Why people choose us in Cartagena

Specialists in Modernist heritage and extreme salinity

Cartagena is in fact three very different cities: the Historic Centre declared Conjunto Histórico-Artístico with listed Modernist buildings (Casa Maestre, Casa Cervantes, Gran Hotel), the coastal strip with extreme salinity from both the Mar Menor and the Mediterranean, and the residential ensanche. We apply a tailored solution for each.

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Heritage Office experience

We have restored carpentry on listed buildings of Cartagena's Old Town. We know the Municipal Heritage Office protocol: technical report, photo-montage, approved RAL colours and traditional mullion patterns.

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La Manga extreme-salinity protection

La Manga del Mar Menor takes salt from both sides (Mar Menor + Mediterranean). We use Cortizo COR 70 aluminium with certified QUALIMARINE lacquering and stainless Roto NX hardware — they last 25+ years without rusting.

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Our own factory in Alicante

We cut Kömmerling and Cortizo profiles in our own workshop (110 km to Cartagena via AP-7). No middlemen = 15-22% less than franchised chains buying from a Madrid catalogue.

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We know the Naval Base area

Some districts close to the Naval Base have limits on height, reflective colours and glare towards the military harbour. We advise on non-specular lacquers and applicable rules.

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Region of Murcia grants

We file NextGen IDAE Region of Murcia (up to 80%), 60% IRPF deduction, INFO grants and the IBI rebate from Cartagena Town Hall for energy refurbishment.

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10-year written warranty

Ten-year warranty on the profile + 5 years on Roto NX hardware + 2 years on seals. Signed contract. If condensation, rust or leakage occurs, we return to Cartagena at no charge.

The climate rules

Why 20-year-old windows fail in Cartagena

Cartagena records 320 days of sun a year, average 75% humidity (very high because of the harbour), prevailing NE winds (Tramontana) and extreme salinity from the dual Mar Menor + Mediterranean exposure. This combination does three things to poorly specified windows:

→Salinity rusts hardware and unlacquered aluminium: especially in La Manga, where the air carries salt from both sides. Rusted hardware stops closing properly within 3-4 years. We use stainless Roto NX and QUALIMARINE lacquering.
→Harbour humidity rots timber and cracks gaskets: with 75% average humidity, traditional timber in the Centre swells and warps. Old EPDM gaskets craze. Modern uPVC with twin seals solves the problem for good.
→NE Tramontana shakes single-pane glass: harbour wind hits facades with 70-95 km/h gusts in winter. 4 mm panes whistle and vibrate. We swap them for 4/16/4 climalit with argon or triple-glazing depending on orientation.
→Intense UV degrades cheap Chinese uPVC: they lose colour in 5-7 years and become brittle. German Kömmerling (class S to UNE EN 12608) lasts 40+ years keeping its whiteness and mechanical strength.

Cartagena climate data (AEMET)

Sunny days per year: 320
Average summer temperature: 26-32 °C
Average winter temperature: 11-17 °C
Average relative humidity: 75% (harbour)
Salinity: High (extreme in La Manga)
Prevailing wind: Tramontana NE 70-95 km/h
Annual rainfall: 270 mm (cold-drop in September)
CTE climate zone: B3 (warm-warm)

A correct window for Cartagena should have Uw ≤ 1.6 W/m²K, QUALIMARINE lacquering near the coast and class 4 air tightness.

Local coverage

Areas of Cartagena where we install

Free on-site survey within 48 h across the Cartagena municipal area and the Mar Menor surroundings. La Manga logistics are tougher (a single access road): this is reflected in the quote but pays off in final quality.

Historic CentreConjunto Histórico-Artístico, listed facades

Old TownModernist Casa Maestre, Casa Cervantes

Ensanche1970s-90s 6-10-storey housing blocks

Los DoloresResidential district with blocks to refurbish

Barrio PeralRestored traditional working-class housing

San AntónResidential outskirt near harbour

La AljorraResidential and industrial outskirt

Cabo de PalosCoastal bungalows, second homes

La MangaTourist flats, extreme salinity

Playa HondaMar Menor urbanisation, chalets

Sta. RiberaSantiago de la Ribera (nearby), villas

El AlgarInland village with traditional farmhouses

Your property type

Solutions by property type in Cartagena

Cartagena combines unique heritage (the Cartagena Modernism) with residential coast and inland districts. These are the 4 most common property types and our proposal for each.

