Mastros
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Architectural Services

Architectural Services

Navigate building permits and design with confidence
Two architects in a studio review a project on screen, one standing and leaning over the desk, the other seated and explaining the plans, with bookshelves and scale models in the background.

Professional architectural services from l'Ordre des Architectes certified architects. Expert permit preparation, quality oversight, and complete project management for renovations. ABF expertise for protected zones and guaranteed compliance throughout.

circle check Registered architects and interior designers
circle check High first time permit approval rate
circle check Professional indemnity insurance
circle check ABF approval expertise

The challenges of architectural projects in Paris

Paris building regulations are about more than getting a permit. They're about protecting a city of extraordinary architectural heritage. Between protected zones, ABF oversight, and complex permit types, professional guidance prevents costly mistakes.

ABF approval complexity

Buildings within 500m of monuments need ABF approval. With 1,900 protected sites, most central Paris falls under oversight. DIY applications face high rejection.

Permit confusion

Wrong permit type triggers months of delay. Rejected applications restart from zero. Professional guidance prevents costly mistakes and positions your project for approval.

Protected zone restrictions

Central Paris falls under heritage protection (SPR, ABF zones). Unpermitted work risks €9K-€45K fines, mandatory restoration, and resale complications.

Quality control gaps

Without oversight, issues surface after completion. Architect inspections catch problems early when fixes are cheap. Waiting can mean €5K-€15K in remedial work.

How Mastros coordinates 
your project

From initial consultation to final documentation, we ensure complete coordination with built-in payment protection.
01

Describe your project

Share your property details, project scope, and any permit requirements. We assess complexity and regulatory needs.
02

Receive matched proposals

Architects evaluate your project scope and respond with detailed quotes.
03

Select your team

Review credentials, past projects, and proposed approach before choosing your professional.
04

Track execution

Milestone-based payments. Track deliverables, permit submission, and project milestones.
05

Complete & verify

Full documentation handover, permit confirmations, and compliance records before releasing final payment.

What's Included in every Architectural Service

Project documents being reviewed in an architecture studio.

Professional Standards

  • ✓l'Ordre des Architectes certification
  • ✓Professional indemnity insurance
  • ✓Technical drawing and documentation
  • ✓Regulatory compliance verification
  • ✓Site inspection and assessment
  • ✓Official stamped reports
Structural reinforcement: propped steel beam in an old wall.

Typical timeline

  • ✓Quality inspection - 2-3 hours on-site
  • ✓Design & planning - 2-4 weeks
  • ✓Structural evaluation - 1-2 weeks
  • ✓Déclaration préalable - 1-2 months
  • ✓Permis de construire - 2-4 months
  • ✓Protected zone (ABF) - 3-5 months
Layout plan under review, pen annotations.

Expertise areas

  • ✓Protected zone navigation (ABF)
  • ✓Copropriété compliance
  • ✓Monument historique procedures
  • ✓Building code interpretation
  • ✓Structural engineering coordination
  • ✓Urban planning regulations
  • ✓Heritage conservation
Not Haussmann 32m²

Not Haussmann, Paris 20ème

Involved from the very beginning of the apartment search, the client presented us with this 32 m² apartment in Paris's 20th arrondissement. While attracted by the large windows and unobstructed view, he was nonetheless perplexed by the amount of work required and the existing layout: a disproportionately large kitchen, bathroom, and toilet, making the main room too small and difficult to furnish, single-glazed windows, and outdated finishes.

Our initial role was to guide our client through the purchase process by analyzing the energy performance certificate, the quality of the building's management, and the apartment's inherent qualities.

Since the apartment was structurally divided in two by a load-bearing wall, our concept was to consolidate all the wet rooms into the first zone, thus freeing up the second zone, which would benefit from the light and view, to create a 23 m² living space.

The two zones are separated by an original glass door and distinguished by their flooring: tiles for the waterproof zone and natural linoleum for the living area. This keeps the "technical" spaces grouped together and isolated from the more formal living and sleeping areas.

A simple layout, custom-made furniture, and meticulous attention to detail to achieve the right dimensions for each function allowed us to create a comfortable and spacious apartment. A small apartment that feels like a large one.

The exposed concrete walls, revealed by stripping away the layers of plaster, led us to choose raw and understated materials for an original and calming decor. The use of raw MDF for all the woodwork adds a touch of softness, contrasting with the concrete and aluminum countertops. The light gray tiles and natural linoleum bring light and highlight the colorful objects in the home.

Despite a tight budget, we replaced the windows with double-glazed wooden frames whose white paint is guaranteed for 20 years in order to best respect the original building and promote the use of bio-sourced materials.

Demolition, Electricity, Flooring, Paint
After renovation: 23 m² living space with sleeping corner and desk, raw concrete wall, 32 m² apartment, Paris 20th.After renovation: kitchen with stainless steel worktop, MDF cabinetry, white 10x10 tiles.

Our services

Professional design and permit services from registered architects and interior designers. All services include compliance verification and professional indemnity coverage.

Architect Quality Inspection

650 € - 2 000 €

Building permits & ABF approval

800 € - 3 000 €

Architectural design & planning

1 500 € - 8 000 €

Project management

3 000 € - 15 000 €

What your investment includes

Architectural services ensure professional oversight from design to completion. 

 Here's how architect fees are typically structured following industry standards.

PRICE RANGE — Complete Project Management

3 000 € - 15 000 €
Full architectural oversight for major renovation (or 8 to 15% of budget for projects over €80K)
Where your budget goes
  • Design and planning phases: 56 to 63%
  • Construction oversight: 37 to 44%
  • Site supervision (within oversight): 24 to 28%
  • Permit coordination: included

Why Mastros

Transparent cost breakdown

See exactly where every euro goes
Full breakdown

Milestone payment protection

Pay only when work is approved
Protected

Full visibility on scope and pricing

Know what you're paying for
Real-time

You approve every change

No modifications without your consent
Full control

l'Ordre des Architectes certified

Registered and insured professionals
100% verified

Clear deliverables at each phase

Know exactly what you receive
Defined

Get your free quotes

Describe your project and receive proposals from verified architects. No commitment, 0% commission.