Services we offer in Portsmouth, NH
- House washing — safe soft wash cleaning for all siding types
- Roof washing — remove black streaks, algae, moss and lichen
- Gutter cleaning — clear debris, flush downspouts
- Deck cleaning — restore wood and composite surfaces
- Driveway cleaning — concrete, asphalt and pavers
- Oxidation removal — restore faded vinyl siding
- Fence cleaning — wood and vinyl
- Commercial exterior cleaning
Why Portsmouth homeowners choose Giani Exterior Services
From historic homes in the South End to newer construction in Greenland and Newington, we've cleaned properties across Portsmouth and are familiar with the exterior cleaning challenges that come with coastal NH's climate.
We're a small, owner-operated business based in Nottingham, NH — not a franchise. When you call Giani Exterior Services, you're talking directly to the person who will show up and do the work. Every estimate is free, every price is transparent, and every job comes with our 100% satisfaction guarantee.
Call us at (603) 416-1498 or request a free estimate online.
Recent work in Portsmouth
What pressure washing costs in Portsmouth, NH
Portsmouth home sizes and styles vary widely — from compact South End Victorians to larger colonials in the Pannaway Manor and Gosling Road neighborhoods. A typical house wash runs $300–$600 depending on size, story count, and siding type. Roof washing starts at $400 and increases based on roof size, pitch, and extent of algae or moss growth. Gutter cleaning averages $175–$350. We provide a free, no-obligation estimate before any work begins so there are no surprises.
Portsmouth's biggest exterior cleaning challenge: salt air
Portsmouth sits at the mouth of the Piscataqua River, and homes within a mile or two of the water deal with elevated salt air exposure year-round. Salt accelerates the growth of the black algae (Gloeocapsa Magma) responsible for dark streaking on roofs, and it promotes the oxidation that causes white and beige vinyl siding to turn chalky and dull. Homes in neighborhoods like New Castle Road, South Mill Pond, and along the waterfront typically need soft washing more frequently than inland properties — often every 12–18 months rather than every 2–3 years.
Gutter cleaning in Portsmouth
Portsmouth's older neighborhoods have big, mature street trees, and those gutters fill every fall. Homes closer to the water also collect salt and grime on the outside of the gutters, which leaves the dark streaks our gutter brightening takes off. Every cleaning includes clearing the debris, flushing each downspout, checking pitch and hangers, and before and after photos.
If your roof is streaked too, we can wash the roof and clean the gutters in the same visit, which costs less than booking them separately. We clean gutters as late into the fall as the weather allows.
When to book pressure washing in Portsmouth
Spring (April–May) is our busiest period in Portsmouth — homeowners want to clear the winter's grime before the outdoor season begins. We recommend reaching out in March to lock in a spring appointment. Summer slots fill quickly too, especially for homeowners hosting events or listing their home for sale. Fall is typically a good window for gutter cleaning before the leaves finish dropping, and for a final soft wash before winter sets in.