Modernist building in the Historic Centre

80-130 m² flat in a listed building (Calle Mayor, Plaza San Sebastián, Trovero Marín). Facade protected by Heritage Office.

Typical problem

You cannot change the exterior look — original timber or aluminium very degraded, infiltrated damp, cold in winter.

VentanaCosta solution

Restoration + wood-effect uPVC in a Heritage-approved colour + traditional mullion pattern. €6,000-12,000.

High-rise flat in La Manga

60-90 m² tourist flat in a 10-20-storey tower with dual exposure to Mar Menor + Mediterranean. Extreme salinity.

Typical problem

Aluminium rusted within 3-4 years, hardware seized by salt, degraded shutters, glass pitted by sand.

VentanaCosta solution

Cortizo COR 70 aluminium with QUALIMARINE lacquering + stainless hardware + toughened safety glass. €6,500-9,000 (+25% La Manga logistics).

Mar Menor / Playa Honda villa

180-280 m² detached chalet, beachfront on the Mar Menor, large openings facing the water.

Typical problem

Large 3-5 m openings on old sliders that get heavy and jam, salt attacks 1990s lacquering, summer tourist noise.

VentanaCosta solution

Cortizo Cor Vision frameless aluminium + HS 200 lift-and-slide 5 m + 6+6.4 toughened glass. €16,000-30,000.

Ensanche / Los Dolores community

40-150-flat 1970s-90s blocks. Block-wide refurbishment approved by owners' meeting.

Typical problem

Aluminium without thermal break, patchy facade from individual refurbishments, inflated quotes from chains.

VentanaCosta solution

Single Kömmerling 70 order with a 14-20% discount, staged manufacture by stairwell, fixed price per type A/B/C flat.

Which material suits Cartagena

PVC or aluminium in Cartagena: which to choose

In Cartagena the choice depends a lot on distance to the sea. PVC works well in the Ensanche and inland districts; QUALIMARINE aluminium rules in La Manga, Cabo de Palos and beachfront Mar Menor. This table sums up our recommendation after 14 years on the ground.

Criterion	PVC Kömmerling 70 AD	Aluminium Cortizo COR 70 + QUALIMARINE
Thermal insulation Uw	1.1-1.3 W/m²K ✓✓✓	1.8-2.2 W/m²K ✓
Salt resistance in La Manga	Good ✓✓ (no rust-prone hardware)	Excellent with QUALIMARINE ✓✓✓
Large glazing (>2 m²)	Up to 2.4 m high ✓	Up to 3.5 m high ✓✓✓
Historic Centre (Heritage)	Wood-effect foil, approved RAL ✓✓✓	Lacquer, approved RAL ✓✓
Indicative price €/m²	€450-700	€650-1,200 (with QUALIMARINE)
Lifespan beachfront Mar Menor	30+ years	50+ years
Recommended for	Centre, Ensanche, Los Dolores, inland main residence	La Manga, Cabo de Palos, Playa Honda, Mar Menor villas

Not sure? Request a free on-site survey in Cartagena and we will recommend the best fit for your area and exposure — at no extra cost.

2026 prices — reference

How much it costs to replace windows in Cartagena

Indicative prices including VAT and installation. The final figure depends on actual measurements, opening type, glazing choice, floor and area (La Manga +25% logistics). These are the ranges of our closed projects in 2025-2026.

Ensanche flat

70-100 m² · 6-9 windows

€5,000 — €7,000

White Kömmerling 70 AD, 4/16/4 low-e climalit, Roto NX hardware, fly screens included.

