-15 days), respect for the permitted earth-tone RAL palette (browns, ochres, natural beiges — no bright white or loud colours) and limited working hours (08:00-18:00, no bank holidays). We handle all of this for you.
Yes, but you must respect the original aesthetic of Dénia's historic centre. We make PVC with wood-effect foil (chocolate, oak, walnut) that mimics traditional carpentry. We keep the original mullion pattern (cross-bars, divisions, etc.) so the town hall approves the refurbishment without issue.
For a second home shut for 6-9 months a year we recommend Kömmerling 88 mm Passivhaus with low-e argon glass: it eliminates condensation during long closures, resists Las Marinas salinity and blocks beach noise when you come in July-August. €5,500-8,000 for an average flat.
Yes. Peter, our international coordinator, is a native Dutch speaker and also speaks English, German and Spanish. We can send a bilingual quote (NL+ES or EN+ES) and the signed contract in both languages. All site communications can be in Dutch.
Yes. We provide: itemised invoice by chapters, before-and-after energy certificate where required, installer's declaration, product datasheets and CE marking. That gives you everything for NextGen IDAE, IRPF, the Generalitat and the Dénia IBI rebate (including the extra rebate for restored historic-centre houses).
We accept bank transfer (including SEPA from the UK, Netherlands, Germany, Belgium), card and Bizum. Standard payment terms: 50% on signing and 50% on installation completion (not before). For larger Las Rotas or Montgó projects we can split into 3 milestones.
We dismantle them, remove them and take them to an authorised waste facility in Dénia / Ondara. Removal cost is included in the quote — it does not appear as an "extra" at the end. If your homeowners' association needs a waste-management certificate, we provide it.
Also in Dénia
When you refurbish windows in Dénia, it often makes sense to handle the rest of the envelope at the same time: terrace with harbour or Montgó view, partitions, pergolas for the pool or wine area. Same on-site survey, same fixed quote.
We also work in
If you live or own property in a nearby Marina Alta or Safor town, we will travel out. Same free survey and quote within 24-72 h.
Free on-site survey. Reply within 24 hours.
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Alicante · Elche · San Vicente del Raspeig · Mutxamel · El Campello · Villajoyosa · Benidorm · Altea · Calpe · Moraira · Jávea · Denia · Crevillente · Santa Pola · Guardamar del Segura · Torrevieja · Orihuela · Pilar de la Horadada · Almoradí · Murcia · Cartagena · San Pedro del Pinatar