Terrace Enclosures in Alicante
Complete enclosure of terraces and porches. Aluminium + double glazing. Gain extra usable space year-round.
★★★★★ 4.9/5 on Google · Official Kömmerling Distributor · In Alicante since 2010
Why customers choose us for terrace enclosures
In Costa Blanca and Murcia, 1 in 2 homes has an underused terrace, balcony or porch. We turn that wasted space into a usable room year-round with Lumon, Cortizo and Kömmerling systems. Our own factory, multilingual team, written 10-year warranty.
850 m² workshop, 30 km from the average customer. We cut Cortizo and Kömmerling profiles without intermediaries: 18-25% savings vs franchise chains.
We work with the 3 top-tier European manufacturers: Lumon glass curtains (Finnish), Cortizo Cor 60/Cor Vision/HS200 sliding doors (Spanish) and Kömmerling PVC (German).
47% of Costa Blanca residents are foreign (INE 2024): we serve in Spanish, English, Russian and German. Quote, contract and warranty in your language.
We handle the standard application for owners' meetings. Over 40 communities completed in Habaneras, La Veleta, Punta Prima, Benidorm centre and Calpe beach.
Terrace enclosure with low-e glass = thermal envelope upgrade. Refundable up to 60% via IRPF income tax and 40-80% via NextGen IDAE. We handle all paperwork.
10-year warranty on the profile + 5 years on hardware + 2 years on sealant. Signed contract, not a brochure. If you get condensation, leaks or misalignment, we come back at no cost.
Systems available
We don't sell a single system — we recommend what fits your terrace, budget and condo rules. Here's what we install and when to choose each one.
Lumon Visión / Lumon Aero system: 10-12 mm tempered glass with no vertical frames. 360° view. Folds and slides for full opening.
from €450/m²
Balconies, penthouses, communities with strict facade rules
Cortizo Cor 60 Folding Sash: 3-7 sashes that fold accordion-style to one side. 85% opening of the bay. Class 4 thermally-broken frame.
from €620/m²
Mid-large terraces 8-20 m², villas, chalets
Cortizo COR HS200 with double low-e glazing. Sashes up to 400 kg lift and slide. Thermal insulation Uw 1.4 W/m²K.
from €850/m²
Living-room-terrace by pool, large bays >3 m
Cortizo Cor Vision: visible frame just 25 mm. Tempered double glazing 6+6/16/4 low-e. Premium contemporary villa aesthetic.
from €720/m²
Design villas, terraces with sea views
Kömmerling 76 AD PVC slider: 2-4 sashes, 70-90 mm frames, climalit low-e glass. Excellent value for money.
from €380/m²
80s-90s apartments, second homes
Book a free site visit and our technician recommends the right system based on orientation, budget and your community's rules.
Book free visit →Your type of terrace
Enclosing a 5 m² balcony on the 8th floor in Benidorm is not the same as a 35 m² terrace at a Calpe villa. These are the 5 most common typologies and what we recommend.
Standard apartment balcony, 1.5-2 m deep, 3-4 m wide. Constraint: uniform aesthetics with the community facade.
Recommended system
Lumon Visión glass curtains (no visible frames). Complies with facade rules in 95% of communities.
Investment
€1,800 – €3,200 (VAT and installation included).
Wraparound penthouse terrace with railing. Opportunity to gain a room or extended living room. Strong levante wind.
Recommended system
Cortizo Cor 60 folding slider + panoramic Cor Vision fixed glazing. Double low-e glass.
Investment
€12,000 – €22,000 (VAT and installation included).
Townhouse garden-terrace, 12-25 m², single level. Typically a BBQ / outdoor dining area.
Recommended system
Cortizo HS 200 lift-and-slide with low-e glass. Airtight closure for winter use.
Investment
€7,500 – €14,000 (VAT and installation included).
Standalone villa, terrace next to pool 25-50 m². Aesthetics matter, panoramic views to preserve.
Recommended system
Cor Vision 25 mm frames + HS 200 sliding section. Safety tempered glass 6+6.4. QUALIMARINE anti-salt lacquer.
Investment
€15,000 – €28,000 (VAT and installation included).
Ground floor, covered porch 10-18 m² + garden. Gain usable room + intrusion protection.
Recommended system
Kömmerling 76 AD PVC slider with multipoint lock + P4A safety laminated glass.
Investment
€5,500 – €10,000 (VAT and installation included).