· Removal and disposal of old windows
· Perimeter sealing with Sika foam
· End-of-works cleaning

Best seller in La Manga

La Manga flat

60-90 m² · dual salt exposure

€6,500 — €9,000

Cortizo COR 70 aluminium with QUALIMARINE lacquering + stainless hardware + toughened glass. +25% logistics.

· Certified QUALIMARINE marine lacquering
· Stainless Roto NX hardware
· Access by tower / lift

Mar Menor beachfront villa

180-280 m² · full enclosure

€16,000 — €30,000

Cortizo COR 70 aluminium + frameless Cor Vision + HS 200 lift-and-slide 5 m with sea view.

· QUALIMARINE lacquering, 25+ years lifespan
· Optional Somfy motorised opening
· 6+6.4 toughened safety glass

All final quotes are fixed and in writing — no surprise "extras" once the works end. Free on-site survey in Cartagena and La Manga.

What comes as standard

Standard technical specifications for Cartagena

Cortizo COR 70 aluminium + QUALIMARINE

Frame depth: 70 mm
Thermal break: 30 mm polyamide
Marine lacquering: Certified QUALIMARINE
Frame Uf insulation: 2.0 W/m²K
Air tightness: Class 4 (UNE EN 12207)
Salt resistance: 25+ years without rusting
Wind resistance: Class C5

Standard 4/16/4 climalit glass

Composition: Float 4 mm + 16 mm argon + low-e 4 mm
Ug transmittance: 1.0 W/m²K
Solar factor g: 0.52
Acoustic insulation Rw: 33 dB (upgradable to 42 dB)
Light transmission: 79%
Toughened/safety: Recommended in La Manga
Glass warranty: 10 years (no condensation)

Regulatory compliance

Regulations, certificates and official warranties

Every window leaves the workshop with CE marking and the CTE documentation. For Cartagena's Historic Centre we also handle Heritage Office paperwork. We deliver a digital + paper dossier for your ITE, IRPF return or IDAE grant.

CE marking (EU Regulation 305/2011)

Declaration of Performance (DoP) per model and project. Without it, no window has been legal in Spain since 2014.

CTE DB-HE 2019 zone B3

The windows we install in Cartagena meet Uw ≤ 2.2 W/m²K (required) and most reach 1.1-1.4 W/m²K (class A+).

QUALIMARINE (marine lacquering)

QUALICOAT certification specific for high-salinity environments: additional pretreatment and coating thickness ≥ 60 microns.

Cartagena Heritage Office

We handle the technical report, photo-montage and application to the Municipal Heritage Office for works in the Conjunto Histórico-Artístico.

Asefave 10-year warranty

Spanish Association of Lightweight Facade and Window Manufacturers: industry backing for the delivered product.

Authorised installer certificate

Team trained at Kömmerling Academy and Cortizo certified. Installation follows the manufacturer's protocol.

2026 grants available

Subsidies for replacing windows in Cartagena

Recover between 20% and 80% of your investment by combining these regional, state and municipal grants. We prepare the technical paperwork (itemised invoice, before-and-after energy certificate, installer's declaration) so you can file it yourself.

NextGen IDAE Murcia

Home-level renovation programme managed by the Regional Government of Murcia: energy demand savings >30% = 40-80% of cost subsidised. Open until 31/12/2026.

up to 80%

IRPF tax relief

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%

INFO Murcia grant

Murcia Region Development Institute: dedicated energy-efficiency line for private homes and homeowners' associations. Stackable with IDAE.

up to 30%

Cartagena IBI rebate

Cartagena Town Hall rebates IBI for up to 5 years for homes improving their energy rating with certified works. Special rate inside the Conjunto Histórico.

up to 25%/yr

Indicative information. Amounts and deadlines are subject to current regulations and budget availability from the Regional and Town Hall authorities.

Recent works in Cartagena

A few projects completed in the last 18 months

Modernist building · Historic Centre

Heritage-friendly restoration in a listed building

2nd-floor flat in a listed building on Calle Mayor. Technical report + photo-montage approved by the Heritage Office. Wood-effect uPVC with traditional mullion pattern, low-e glass. Permits in 32 days.

