Row houses present unique renovation challenges. Their narrow footprints, shared party walls, and outdated layouts demand a different approach than typical detached home renovations. The 57ALI project in Terrassa, Barcelona, demonstrates how a 20th-century row house can be transformed into a modern rental property while keeping the budget firmly in check. This approach to transforming historic row houses relies on strategic decisions about retaining structure, reusing materials, and targeting investments where they matter most. The project covered 184m² of total floor area, with 167m² renovated and 17m² added through expansion, completed between 2012 and 2013.
Assessing the Structural Core Before Design Begins
The first step in any row house renovation is understanding what parts of the existing structure are worth keeping. Structural elements that remain sound should be retained whenever possible. In the 57ALI project, the design team identified the load-bearing elements worth preserving: floor slabs, party walls, façades, and interior partitions around the stairway that reinforce the whole structure. This philosophy of keeping what works is essential when planning a row house kitchen remodel or any room reconfiguration within a narrow footprint.
Once you identify what stays, you can focus intervention efforts on areas that need the most work. The total renovation area of 167m² was addressed by keeping the structural core intact and only modifying areas that directly improved livability. This selective approach reduces both material costs and construction time. An unmodified row house requires a careful audit before demolition begins.
Identifying Structural Elements Worth Preserving
A systematic evaluation of each building component helps separate what must stay from what can go. Four categories deserve close inspection during the assessment phase.
- Floor slabs: Check for cracks, deflection, and water damage. Precast concrete slabs from the mid-20th century often remain serviceable with minimal reinforcement or patching.
- Party walls: These shared walls between adjacent row houses are almost always structural. Cutting into them requires engineering approval and neighbor coordination, so preserving them saves significant time and cost.
- Façade walls: The front and rear walls define the building envelope. Keep them if the brick or masonry is sound and properly sealed against moisture intrusion.
- Stairway partitions: The stairwell often acts as a lateral bracing element for the entire row house structure. Keeping these partitions intact simplifies the reinforcement plan.
Cost Comparison of Retention vs. Replacement
The financial case for retaining sound structural elements is clear when comparing repair costs against full replacement.
| Structural Element | Retention Cost | Replacement Cost | Typical Savings |
|---|---|---|---|
| Floor slabs | $3,000 – $5,000 | $12,000 – $18,000 | 60–72% |
| Party walls | $1,000 – $2,000 | $8,000 – $15,000 | 75–87% |
| Façade walls | $4,000 – $8,000 | $20,000 – $35,000 | 70–80% |
| Stairway partitions | $500 – $1,500 | $5,000 – $10,000 | 80–85% |
These savings assume the existing elements are in fair to good condition. If severe structural damage is present, replacement may be the safer option.
Expanding Square Footage Within the Existing Building Envelope
Row house expansion rarely means building outward into the yard. More often, it means adding a floor, converting an attic, or creating a roof terrace. The 57ALI project added 17m² to the existing 167m², a modest 10% increase that came primarily from roof modifications. This targeted approach aligns with passive house design principles that prioritize envelope efficiency over raw square footage. Every square meter of expansion must earn its place in the budget.
Vertical expansion strategies for row houses include three main approaches that can be combined depending on zoning rules and structural capacity.
- Roof terrace creation: Remove part of the existing roof to create an outdoor living space. This simultaneously brings light deeper into the floor plan below, solving two problems with one intervention.
- Attic conversion: Raise the roof ridge or install dormers to turn unused attic space into habitable rooms. This works well when the existing roof structure can support the added load.
- Rear extension: Build outward into the yard if property lines and setback requirements allow. This works best when the rear façade can be opened up with large windows or sliding doors to connect indoor and outdoor spaces.
Before pursuing any expansion, verify local zoning codes for floor area ratio limits, height restrictions, and setback requirements.
Working with Exposed Materials and Original Finishes
One of the most distinctive features of the 57ALI project is the preservation of original exposed brick throughout the interior. The brick walls, which were always part of the building’s structure, are left visible in most rooms. Drywall installed alongside these brick walls is painted white to maintain visual balance. This juxtaposition of raw texture with clean surfaces creates the kind of warmth found in a modern barnhouse aesthetic adapted for urban row house settings.
The kitchen ceiling retains original exposed wood, giving the room a rustic feel. A similar wood ceiling appears in the study area, where roof modifications bring light into what was originally a windowless, low-ceilinged space. These material choices are not just aesthetic: they are budget-driven decisions that eliminate the cost of cladding and finishing surfaces.