Which system suits you
The 2 most demanded options in Costa Blanca. There's no "best": it depends on use (season, noise, budget). Here's our comparison after 14 years installing both.
| Criterion | Lumon glass curtains | Cortizo aluminium slider |
|---|---|---|
| Price €/m² | €450-650 | €620-1,100 |
| Aesthetics (visible frames) | No vertical frames ✓✓✓ | 45-90 mm frames ✓ |
| Thermal insulation Uw | 3.5-4.5 W/m²K ✓ | 1.4-2.2 W/m²K ✓✓✓ |
| Acoustic insulation Rw | 25-28 dB ✓ | 33-42 dB ✓✓✓ |
| Natural ventilation | 100% opening (fold) ✓✓✓ | 50-85% opening ✓✓ |
| Panoramic view | 360° unobstructed ✓✓✓ | View with vertical frames ✓ |
| Annual maintenance | Glass cleaning ✓✓✓ | Hardware lubrication 1x/year ✓✓ |
| Coastal durability | 40+ years | 50+ years with QUALIMARINE |
Summary: glass curtains for spring-summer use balconies with sea views; aluminium slider for year-round terraces with thermal/acoustic insulation.
How we work
Call, WhatsApp or fill out the form. We orient you in 15 min: recommended system, price range, deadlines.
Time: same day
Our technician visits your terrace, measures to the millimetre, assesses orientation, wind, condo rules and any prep work needed.
Time: 24-48 h
Detailed PDF: system, profile, glass, hardware, colour, installation and certificates. Fixed price, no surprise "extras" later.
Time: 24-72 h after visit
Cut and assembled in our own workshop in Alicante. Batch traceability, QC before shipment to site.
Time: 10-18 working days
Our own team (not subcontracted). Anchoring, sealing with Sika Boom foam + neutral silicone, end-of-work cleanup included.
Time: 1-3 days per terrace
Signed handover document, CE marking, Declaration of Performance, installer certificate and 10-year warranty. Full dossier on paper + PDF.
Time: same day as installation
2026 prices — reference
Reference prices with VAT, installation, sealing, debris removal and certificates included. Final figure depends on measurements, system and floor. These are real ranges from projects closed in 2025-2026.
Small balcony
€1,800 — €2,800
Lumon Visión glass curtains, 8-10 mm tempered glass, upper and lower aluminium tracks, 1-day installation.
Mid-size terrace
€3,500 — €6,500
Cortizo Cor 60 folding slider + double low-e glass + optional fixed section. Year-round closure.
Large terrace
€8,000 — €18,000
Panoramic Cortizo Cor Vision + HS 200 lift-and-slide + safety low-e glass 6+6.4.
Quotes are fixed and in writing — no surprises at the end. Free site visit throughout Costa Blanca and Murcia.
What comes as standard
Regulations and permits
Enclosing a terrace modifies the building's exterior look and increases usable floor area. These are the permits and certificates you'll need — we handle them with you.
Spain's Building Code zone B3 requires Uw ≤ 2.2 W/m²K for openings. Our sliding systems clear this with margin and unlock subsidy eligibility.
Every enclosure leaves the workshop with CE marking and a Declaration of Performance per EU Regulation 305/2011. Mandatory since 2014.
Most communities require board approval when facade is modified. We prepare technical memo + photomontage to present.
Alicante, Torrevieja, Benidorm town halls require a license (€40-120). We file the application and technical project if over 25 m².
If your building has an active ITE, the enclosure must be recorded at the next inspection. We provide a technical sheet for the architect.
Enclosing your terrace upgrades the energy rating by 1-2 letters (D-E to B-C). Required for IDAE subsidies and IBI tax discounts.
Active 2026 grants
Combining these grants you recover between 30% and 80% of the investment. We handle the technical paperwork (itemised invoice, before/after energy certificate, installer declaration) — you just present it.
National energy retrofit program: if the enclosure + existing windows improve heating/cooling demand by >30% → subsidy 40-80%. Open until 31/12/2026.
up to 80%Royal Decree-law 19/2021: up to 60% IRPF tax credit for works that reduce non-renewable primary energy consumption. €15,000 limit per home until 31/12/2026.
up to 60%Alicante, Torrevieja, Benidorm and Murcia town halls discount IBI 25-50% for 3-5 years for homes that upgrade energy rating with certified works.
up to 50%/yearIVACE energy-efficiency line for private homes and communities in Valencia Region: up to 35% additional, compatible with IDAE and IRPF.
up to 35%Indicative information. Amounts and deadlines subject to current regulation and budget availability.