Total timescale: 52 days (with permits)
Investment: €9,450 (VAT incl.)
IRPF subsidy: €3,780 (40%)

Flat · La Manga 12th floor

Aluminium carpentry + QUALIMARINE lacquering

Tourist flat in a tower with dual Mar Menor + Mediterranean exposure. Cortizo COR 70 aluminium with certified QUALIMARINE marine lacquering, stainless Roto NX hardware, toughened safety glass. Tower logistics +25%.

Total timescale: 22 days
Investment: €8,640 (VAT incl.)
Salinity warranty: 25 years cert.

Villa · Mar Menor

5 m slider with sea view + full enclosure

Beachfront villa in Playa Honda with salinity problems on existing hardware. Cortizo COR 70 aluminium with QUALIMARINE + Cor Vision in living room with HS 200 lift-and-slide 5 m + 6+6.4 toughened safety glass.

Total timescale: 31 days
Investment: €26,500 (VAT incl.)
Energy savings: 39% (CEE cert.)

Community · Ensanche

64 flats — Kömmerling 70 block-wide refurbishment

1980s block in the Ensanche with original non-thermal-break aluminium. Full refurbishment approved by the owners' meeting. Staged manufacture in 3 phases, installation by stairwell. 17% volume discount, single project certificate.

Total timescale: 13 weeks
Windows installed: 416 units
Model: White Kömmerling 70 AD

See full project gallery →

How we work

Step-by-step process, transparent timescales

01

Contact and guidance

You call / WhatsApp / send the form. We give you a 15-minute phone briefing: materials, timescales and an indicative range for Cartagena.

Time: same day

02

Free on-site survey

Our surveyor travels to Cartagena (or La Manga), measures to the millimetre, assesses salt exposure and any property quirks.

Time: 24-48 h

03

Fixed quote

PDF detailing every window: profile, QUALIMARINE lacquering where needed, glass, hardware, colour, price. No extras.

Time: 24-72 h after survey

04

Bespoke manufacture

We cut and assemble in our own workshop in Alicante. Batch traceability and quality control before shipment to Cartagena.

Time: 10-14 working days

05

On-site installation

Our own team (no subcontracting). Travel via AP-7 to Cartagena. Removal, fitting, sealing with Sika Boom and cleaning.

Time: 1-2 days per home

06

Handover and warranty

Signed handover record, CE + QUALIMARINE documentation, installation certificate and 10-year warranty. Dossier for the IDAE grant.

Time: same day as installation

The team that comes to your home

Named people with local experience

VentanaCosta does not subcontract: the surveyor who measures is on the payroll, and so is the installer. This matters in Cartagena because every area has its own rules — the Centre has Heritage, La Manga has tower logistics and salt, the Ensanche has strict owners' associations with limited working hours and lifts.

We have been installing across Alicante and the Region of Murcia since 2010. Fourteen years, 3,200+ homes, zero court cases.

M

Manuel

Surveyor

18 years measuring across the Levante and Mar Menor. Speaks Spanish and Catalan.

A

Andrei

Multilingual liaison

Spanish, English, Russian. Coordinates works for international clients in La Manga.

J

José

Lead installer

Kömmerling Academy + Cortizo certified. Team of 4 installers.

Frequently asked questions

Answering the most common questions in Cartagena

How long does a full installation in Cartagena take?+

From quote sign-off to handover: 10-14 working days of manufacture + 1-2 days of installation per home (average flat). Add 3-5 weeks for Historic Centre projects to handle the Municipal Heritage paperwork. For 50+ flat communities we plan blocks of 2-3 weeks each.

Does the on-site survey cost anything?+

No. On-site survey + fixed quote are free and no-obligation across all of Cartagena, Cabo de Palos, La Manga, Playa Honda, Santiago de la Ribera and nearby towns like San Pedro del Pinatar, Los Alcázares and Mazarrón.