Balancing Raw and Finished Surfaces
The key to making exposed materials work is pairing them with clean, neutral finishes that prevent the space from feeling unfinished. Each surface treatment serves a specific purpose within the overall design.
| Surface | Treatment | Design Purpose |
|---|---|---|
| Exposed brick wall | Left raw, sealed with matte masonry sealant | Adds texture and historical warmth |
| Adjacent drywall | Painted white, smooth finish | Provides visual contrast and brightness |
| Wood ceiling | Original material, cleaned and sealed | Creates rustic atmosphere without added cost |
| New flooring | Chosen to complement brick tones | Grounds the space and bridges old with new |
Exposed materials require proper sealing to prevent dust, moisture, and deterioration. Brick should be sealed with a breathable masonry sealer that allows water vapor to escape while blocking liquid water.
Managing Light in Deep Row House Layouts
Row houses are typically deep and narrow, with windows only at the front and rear. The center of the floor plan can be dark even on sunny days. The 57ALI project tackles this problem by removing part of the second-floor roof to create a terrace that lets light into the whole room below. This is a strategic window selection approach adapted for roof openings rather than wall openings, but the principle is the same: bring natural light where it is needed most.
Roof Modification Techniques for Light Access
Three roof-based strategies can transform the light profile of a deep row house.
- Light wells: Removing a section of roof above an interior room creates a shaft that channels daylight to lower floors. This works best when the well is lined with white or reflective material.
- Skylights: Installing tubular or flat skylights over corridors and stairwells brings light to the middle of the house without losing floor space.
- Roof terraces: Converting part of the roof to an outdoor terrace simultaneously creates usable outdoor space and opens the room below to overhead light.
Interior Strategies for Light Distribution
Once you bring light in, you need to distribute it effectively through the floor plan.
- Paint walls in white or off-white tones to reflect light deeper into interior spaces.
- Install glass interior doors instead of solid wood doors for rooms that need privacy but can share borrowed light.
- Keep sightlines open between the front and rear of the house by avoiding full-height partitions in the middle of the floor plan.
- Place mirrors opposite window openings to bounce daylight across the room.
- Use light-colored flooring materials that reflect rather than absorb available daylight.
The study area in this project originally had a low ceiling and no windows. The architects renovated parts of the roof to let in natural light, and the new terrace provides additional daylight access from above.
Reconfiguring Living Spaces in Tight Floor Plans
Row house floor plans often feature a series of small rooms arranged along a corridor. Modern living requires more open, connected spaces that can serve multiple functions throughout the day. The 57ALI project uses drywall partitions to create boundaries without fully closing off rooms. In the living room, drywall installed at strategic points separates the dining area while maintaining visual connection to the brick wall that runs through the space. This approach to showcase homes demonstrates how selective partitioning can define zones without sacrificing openness.
Defining Zones Without Full Walls
Practical techniques for room definition in row houses include several options that preserve sightlines and light flow.
- Partial-height partitions: Walls that stop below the ceiling allow light and air to move between zones while providing visual separation. These can be built to counter height or shoulder height depending on the privacy needed.
- Furniture as room dividers: A sofa back, bookshelf unit, or console table can define the boundary between living and dining areas without any construction work.
- Ceiling treatments: Changes in ceiling height, material, or color signal a transition between zones. A dropped ceiling with wood planks over the dining area, for example, creates a visual boundary.
- Floor material changes: Transitioning from tile in the entry to hardwood in the living area tells the eye that one space has ended and another has begun.
The existing height of the ceilings in this project was maintained throughout the renovation. Combined with the exposed brick wall that runs through the space, the continuous ceiling height creates a sense of volume that prevents the narrow floor plan from feeling cramped.
Allocating a Tight Renovation Budget for Maximum Impact
A tight budget does not mean sacrificing quality. The 57ALI project proves that a deliberate focus on structural reuse, selective intervention, and material honesty delivers a habitable, attractive space without overspending. The principles behind this approach align with passive house design and construction thinking, where every dollar spent must improve the building’s performance and durability.
Budget allocation priorities for row house renovations should follow a clear order of spending.
- Structural integrity: Allocate the largest portion of the budget to foundation repairs, wall stabilization, and roof replacement where needed. These fixes are invisible but essential.
- Envelope sealing: Air sealing, insulation, and window upgrades provide the best return on investment for energy savings and occupant comfort.
- Kitchen and bathroom: These rooms deliver the highest value in terms of rental income and resale value. Focus on durable fixtures and simple finishes.
- Finishes and materials: Choose durable, low-cost materials like exposed brick that require no cladding. Let the building’s original fabric do the work of decoration.
- Mechanical systems: Install efficient heating and cooling that fits the compact floor plan. Ductless mini-split systems work well in row houses because they avoid the need for ductwork.
The project shows that a renovation budget can work when every spending decision is tested against a simple question: does this reuse something already here? The original state had only structural elements worth keeping. By reusing floor slabs, party walls, façades, and stairway partitions, the project saved an estimated 60 to 87% on structural costs compared to full replacement. The same logic applies to finishes: exposed brick and wood ceilings cost nothing to install because they were already in place.