Recent projects
Swedish owner, second home. Wanted minimalist aesthetics to preserve the harbour view. Condo approval on 1st vote with photomontage.
British resident family. Wanted to use the terrace in winter with sea view. Mixed solution: folding slider + panoramic fixed glazing on the side.
Front-line home with Peñón de Ifach view. 25 mm frames + 6+6.4 safety tempered glass. QUALIMARINE anti-salt lacquer.
48-home community voted to enclose all balconies with uniform aesthetics. 18% volume discount, staggered 4-week manufacturing.
Geographic coverage
Free site visit in under 48 h throughout Costa Blanca and Murcia. If your town isn't listed but is in the area, call us — we typically cover from Cartagena in the south to Dénia in the north.
The team and the factory
VentanaCosta doesn't subcontract: the technician who measures is in-house, and so is the installer. This matters because every terrace has its own quirks — strict condo rules, levante wind, municipal regulations, tricky access.
Installing in Costa Blanca and Murcia since 2010. 14 years, +3,200 projects, 0 lawsuits.
Technical surveyor
18 years measuring terraces in Costa Blanca. Specialist in large sliders.
Multilingual liaison
Spanish, English, Russian and German. Coordinates jobs with foreign clients.
Install team lead
Cortizo + Lumon Academy certified. 4-person in-house install crew.
Real reviews
Elena Petrova
Torrevieja · March 2025
★★★★★
"We enclosed a 6 m² balcony with Lumon Visión. Looks like new, no frames, harbour view preserved. They served in Russian, fixed price with no surprises. Andrei coordinated everything perfectly."
John Martin
Calpe · June 2025
★★★★★
"Pool terrace enclosed with Cortizo Cor Vision. Professional team, 3-day installation, cleanup included. Immediate noticeable difference in temperature and noise. 10-year warranty in writing. 100% recommend."
Carmen Ruiz
Benidorm · October 2025
★★★★★
"Penthouse with wraparound 35 m² terrace. Manuel measured to the millimetre and proposed mixed folding slider + panoramic fixed glazing. Handled condo permit and town hall license. Excellent service."
Frequently asked questions
Depends on size and system: small balcony 4-6 m² with glass curtains €1,800-2,800; medium terrace 10-15 m² with folding slider €3,500-6,500; large terrace 20-40 m² with lift-and-slide + panoramic fixed glass €8,000-18,000. All prices include VAT, installation, sealing and certificates.
Yes, in the vast majority of communities. Enclosing a terrace modifies the facade and requires a board vote (3/5 majority per Spanish Horizontal Property Law art. 17). We prepare a technical memo + photomontage + plan for your administrator to present. Approved 1st-2nd meeting in 95% of cases.
Lumon = frameless glass curtains (minimalist aesthetics, 360° view, light thermal insulation). Cortizo = aluminium sliders with thermally-broken profiles (strong thermal/acoustic insulation, pricier, visible frames 25-90 mm). Lumon for spring-summer-use balconies; Cortizo for year-round terraces.
Yes, if the enclosure helps reduce annual energy demand by >30%. To qualify you must submit a before/after energy certificate. Refund 40-80% based on owner's income. We handle all technical paperwork.
Yes, depending on the system and glass. Lumon glass curtains: 25-28 dB reduction. Cortizo aluminium slider + double glass: 33 dB. Slider + laminated acoustic glass 6/16/3+3: 42 dB (eliminates almost all noise). For very noisy areas we always recommend laminated acoustic glass.
10-year warranty on the profile + 5 years on Roto / Cortizo hardware + 2 years on perimeter sealant. Signed contract, not a brochure. If you get condensation, leaks or misalignment, we come back at no cost. We also cover glass against spontaneous tempering breakage.
Site visit 24-48 h + fixed quote 24-72 h after visit + manufacturing 10-18 working days (depending on system) + installation 1-3 days. Total: 3-5 weeks from first contact. If a municipal license is needed, add 2-4 extra weeks.
Not by default — they're optional (€80-160 per slider unit, €220-380 for a pleated screen for large bays). Recommended if you live near a damp area (Torrevieja saltworks, Mar Menor) or have a pool nearby. We list them as a separate line in the quote.
We also install
If you enclose a terrace, it often makes sense to address the rest of the envelope at the same time: windows, partitions, pergolas. Same site visit, same fixed quote.
Free on-site visit throughout Costa Blanca and Murcia.
Or contact us directly via:
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