Can you fit windows in my La Manga flat that won't rust in 3 years?+

Yes. The key is the QUALIMARINE certificate: a lacquering specifically designed for extreme marine environments with additional pretreatment and a coating thickness of ≥ 60 microns. Combined with stainless Roto NX hardware, we guarantee 25+ years without visible rust in La Manga. It costs a little more but spares you redoing the work in 4-5 years.

I live in a Modernist building in the Historic Centre — can you replace my windows?+

Yes, with permission from Cartagena's Municipal Heritage Office. We prepare a technical report with photo-montage, approved RAL specification and a traditional mullion pattern. We use wood-effect uPVC or aluminium lacquered in a historic colour. Typical approval time: 3-5 weeks.

Can you prepare the paperwork for Region of Murcia subsidies?+

Yes. We provide: itemised invoice by chapters, before-and-after energy certificate where required, installer's declaration, product datasheets and CE + QUALIMARINE marking. That gives you everything for NextGen IDAE Region of Murcia, IRPF, INFO and the Cartagena IBI rebate.

Why does it cost more in La Manga than in Cartagena city?+

For two reasons: logistics (single access road, slower transport, tower unloading by lift) and material (certified QUALIMARINE lacquering for extreme salinity costs 18-22% more than standard lacquering). The typical surcharge is +25% compared to an equivalent home in the Ensanche or Los Dolores.

How does payment work? Do you accept finance?+

We accept bank transfer, card and Bizum. Standard payment terms: 50% on signing and 50% on installation completion (not before). For larger La Manga or Mar Menor villa projects we can split into 3 milestones. If you need bank finance, we can recommend lenders with preferential rates for energy refurbishments.

What happens to my old rusted La Manga windows?+

We dismantle them, remove them and take them to an authorised waste facility in the Region of Murcia. The rusted aluminium is recycled. 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 Cartagena

Related products we install

When you refurbish windows it often makes sense to handle the rest of the envelope at the same time: terrace with Mar Menor view, partitions, pergolas for the porch. Same on-site survey, same fixed quote.

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Cities near Cartagena

If you live or own property in a nearby town in the Region of Murcia or southern Alicante, we will travel out. Same free survey and quote within 24-72 h.

PVC Windows in Murcia PVC Windows in Torrevieja PVC Windows in Alicante San Pedro del Pinatar San Javier Mazarrón Los Alcázares

PVC Windows in Cartagena

Specialists in Modernist heritage and extreme salinity

Heritage Office experience

La Manga extreme-salinity protection

Our own factory in Alicante

We know the Naval Base area

Region of Murcia grants

10-year written warranty

Why 20-year-old windows fail in Cartagena

Cartagena climate data (AEMET)

Areas of Cartagena where we install

Solutions by property type in Cartagena

Modernist building in the Historic Centre

High-rise flat in La Manga

Mar Menor / Playa Honda villa

Ensanche / Los Dolores community

PVC or aluminium in Cartagena: which to choose

How much it costs to replace windows in Cartagena

70-100 m² · 6-9 windows

60-90 m² · dual salt exposure

180-280 m² · full enclosure

Standard technical specifications for Cartagena

Cortizo COR 70 aluminium + QUALIMARINE

Standard 4/16/4 climalit glass

Regulations, certificates and official warranties

CE marking (EU Regulation 305/2011)

CTE DB-HE 2019 zone B3

QUALIMARINE (marine lacquering)

Cartagena Heritage Office

Asefave 10-year warranty

Authorised installer certificate

Subsidies for replacing windows in Cartagena

A few projects completed in the last 18 months

Heritage-friendly restoration in a listed building

Aluminium carpentry + QUALIMARINE lacquering

5 m slider with sea view + full enclosure

64 flats — Kömmerling 70 block-wide refurbishment

Step-by-step process, transparent timescales

Contact and guidance

Free on-site survey

Fixed quote

Bespoke manufacture

On-site installation

Handover and warranty

Named people with local experience

Manuel

Andrei

José

Answering the most common questions in Cartagena

Related products we install

Glass curtains

Terrace enclosures

Bathroom partitions

Bioclimatic pergolas

Cities near Cartagena

Request your quote in Cartagena

We work in these areas